Articles | Volume 9, issue 1
https://doi.org/10.5194/se-9-115-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-9-115-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Review article
| 
21 Feb 2018
Review article |
| 21 Feb 2018
| 21 Feb 2018
The seismo-hydromechanical behavior during deep geothermal reservoir stimulations: open questions tackled in a decameter-scale in situ stimulation experiment
Florian Amann
CORRESPONDING AUTHOR
Chair of Engineering Geology and Hydrogeology, RWTH Aachen, Lochnerstrasse 4–20, 52064 Aachen, Germany
formerly at: Department of Earth Sciences, ETH Zurich, Zurich, Switzerland
Valentin Gischig
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Keith Evans
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Joseph Doetsch
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Reza Jalali
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Benoît Valley
Centre for Hydrogeology and Geothermics (CHYN), Laboratory of Geothermics and Reservoir Geomechanics, University of Neuchatel, 2000 Neuchâtel, Switzerland
Hannes Krietsch
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Nathan Dutler
Centre for Hydrogeology and Geothermics (CHYN), Laboratory of Geothermics and Reservoir Geomechanics, University of Neuchatel, 2000 Neuchâtel, Switzerland
Linus Villiger
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Bernard Brixel
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Maria Klepikova
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Anniina Kittilä
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Claudio Madonna
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Stefan Wiemer
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Martin O. Saar
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Simon Loew
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Thomas Driesner
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Hansruedi Maurer
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
Domenico Giardini
Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland
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Questions on issues such as anthropogenic earthquakes and deep geothermal energy developments require a better understanding of the fractured rock. Experiments conducted at reduced scales but with higher-resolution observations can shed some light. To this end, the BedrettoLab was recently established in an existing tunnel in Ticino, Switzerland, with preliminary efforts to characterize realistic rock mass behavior at the hectometer scale.
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An experimentally deformed sample of Opalinus Clay (OPA), which is being considered as host rock for nuclear waste in Switzerland, was studied by electron microscopy to image deformation microstructures. Deformation localised by forming micrometre-thick fractures. Deformation zones show dilatant micro-cracking, granular flow and bending grains, and pore collapse. Our model, with three different stages of damage accumulation, illustrates microstructural deformation in a compressed OPA sample.
This article is included in the Encyclopedia of Geosciences
Hannes Krietsch, Valentin S. Gischig, Joseph Doetsch, Keith F. Evans, Linus Villiger, Mohammadreza Jalali, Benoît Valley, Simon Löw, and Florian Amann
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Hydraulic stimulation summarizes fracture initiation and reactivation due to high-pressure fluid injection. Several borehole intervals covering intact rock and pre-existing fractures were targets for high-pressure fluid injections within a decameter-scale, crystalline rock volume. The observed induced seismicity strongly depends on the target geology. In addition, the severity of the induced seismicity per experiment counter correlates with the observed transmissivity enhancement.
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Nathan Dutler, Benoît Valley, Valentin Gischig, Linus Villiger, Hannes Krietsch, Joseph Doetsch, Bernard Brixel, Mohammadreza Jalali, and Florian Amann
Solid Earth, 10, 1877–1904, https://doi.org/10.5194/se-10-1877-2019, https://doi.org/10.5194/se-10-1877-2019, 2019
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In this study, we present seismo-hydromechanical results from six hydraulic fracturing experiments executed in the framework of the In-situ Stimulation and Circulation (ISC) project. The well-characterized and extensively monitored target rock allows for the study of (1) the response of the rock mass, (2) the injection and pore pressure response, and (3) the geometry of newly created fractures and their interaction with the natural fracture network.
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Seismic hazard and risk are time dependent as seismicity is clustered and exposure can change rapidly. We are developing an interdisciplinary dynamic earthquake risk framework for advancing earthquake risk mitigation in Switzerland. This includes various earthquake risk products and services, such as operational earthquake forecasting and early warning. Standardisation and harmonisation into seamless solutions that access the same databases, workflows, and software are a crucial component.
This article is included in the Encyclopedia of Geosciences
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This article is included in the Encyclopedia of Geosciences
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EGUsphere, https://doi.org/10.5194/egusphere-2023-3153, https://doi.org/10.5194/egusphere-2023-3153, 2024
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Relying on recent accomplishments in collecting and harmonizing data by the 2020 European Seismic Hazard Model (ESHM20) and leveraging advancements in state-of-the-art earthquake forecasting methods, we develop a harmonized earthquake forecasting model for Europe. We propose several model variants and test them on training data for consistency and on a seven-year testing period against each other, as well as against both a time-independent benchmark and a global time-dependent benchmark.
This article is included in the Encyclopedia of Geosciences
Laurentiu Danciu, Domenico Giardini, Graeme Weatherill, Roberto Basili, Shyam Nandan, Andrea Rovida, Céline Beauval, Pierre-Yves Bard, Marco Pagani, Celso Guillermo Reyes, Karin Sesetyan, Susana Vilanova, Fabrice Cotton, and Stefan Wiemer
EGUsphere, https://doi.org/10.5194/egusphere-2023-3062, https://doi.org/10.5194/egusphere-2023-3062, 2024
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The 2020 European Seismic Hazard Model (ESHM20) is the latest seismic hazard assessment update for the Euro-Mediterranean region. This state-of-the-art model delivers a broad range of hazard results, including hazard curves, maps, and uniform hazard spectra. ESHM20 provides two hazard maps as informative reference in the next update of the European Seismic Design Codes (CEN EC8) and it also provides a key input to the first earthquake risk model for Europe (Crowley et al., 2021).
This article is included in the Encyclopedia of Geosciences
Marius Schneider, Nicolas Oestreicher, Thomas Ehrat, and Simon Loew
Nat. Hazards Earth Syst. Sci., 23, 3337–3354, https://doi.org/10.5194/nhess-23-3337-2023, https://doi.org/10.5194/nhess-23-3337-2023, 2023
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Rockfalls and their hazards are typically treated as statistical events based on rockfall catalogs, but only a few complete rockfall inventories are available today. Here, we present new results from a Doppler radar rockfall alarm system, which has operated since 2018 at a high frequency under all illumination and weather conditions at a site where frequent rockfall events threaten a village and road. The new data set is used to investigate rockfall triggers in an active rockslide complex.
This article is included in the Encyclopedia of Geosciences
Roberto Basili, Laurentiu Danciu, Céline Beauval, Karin Sesetyan, Susana Pires Vilanova, Shota Adamia, Pierre Arroucau, Jure Atanackov, Stephane Baize, Carolina Canora, Riccardo Caputo, Michele Matteo Cosimo Carafa, Edward Marc Cushing, Susana Custódio, Mine Betul Demircioglu Tumsa, João C. Duarte, Athanassios Ganas, Julián García-Mayordomo, Laura Gómez de la Peña, Eulàlia Gràcia, Petra Jamšek Rupnik, Hervé Jomard, Vanja Kastelic, Francesco Emanuele Maesano, Raquel Martín-Banda, Sara Martínez-Loriente, Marta Neres, Hector Perea, Barbara Šket Motnikar, Mara Monica Tiberti, Nino Tsereteli, Varvara Tsironi, Roberto Vallone, Kris Vanneste, Polona Zupančič, and Domenico Giardini
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2023-118, https://doi.org/10.5194/nhess-2023-118, 2023
Revised manuscript under review for NHESS
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This study presents the European Fault-Source Model 2020 (EFSM20), a dataset of 1,248 geologic crustal faults and four subduction systems, each having the necessary parameters to forecast long-term earthquake occurrences in the European continent. This dataset constituted one of the main inputs for the recently released European Seismic Hazard Model 2020, a key instrument to mitigate seismic risk in Europe. EFSM20 adopts recognized open-standard formats, and it is openly accessible and reusable.
This article is included in the Encyclopedia of Geosciences
Po-Wei Huang, Bernd Flemisch, Chao-Zhong Qin, Martin O. Saar, and Anozie Ebigbo
Geosci. Model Dev., 16, 4767–4791, https://doi.org/10.5194/gmd-16-4767-2023, https://doi.org/10.5194/gmd-16-4767-2023, 2023
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Water in natural environments consists of many ions. Ions are electrically charged and exert electric forces on each other. We discuss whether the electric forces are relevant in describing mixing and reaction processes in natural environments. By comparing our computer simulations to lab experiments in literature, we show that the electric interactions between ions can play an essential role in mixing and reaction processes, in which case they should not be neglected in numerical modeling.
This article is included in the Encyclopedia of Geosciences
Sebastian Hellmann, Melchior Grab, Cedric Patzer, Andreas Bauder, and Hansruedi Maurer
Solid Earth, 14, 805–821, https://doi.org/10.5194/se-14-805-2023, https://doi.org/10.5194/se-14-805-2023, 2023
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Acoustic waves are suitable to analyse the physical properties of the subsurface. For this purpose, boreholes are quite useful to deploy a source and receivers in the target area to get a comprehensive high-resolution dataset. However, when conducting such experiments in a subsurface such as glaciers that continuously move, the boreholes get deformed. In our study, we therefore developed a method that allows an analysis of the ice while considering deformations.
This article is included in the Encyclopedia of Geosciences
Athanasios N. Papadopoulos, Philippe Roth, Laurentiu Danciu, Paolo Bergamo, Francesco Panzera, Donat Fäh, Carlo Cauzzi, Blaise Duvernay, Alireza Khodaverdian, Pierino Lestuzzi, Ömer Odabaşi, Ettore Fagà, Paolo Bazzurro, Michèle Marti, Nadja Valenzuela, Irina Dallo, Nicolas Schmid, Philip Kästli, Florian Haslinger, and Stefan Wiemer
EGUsphere, https://doi.org/10.5194/egusphere-2023-1504, https://doi.org/10.5194/egusphere-2023-1504, 2023
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The Earthquake Risk Model of Switzerland (ERM-CH23), released in early 2023, is the culmination of a multidisciplinary effort aiming to achieve, for the first time, a comprehensive assessment of the potential consequences of earthquakes on the Swiss building stock and population. ERM-CH23 provides risk estimates for various impact metrics, ranging from economic loss as a result of damage to buildings and their contents, to human losses, such as deaths, injuries and displaced population.
This article is included in the Encyclopedia of Geosciences
Lisa Maria Ringel, Mohammadreza Jalali, and Peter Bayer
Hydrol. Earth Syst. Sci., 26, 6443–6455, https://doi.org/10.5194/hess-26-6443-2022, https://doi.org/10.5194/hess-26-6443-2022, 2022
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Fractured rocks host a class of aquifers that serve as major freshwater resources worldwide. This work is dedicated to resolving the three-dimensional hydraulic and structural properties of fractured rock. For this purpose, hydraulic tomography experiments at the Grimsel Test Site in Switzerland are utilized, and the discrete fracture network is inverted. The comparison of the inversion results with independent findings from other studies demonstrates the validity of the approach.
This article is included in the Encyclopedia of Geosciences
Lisa Winhausen, Kavan Khaledi, Mohammadreza Jalali, Janos L. Urai, and Florian Amann
Solid Earth, 13, 901–915, https://doi.org/10.5194/se-13-901-2022, https://doi.org/10.5194/se-13-901-2022, 2022
Short summary
Short summary
Triaxial compression tests at different effective stresses allow for analysing the deformation behaviour of Opalinus Clay, the potential host rock for nuclear waste in Switzerland. We conducted microstructural investigations of the deformed samples to relate the bulk hydro-mechanical behaviour to the processes on the microscale. Results show a transition from brittle- to more ductile-dominated deformation. We propose a non-linear failure envelop associated with the failure mode transition.
This article is included in the Encyclopedia of Geosciences
Xiaodong Ma, Marian Hertrich, Florian Amann, Kai Bröker, Nima Gholizadeh Doonechaly, Valentin Gischig, Rebecca Hochreutener, Philipp Kästli, Hannes Krietsch, Michèle Marti, Barbara Nägeli, Morteza Nejati, Anne Obermann, Katrin Plenkers, Antonio P. Rinaldi, Alexis Shakas, Linus Villiger, Quinn Wenning, Alba Zappone, Falko Bethmann, Raymi Castilla, Francisco Seberto, Peter Meier, Thomas Driesner, Simon Loew, Hansruedi Maurer, Martin O. Saar, Stefan Wiemer, and Domenico Giardini
Solid Earth, 13, 301–322, https://doi.org/10.5194/se-13-301-2022, https://doi.org/10.5194/se-13-301-2022, 2022
Short summary
Short summary
Questions on issues such as anthropogenic earthquakes and deep geothermal energy developments require a better understanding of the fractured rock. Experiments conducted at reduced scales but with higher-resolution observations can shed some light. To this end, the BedrettoLab was recently established in an existing tunnel in Ticino, Switzerland, with preliminary efforts to characterize realistic rock mass behavior at the hectometer scale.
This article is included in the Encyclopedia of Geosciences
Lisa Winhausen, Mohammadreza Jalali, and Florian Amann
Saf. Nucl. Waste Disposal, 1, 301–301, https://doi.org/10.5194/sand-1-301-2021, https://doi.org/10.5194/sand-1-301-2021, 2021
Lisa Winhausen, Jop Klaver, Joyce Schmatz, Guillaume Desbois, Janos L. Urai, Florian Amann, and Christophe Nussbaum
Solid Earth, 12, 2109–2126, https://doi.org/10.5194/se-12-2109-2021, https://doi.org/10.5194/se-12-2109-2021, 2021
Short summary
Short summary
An experimentally deformed sample of Opalinus Clay (OPA), which is being considered as host rock for nuclear waste in Switzerland, was studied by electron microscopy to image deformation microstructures. Deformation localised by forming micrometre-thick fractures. Deformation zones show dilatant micro-cracking, granular flow and bending grains, and pore collapse. Our model, with three different stages of damage accumulation, illustrates microstructural deformation in a compressed OPA sample.
This article is included in the Encyclopedia of Geosciences
Gregory Church, Andreas Bauder, Melchior Grab, and Hansruedi Maurer
The Cryosphere, 15, 3975–3988, https://doi.org/10.5194/tc-15-3975-2021, https://doi.org/10.5194/tc-15-3975-2021, 2021
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In this field study, we acquired a 3D radar survey over an active drainage network that transported meltwater through a Swiss glacier. We successfully imaged both englacial and subglacial pathways and were able to confirm long-standing glacier hydrology theory regarding meltwater pathways. The direction of these meltwater pathways directly impacts the glacier's velocity, and therefore more insightful field observations are needed in order to improve our understanding of this complex system.
This article is included in the Encyclopedia of Geosciences
Sebastian Hellmann, Melchior Grab, Johanna Kerch, Henning Löwe, Andreas Bauder, Ilka Weikusat, and Hansruedi Maurer
The Cryosphere, 15, 3507–3521, https://doi.org/10.5194/tc-15-3507-2021, https://doi.org/10.5194/tc-15-3507-2021, 2021
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In this study, we analyse whether ultrasonic measurements on ice core samples could be employed to derive information about the particular ice crystal orientation in these samples. We discuss if such ultrasonic scans of ice core samples could provide similarly detailed results as the established methods, which usually destroy the ice samples. Our geophysical approach is minimally invasive and could support the existing methods with additional and (semi-)continuous data points along the ice core.
This article is included in the Encyclopedia of Geosciences
Peter-Lasse Giertzuch, Joseph Doetsch, Alexis Shakas, Mohammadreza Jalali, Bernard Brixel, and Hansruedi Maurer
Solid Earth, 12, 1497–1513, https://doi.org/10.5194/se-12-1497-2021, https://doi.org/10.5194/se-12-1497-2021, 2021
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Two time-lapse borehole ground penetrating radar (GPR) surveys were conducted during saline tracer experiments in weakly fractured crystalline rock with sub-millimeter fractures apertures, targeting electrical conductivity changes. The combination of time-lapse reflection and transmission GPR surveys from different boreholes allowed monitoring the tracer flow and reconstructing the flow path and its temporal evolution in 3D and provided a realistic visualization of the hydrological processes.
This article is included in the Encyclopedia of Geosciences
Sebastian Hellmann, Johanna Kerch, Ilka Weikusat, Andreas Bauder, Melchior Grab, Guillaume Jouvet, Margit Schwikowski, and Hansruedi Maurer
The Cryosphere, 15, 677–694, https://doi.org/10.5194/tc-15-677-2021, https://doi.org/10.5194/tc-15-677-2021, 2021
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We analyse the orientation of ice crystals in an Alpine glacier and compare this orientation with the ice flow direction. We found that the crystals orient in the direction of the largest stress which is in the flow direction in the upper parts of the glacier and in the vertical direction for deeper zones of the glacier. The grains cluster around this maximum stress direction, in particular four-point maxima, most likely as a result of recrystallisation under relatively warm conditions.
This article is included in the Encyclopedia of Geosciences
Alba Zappone, Antonio Pio Rinaldi, Melchior Grab, Quinn C. Wenning, Clément Roques, Claudio Madonna, Anne C. Obermann, Stefano M. Bernasconi, Matthias S. Brennwald, Rolf Kipfer, Florian Soom, Paul Cook, Yves Guglielmi, Christophe Nussbaum, Domenico Giardini, Marco Mazzotti, and Stefan Wiemer
Solid Earth, 12, 319–343, https://doi.org/10.5194/se-12-319-2021, https://doi.org/10.5194/se-12-319-2021, 2021
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The success of the geological storage of carbon dioxide is linked to the availability at depth of a capable reservoir and an impermeable caprock. The sealing capacity of the caprock is a key parameter for long-term CO2 containment. Faults crosscutting the caprock might represent preferential pathways for CO2 to escape. A decameter-scale experiment on injection in a fault, monitored by an integrated network of multiparamerter sensors, sheds light on the mobility of fluids within the fault.
This article is included in the Encyclopedia of Geosciences
Larissa de Palézieux, Kerry Leith, and Simon Loew
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-85, https://doi.org/10.5194/esurf-2020-85, 2020
Revised manuscript not accepted
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Large creeping landslides are persistent features in mountainous landscapes. In order to quantify the long-term evolution of landslides and their interaction with river channels, we use a new metric for landslide-induced channel offset, which allows us to identify locations associated with increased landslide activity and estimate landslide displacement rates over a period of 1 Myr.
This article is included in the Encyclopedia of Geosciences
Camilla Rossi, Francesco Grigoli, Simone Cesca, Sebastian Heimann, Paolo Gasperini, Vala Hjörleifsdóttir, Torsten Dahm, Christopher J. Bean, Stefan Wiemer, Luca Scarabello, Nima Nooshiri, John F. Clinton, Anne Obermann, Kristján Ágústsson, and Thorbjörg Ágústsdóttir
Adv. Geosci., 54, 129–136, https://doi.org/10.5194/adgeo-54-129-2020, https://doi.org/10.5194/adgeo-54-129-2020, 2020
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We investigate the microseismicity occurred at Hengill area, a complex tectonic and geothermal site, where the origin of earthquakes may be either natural or anthropogenic. We use a very dense broadband seismic monitoring network and apply full-waveform based method for location. Our results and first characterization identified different types of microseismic clusters, which might be associated to either production/injection or the tectonic activity of the geothermal area.
This article is included in the Encyclopedia of Geosciences
Gregory Church, Melchior Grab, Cédric Schmelzbach, Andreas Bauder, and Hansruedi Maurer
The Cryosphere, 14, 3269–3286, https://doi.org/10.5194/tc-14-3269-2020, https://doi.org/10.5194/tc-14-3269-2020, 2020
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In this field study, we repeated ground-penetrating radar measurements over an active englacial channel network that transports meltwater through the glacier. We successfully imaged the englacial meltwater pathway and were able to delimitate the channel's shape. Meltwater from the glacier can impact the glacier's dynamics if it reaches the ice–bed interface, and therefore monitoring these englacial drainage networks is important to understand how these networks behave throughout a season.
This article is included in the Encyclopedia of Geosciences
Hannes Krietsch, Valentin S. Gischig, Joseph Doetsch, Keith F. Evans, Linus Villiger, Mohammadreza Jalali, Benoît Valley, Simon Löw, and Florian Amann
Solid Earth, 11, 1699–1729, https://doi.org/10.5194/se-11-1699-2020, https://doi.org/10.5194/se-11-1699-2020, 2020
Joseph Doetsch, Hannes Krietsch, Cedric Schmelzbach, Mohammadreza Jalali, Valentin Gischig, Linus Villiger, Florian Amann, and Hansruedi Maurer
Solid Earth, 11, 1441–1455, https://doi.org/10.5194/se-11-1441-2020, https://doi.org/10.5194/se-11-1441-2020, 2020
Marco Broccardo, Arnaud Mignan, Francesco Grigoli, Dimitrios Karvounis, Antonio Pio Rinaldi, Laurentiu Danciu, Hannes Hofmann, Claus Milkereit, Torsten Dahm, Günter Zimmermann, Vala Hjörleifsdóttir, and Stefan Wiemer
Nat. Hazards Earth Syst. Sci., 20, 1573–1593, https://doi.org/10.5194/nhess-20-1573-2020, https://doi.org/10.5194/nhess-20-1573-2020, 2020
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This study presents a first-of-its-kind pre-drilling probabilistic induced seismic risk analysis for the Geldinganes (Iceland) deep-hydraulic stimulation. The results of the assessment indicate that the individual risk within a radius of 2 km around the injection point is below the safety limits. However, the analysis is affected by a large variability due to the presence of pre-drilling deep uncertainties. This suggests the need for online risk updating during the stimulation.
This article is included in the Encyclopedia of Geosciences
Dominik Zbinden, Antonio Pio Rinaldi, Tobias Diehl, and Stefan Wiemer
Solid Earth, 11, 909–933, https://doi.org/10.5194/se-11-909-2020, https://doi.org/10.5194/se-11-909-2020, 2020
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The deep geothermal project in St. Gallen, Switzerland, aimed at generating electricity and heat. The fluid pumped into the underground caused hundreds of small earthquakes and one larger one felt by the local population. Here we use computer simulations to study the physical processes that led to the earthquakes. We find that gas present in the subsurface could have intensified the seismicity, which may have implications for future geothermal projects conducted in similar geological conditions.
This article is included in the Encyclopedia of Geosciences
Linus Villiger, Valentin Samuel Gischig, Joseph Doetsch, Hannes Krietsch, Nathan Oliver Dutler, Mohammadreza Jalali, Benoît Valley, Paul Antony Selvadurai, Arnaud Mignan, Katrin Plenkers, Domenico Giardini, Florian Amann, and Stefan Wiemer
Solid Earth, 11, 627–655, https://doi.org/10.5194/se-11-627-2020, https://doi.org/10.5194/se-11-627-2020, 2020
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Hydraulic stimulation summarizes fracture initiation and reactivation due to high-pressure fluid injection. Several borehole intervals covering intact rock and pre-existing fractures were targets for high-pressure fluid injections within a decameter-scale, crystalline rock volume. The observed induced seismicity strongly depends on the target geology. In addition, the severity of the induced seismicity per experiment counter correlates with the observed transmissivity enhancement.
This article is included in the Encyclopedia of Geosciences
Michèle Marti, Michael Stauffacher, and Stefan Wiemer
Nat. Hazards Earth Syst. Sci., 19, 2677–2700, https://doi.org/10.5194/nhess-19-2677-2019, https://doi.org/10.5194/nhess-19-2677-2019, 2019
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Maps are an established way to illustrate natural hazards and regularly used to communicate with non-experts. However, there is evidence that they are frequently misconceived. Using a real case, our study shows that applying or disregarding best practices in visualization, editing, and presentation significantly impacts the comprehensibility of seismic hazard information. We suggest scrutinizing current natural-hazard communication strategies and empirically testing new products.
This article is included in the Encyclopedia of Geosciences
Donald W. Vasco, Joseph Doetsch, and Ralf Brauchler
Hydrol. Earth Syst. Sci., 23, 4541–4560, https://doi.org/10.5194/hess-23-4541-2019, https://doi.org/10.5194/hess-23-4541-2019, 2019
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This paper presents the application of a new approach for calculating the path of a pressure transient in a heterogeneous porous medium containing a slightly compressible fluid. Unlike previous asymptotic approaches, the expressions for the path and travel time are valid in the presence of rapid variations in material properties. The technique is applied to both synthetic transient pressure variations from a test example and actual field data from a field experiment in Widen, Switzerland.
This article is included in the Encyclopedia of Geosciences
Nathan Dutler, Benoît Valley, Valentin Gischig, Linus Villiger, Hannes Krietsch, Joseph Doetsch, Bernard Brixel, Mohammadreza Jalali, and Florian Amann
Solid Earth, 10, 1877–1904, https://doi.org/10.5194/se-10-1877-2019, https://doi.org/10.5194/se-10-1877-2019, 2019
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In this study, we present seismo-hydromechanical results from six hydraulic fracturing experiments executed in the framework of the In-situ Stimulation and Circulation (ISC) project. The well-characterized and extensively monitored target rock allows for the study of (1) the response of the rock mass, (2) the injection and pore pressure response, and (3) the geometry of newly created fractures and their interaction with the natural fracture network.
This article is included in the Encyclopedia of Geosciences
Lisbeth Langhammer, Melchior Grab, Andreas Bauder, and Hansruedi Maurer
The Cryosphere, 13, 2189–2202, https://doi.org/10.5194/tc-13-2189-2019, https://doi.org/10.5194/tc-13-2189-2019, 2019
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We have developed a novel procedure for glacier thickness estimations that combines traditional glaciological modeling constraints with ground-truth data, for example, those obtained with ground-penetrating radar (GPR) measurements. This procedure is very useful for determining ice volume when only limited data are available. Furthermore, we outline a strategy for acquiring GPR data on glaciers, such that the cost/benefit ratio is optimized.
This article is included in the Encyclopedia of Geosciences
Jérôme Azzola, Benoît Valley, Jean Schmittbuhl, and Albert Genter
Solid Earth, 10, 1155–1180, https://doi.org/10.5194/se-10-1155-2019, https://doi.org/10.5194/se-10-1155-2019, 2019
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In projects based on enhanced geothermal system (EGS) technology, knowledge of the in situ stress state is of central importance to predict the response of the rock mass to different stimulation programs. We propose a characterization of the in situ stress state from the analysis of ultrasonic borehole imager (UBI) data acquired at different key moments of the reservoir. We discuss a significant stress rotation at depth and the absence of a significant change in the stress magnitude.
This article is included in the Encyclopedia of Geosciences
Quinn C. Wenning, Claudio Madonna, Antoine de Haller, and Jean-Pierre Burg
Solid Earth, 9, 683–698, https://doi.org/10.5194/se-9-683-2018, https://doi.org/10.5194/se-9-683-2018, 2018
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We measured the elastic and fluid flow properties in a ductile-brittle shear zone. The results suggest that although brittle deformation has persisted in the recent fault evolution, precursory ductile microstructure continues to control the petrophysical properties outside the fault core. The results are a glimpse into the evolutionary path of a shear zone during the ductile to brittle transition and are insightful for geothermal energy and geologic waste disposal exploitation and usage.
This article is included in the Encyclopedia of Geosciences
Valentin Samuel Gischig, Joseph Doetsch, Hansruedi Maurer, Hannes Krietsch, Florian Amann, Keith Frederick Evans, Morteza Nejati, Mohammadreza Jalali, Benoît Valley, Anne Christine Obermann, Stefan Wiemer, and Domenico Giardini
Solid Earth, 9, 39–61, https://doi.org/10.5194/se-9-39-2018, https://doi.org/10.5194/se-9-39-2018, 2018
Katrin M. Wild, Patric Walter, and Florian Amann
Solid Earth, 8, 351–360, https://doi.org/10.5194/se-8-351-2017, https://doi.org/10.5194/se-8-351-2017, 2017
Melchior Grab, Beatriz Quintal, Eva Caspari, Hansruedi Maurer, and Stewart Greenhalgh
Solid Earth, 8, 255–279, https://doi.org/10.5194/se-8-255-2017, https://doi.org/10.5194/se-8-255-2017, 2017
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Hot fluids and hydraulically conductive rock formations are essential for the accessibility of geothermal resources. We use numerical modeling techniques to investigate how seismic waves change their shape in presence of these factors. We demonstrate how to parameterize such models depending on the local geology and as a function of depth. Finally, we show how the attenuation, i.e. the energy loss of the wave, can be indicative for permeable rock fractures saturated with a fluid of specific type.
This article is included in the Encyclopedia of Geosciences
Irene Molinari, John Clinton, Edi Kissling, György Hetényi, Domenico Giardini, Josip Stipčević, Iva Dasović, Marijan Herak, Vesna Šipka, Zoltán Wéber, Zoltán Gráczer, Stefano Solarino, the Swiss-AlpArray Field Team, and the AlpArray Working Group
Adv. Geosci., 43, 15–29, https://doi.org/10.5194/adgeo-43-15-2016, https://doi.org/10.5194/adgeo-43-15-2016, 2016
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AlpArray is a collaborative seismological project in Europe that includes ~ 50 research institutes and seismological observatories. At its heart is the collection of top-quality seismological data from a dense network of stations in the Alpine region: the AlpArray Seismic Network (AASN). We report the Swiss contribution: site selections, installation, data quality and management. We deployed 27 temporary BB stations across 5 countries as result of a fruitful collaboration between 5 institutes.
This article is included in the Encyclopedia of Geosciences
Related subject area
Geophysics
Comparison of surface-wave techniques to estimate S- and P-wave velocity models from active seismic data
Integration of automatic implicit geological modelling in deterministic geophysical inversion
Complex fault system revealed by 3-D seismic reflection data with deep learning and fault network analysis
Numerical modeling of stresses and deformation in the Zagros–Iranian Plateau region
Advanced seismic characterization of a geothermal carbonate reservoir – insight into the structure and diagenesis of a reservoir in the German Molasse Basin
Electrical conductivity of anhydrous and hydrous gabbroic melt under high temperature and high pressure: implications for the high-conductivity anomalies in the mid-ocean ridge region
Ground motion emissions due to wind turbines: observations, acoustic coupling, and attenuation relationships
Formation and geophysical character of transitional crust at the passive continental margin around Walvis Ridge, Namibia
Seismic amplitude response to internal heterogeneity of mass-transport deposits
Investigation of the effects of surrounding media on the distributed acoustic sensing of a helically wound fibre-optic cable with application to the New Afton deposit, British Columbia
Utilisation of probabilistic magnetotelluric modelling to constrain magnetic data inversion: proof-of-concept and field application
Seismic wave modeling of fluid-saturated fractured porous rock: Including fluid pressure diffusion effects of discrete distributed large-scale fractures
Geophysical analysis of an area affected by subsurface dissolution – case study of an inland salt marsh in northern Thuringia, Germany
Comparison of straight-ray and curved-ray surface wave tomography approaches in near-surface studies
An efficient probabilistic workflow for estimating induced earthquake parameters in 3D heterogeneous media
3D deep geothermal reservoir imaging with wireline distributed acoustic sensing in two boreholes
3D high-resolution seismic imaging of the iron oxide deposits in Ludvika (Sweden) using full-waveform inversion and reverse time migration
Three-dimensional reflection seismic imaging of the iron oxide deposits in the Ludvika mining area, Sweden, using Fresnel volume migration
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland
Ambient seismic noise analysis of LARGE-N data for mineral exploration in the Central Erzgebirge, Germany
Surface-wave tomography for mineral exploration: a successful combination of passive and active data (Siilinjärvi phosphorus mine, Finland)
Reflection tomography by depth warping: a case study across the Java trench
Dynamic motion monitoring of a 3.6 km long steel rod in a borehole during cold-water injection with distributed fiber-optic sensing
Impact of Timanian thrust systems on the late Neoproterozoic–Phanerozoic tectonic evolution of the Barents Sea and Svalbard
Forearc density structure of the overriding plate in the northern area of the giant 1960 Valdivia earthquake
Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
Investigating the effects of intersection flow localization in equivalent-continuum-based upscaling of flow in discrete fracture networks
Cross-diffusion waves resulting from multiscale, multiphysics instabilities: application to earthquakes
Reverse time migration (RTM) imaging of iron oxide deposits in the Ludvika mining area, Sweden
Near-surface structure of the Sodankylä area in Finland, obtained by passive seismic interferometry
Evolution of the Iberian Massif as deduced from its crustal thickness and geometry of a mid-crustal (Conrad) discontinuity
Four-dimensional tracer flow reconstruction in fractured rock through borehole ground-penetrating radar (GPR) monitoring
Moho topography beneath the European Eastern Alps by global-phase seismic interferometry
Seismic imaging across fault systems in the Abitibi greenstone belt – an analysis of pre- and post-stack migration approaches in the Chibougamau area, Quebec, Canada
Early Cenozoic Eurekan strain partitioning and decoupling in central Spitsbergen, Svalbard
On the comparison of strain measurements from fibre optics with a dense seismometer array at Etna volcano (Italy)
Cross-diffusion waves resulting from multiscale, multi-physics instabilities: theory
Multi-scale analysis and modelling of aeromagnetic data over the Bétaré-Oya area in eastern Cameroon, for structural evidence investigations
The impact of seismic interpretation methods on the analysis of faults: a case study from the Snøhvit field, Barents Sea
Wireline distributed acoustic sensing allows 4.2 km deep vertical seismic profiling of the Rotliegend 150 °C geothermal reservoir in the North German Basin
Integrated land and water-borne geophysical surveys shed light on the sudden drying of large karst lakes in southern Mexico
Sparse 3D reflection seismic survey for deep-targeting iron oxide deposits and their host rocks, Ludvika Mines, Sweden
Fault sealing and caprock integrity for CO2 storage: an in situ injection experiment
What can seismic noise tell us about the Alpine reactivation of the Iberian Massif? An example in the Iberian Central System
In situ hydromechanical responses during well drilling recorded by fiber-optic distributed strain sensing
Coherent diffraction imaging for enhanced fault and fracture network characterization
On the morphology and amplitude of 2D and 3D thermal anomalies induced by buoyancy-driven flow within and around fault zones
Characterizing a decametre-scale granitic reservoir using ground-penetrating radar and seismic methods
Mantle flow below the central and greater Alpine region: insights from SKS anisotropy analysis at AlpArray and permanent stations
Upper Jurassic carbonate buildups in the Miechów Trough, southern Poland – insights from seismic data interpretations
Farbod Khosro Anjom, Frank Adler, and Laura Valentina Socco
Solid Earth, 15, 367–386, https://doi.org/10.5194/se-15-367-2024, https://doi.org/10.5194/se-15-367-2024, 2024
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Most surface-wave techniques focus on estimating the S-wave velocity (VS) model and consider the P-wave velocity (VP) model as prior information in the inversion step. Here, we show the application of three surface-wave methods to estimate both VS and VP models. We apply the methods to the data from a hard-rock site that were acquired through the irregular source–receiver recording technique. We compare the outcomes and performances of the methods in detail.
This article is included in the Encyclopedia of Geosciences
Jérémie Giraud, Guillaume Caumon, Lachlan Grose, Vitaliy Ogarko, and Paul Cupillard
Solid Earth, 15, 63–89, https://doi.org/10.5194/se-15-63-2024, https://doi.org/10.5194/se-15-63-2024, 2024
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We present and test an algorithm that integrates geological modelling into deterministic geophysical inversion. This is motivated by the need to model the Earth using all available data and to reconcile the different types of measurements. We introduce the methodology and test our algorithm using two idealised scenarios. Results suggest that the method we propose is effectively capable of improving the models recovered by geophysical inversion and may be applied in real-world scenarios.
This article is included in the Encyclopedia of Geosciences
Thilo Wrona, Indranil Pan, Rebecca E. Bell, Christopher A.-L. Jackson, Robert L. Gawthorpe, Haakon Fossen, Edoseghe E. Osagiede, and Sascha Brune
Solid Earth, 14, 1181–1195, https://doi.org/10.5194/se-14-1181-2023, https://doi.org/10.5194/se-14-1181-2023, 2023
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We need to understand where faults are to do the following: (1) assess their seismic hazard, (2) explore for natural resources and (3) store CO2 safely in the subsurface. Currently, we still map subsurface faults primarily by hand using seismic reflection data, i.e. acoustic images of the Earth. Mapping faults this way is difficult and time-consuming. Here, we show how to use deep learning to accelerate fault mapping and how to use networks or graphs to simplify fault analyses.
This article is included in the Encyclopedia of Geosciences
Srishti Singh and Radheshyam Yadav
Solid Earth, 14, 937–959, https://doi.org/10.5194/se-14-937-2023, https://doi.org/10.5194/se-14-937-2023, 2023
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We use numerical models to study the stresses arising from gravitational potential energy (GPE) variations and shear tractions associated with mantle convection in the Zagros–Iran region. The joint models predicted consistent deviatoric stresses that can explain most of the deformation indicators. Stresses associated with mantle convection are found to be higher than those from GPE, thus indicating the deformation in this region may primarily be caused by the mantle, except in eastern Iran.
This article is included in the Encyclopedia of Geosciences
Sonja H. Wadas, Johanna F. Krumbholz, Vladimir Shipilin, Michael Krumbholz, David C. Tanner, and Hermann Buness
Solid Earth, 14, 871–908, https://doi.org/10.5194/se-14-871-2023, https://doi.org/10.5194/se-14-871-2023, 2023
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The geothermal carbonate reservoir below Munich, Germany, is extremely heterogeneous because it is controlled by many factors like lithology, diagenesis, karstification, and tectonic deformation. We used a 3D seismic single- and multi-attribute analysis combined with well data and a neural-net-based lithology classification to obtain an improved reservoir concept outlining its structural and diagenetic evolution and to identify high-quality reservoir zones in the Munich area.
This article is included in the Encyclopedia of Geosciences
Mengqi Wang, Lidong Dai, Haiying Hu, Ziming Hu, Chenxin Jing, Chuanyu Yin, Song Luo, and Jinhua Lai
Solid Earth, 14, 847–858, https://doi.org/10.5194/se-14-847-2023, https://doi.org/10.5194/se-14-847-2023, 2023
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This is the first time that the electrical conductivity of gabbroic melt was assessed at high temperature and high pressure. The dependence of electrical conductivity on the degree of depolymerization was also explored. Electrical conductivity of gabbroic melts can be employed to interpret high-conductivity anomalies in the Mohns Ridge of the Arctic Ocean. This is of widespread interest to potential readers in high-pressure rock physics, solid geophysics, and deep Earth science.
This article is included in the Encyclopedia of Geosciences
Laura Gaßner and Joachim Ritter
Solid Earth, 14, 785–803, https://doi.org/10.5194/se-14-785-2023, https://doi.org/10.5194/se-14-785-2023, 2023
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In this work we analyze signals emitted from wind turbines. They induce sound as well as ground motion waves which propagate through the subsurface and are registered by sensitive instruments. In our data we observe when these signals are present and how strong they are. Some signals are present in ground motion and sound data, providing the opportunity to study similarities and better characterize emissions. Furthermore, we study the amplitudes with distance to improve the signal prediction.
This article is included in the Encyclopedia of Geosciences
Gesa Franz, Marion Jegen, Max Moorkamp, Christian Berndt, and Wolfgang Rabbel
Solid Earth, 14, 237–259, https://doi.org/10.5194/se-14-237-2023, https://doi.org/10.5194/se-14-237-2023, 2023
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Our study focuses on the correlation of two geophysical parameters (electrical resistivity and density) with geological units. We use this computer-aided correlation to improve interpretation of the Earth’s formation history along the Namibian coast and the associated formation of the South Atlantic Ocean. It helps to distinguish different types of sediment cover and varieties of oceanic crust, as well as to identify typical features associated with the breakup of continents.
This article is included in the Encyclopedia of Geosciences
Jonathan Ford, Angelo Camerlenghi, Francesca Zolezzi, and Marilena Calarco
Solid Earth, 14, 137–151, https://doi.org/10.5194/se-14-137-2023, https://doi.org/10.5194/se-14-137-2023, 2023
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Submarine landslides commonly appear as low-amplitude zones in seismic data. Previous studies have attributed this to a lack of preserved internal structure. We use seismic modelling to show that an amplitude reduction can be generated even when there is still metre-scale internal structure, by simply deforming the bedding. This has implications for interpreting failure type, for core-seismic correlation and for discriminating landslides from other "transparent" phenomena such as free gas.
This article is included in the Encyclopedia of Geosciences
Sepidehalsadat Hendi, Mostafa Gorjian, Gilles Bellefleur, Christopher D. Hawkes, and Don White
Solid Earth, 14, 89–99, https://doi.org/10.5194/se-14-89-2023, https://doi.org/10.5194/se-14-89-2023, 2023
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In this study, the modelling results are used to help understand the performance of a helically wound fibre (HWC) from a field study at the New Afton mine, British Columbia. We introduce the numerical 3D model to model strain values in HWC to design more effective HWC system. The DAS dataset at New Afton, interpreted in the context of our modelling, serves as a practical demonstration of the extreme effects of surrounding media and coupling on HWC data quality.
This article is included in the Encyclopedia of Geosciences
Jérémie Giraud, Hoël Seillé, Mark D. Lindsay, Gerhard Visser, Vitaliy Ogarko, and Mark W. Jessell
Solid Earth, 14, 43–68, https://doi.org/10.5194/se-14-43-2023, https://doi.org/10.5194/se-14-43-2023, 2023
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We propose and apply a workflow to combine the modelling and interpretation of magnetic anomalies and resistivity anomalies to better image the basement. We test the method on a synthetic case study and apply it to real world data from the Cloncurry area (Queensland, Australia), which is prospective for economic minerals. Results suggest a new interpretation of the composition and structure towards to east of the profile that we modelled.
This article is included in the Encyclopedia of Geosciences
Yingkai Qi, Xuehua Chen, Qingwei Zhao, Xin Luo, and Chunqiang Feng
EGUsphere, https://doi.org/10.5194/egusphere-2022-1388, https://doi.org/10.5194/egusphere-2022-1388, 2023
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Fractures tend to dominate the mechanical and hydraulic properties of porous rock and impact the scattering characteristics of passing waves. Thus, understanding wave propagation in fractured porous rock will help to find a solution to geothermal, oil, and gas. This study takes into account the poroelastic effects of fractures in numerical modeling. Our results demonstrate the scattered waves from complex fracture system are strongly affected by the fractures for both P- and S-point sources.
This article is included in the Encyclopedia of Geosciences
Sonja H. Wadas, Hermann Buness, Raphael Rochlitz, Peter Skiba, Thomas Günther, Michael Grinat, David C. Tanner, Ulrich Polom, Gerald Gabriel, and Charlotte M. Krawczyk
Solid Earth, 13, 1673–1696, https://doi.org/10.5194/se-13-1673-2022, https://doi.org/10.5194/se-13-1673-2022, 2022
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The dissolution of rocks poses a severe hazard because it can cause subsidence and sinkhole formation. Based on results from our study area in Thuringia, Germany, using P- and SH-wave reflection seismics, electrical resistivity and electromagnetic methods, and gravimetry, we develop a geophysical investigation workflow. This workflow enables identifying the initial triggers of subsurface dissolution and its control factors, such as structural constraints, fluid pathways, and mass movement.
This article is included in the Encyclopedia of Geosciences
Mohammadkarim Karimpour, Evert Slob, and Laura Valentina Socco
Solid Earth, 13, 1569–1583, https://doi.org/10.5194/se-13-1569-2022, https://doi.org/10.5194/se-13-1569-2022, 2022
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Near-surface characterisation is of great importance. Surface wave tomography (SWT) is a powerful tool to model the subsurface. In this work we compare straight-ray and curved-ray SWT at near-surface scale. We apply both approaches to four datasets and compare the results in terms of the quality of the final model and the computational cost. We show that in the case of high data coverage, straight-ray SWT can produce similar results to curved-ray SWT but with less computational cost.
This article is included in the Encyclopedia of Geosciences
La Ode Marzujriban Masfara, Thomas Cullison, and Cornelis Weemstra
Solid Earth, 13, 1309–1325, https://doi.org/10.5194/se-13-1309-2022, https://doi.org/10.5194/se-13-1309-2022, 2022
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Induced earthquakes are natural phenomena in which the events are associated with human activities. Although the magnitudes of these events are mostly smaller than tectonic events, in some cases, the magnitudes can be high enough to damage buildings near the event's location. To study these (high-magnitude) induced events, we developed a workflow in which the recorded data from an earthquake are used to describe the source and monitor the area for other (potentially high-magnitude) earthquakes.
This article is included in the Encyclopedia of Geosciences
Evgeniia Martuganova, Manfred Stiller, Ben Norden, Jan Henninges, and Charlotte M. Krawczyk
Solid Earth, 13, 1291–1307, https://doi.org/10.5194/se-13-1291-2022, https://doi.org/10.5194/se-13-1291-2022, 2022
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We demonstrate the applicability of vertical seismic profiling (VSP) acquired using wireline distributed acoustic sensing (DAS) technology for deep geothermal reservoir imaging and characterization. Borehole DAS data provide critical input for seismic interpretation and help assess small-scale geological structures. This case study can be used as a basis for detailed structural exploration of geothermal reservoirs and provide insightful information for geothermal exploration projects.
This article is included in the Encyclopedia of Geosciences
Brij Singh, Michał Malinowski, Andrzej Górszczyk, Alireza Malehmir, Stefan Buske, Łukasz Sito, and Paul Marsden
Solid Earth, 13, 1065–1085, https://doi.org/10.5194/se-13-1065-2022, https://doi.org/10.5194/se-13-1065-2022, 2022
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Fast depletion of shallower deposits is pushing the mining industry to look for cutting-edge technologies for deep mineral targeting. We demonstrated a joint workflow including two state-of-the-art technologies: full-waveform inversion and reverse time migration. We produced Earth images with significant details which can help with better estimation of areas with high mineralisation, better mine planning and safety measures.
This article is included in the Encyclopedia of Geosciences
Felix Hloušek, Michal Malinowski, Lena Bräunig, Stefan Buske, Alireza Malehmir, Magdalena Markovic, Lukasz Sito, Paul Marsden, and Emma Bäckström
Solid Earth, 13, 917–934, https://doi.org/10.5194/se-13-917-2022, https://doi.org/10.5194/se-13-917-2022, 2022
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Methods for mineral exploration play an important role within the EU. Exploration must be environmentally friendly, cost effective, and feasible in populated areas. Seismic methods have the potential to deliver detailed images of mineral deposits but suffer from these demands. We show the results for a sparse 3D seismic dataset acquired in Sweden. The 3D depth image allows us to track the known mineralizations beyond the known extent and gives new insights into the geometry of the deposit.
This article is included in the Encyclopedia of Geosciences
Robert Jackisch, Björn H. Heincke, Robert Zimmermann, Erik V. Sørensen, Markku Pirttijärvi, Moritz Kirsch, Heikki Salmirinne, Stefanie Lode, Urpo Kuronen, and Richard Gloaguen
Solid Earth, 13, 793–825, https://doi.org/10.5194/se-13-793-2022, https://doi.org/10.5194/se-13-793-2022, 2022
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We integrate UAS-based magnetic and multispectral data with legacy exploration data of a Ni–Cu–PGE prospect on Disko Island, West Greenland. The basalt unit has a complex magnetization, and we use a constrained 3D magnetic vector inversion to estimate magnetic properties and spatial dimensions of the target unit. Our 3D modelling reveals a horizontal sheet and a strong remanent magnetization component. We highlight the advantage of UAS use in rugged and remote terrain.
This article is included in the Encyclopedia of Geosciences
Trond Ryberg, Moritz Kirsch, Christian Haberland, Raimon Tolosana-Delgado, Andrea Viezzoli, and Richard Gloaguen
Solid Earth, 13, 519–533, https://doi.org/10.5194/se-13-519-2022, https://doi.org/10.5194/se-13-519-2022, 2022
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Novel methods for mineral exploration play an important role in future resource exploration. The methods have to be environmentally friendly, socially accepted and cost effective by integrating multidisciplinary methodologies. We investigate the potential of passive, ambient noise tomography combined with 3D airborne electromagnetics for mineral exploration in Geyer, Germany. We show that the combination of the two geophysical data sets has promising potential for future mineral exploration.
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Chiara Colombero, Myrto Papadopoulou, Tuomas Kauti, Pietari Skyttä, Emilia Koivisto, Mikko Savolainen, and Laura Valentina Socco
Solid Earth, 13, 417–429, https://doi.org/10.5194/se-13-417-2022, https://doi.org/10.5194/se-13-417-2022, 2022
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Passive-source surface waves may be exploited in mineral exploration for deeper investigations. We propose a semi-automatic workflow for their processing. The geological interpretation of the results obtained at a mineral site (Siilinjärvi phosphorus mine) shows large potentialities and effectiveness of the proposed workflow.
This article is included in the Encyclopedia of Geosciences
Yueyang Xia, Dirk Klaeschen, Heidrun Kopp, and Michael Schnabel
Solid Earth, 13, 367–392, https://doi.org/10.5194/se-13-367-2022, https://doi.org/10.5194/se-13-367-2022, 2022
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Geological interpretations based on seismic depth images depend on an accurate subsurface velocity model. Reflection tomography is one method to iteratively update a velocity model based on depth error analysis. We used a warping method to estimate closely spaced data-driven depth error displacement fields. The application to a multichannel seismic line across the Sunda subduction zone illustrates the approach which leads to more accurate images of complex geological structures.
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Martin Peter Lipus, Felix Schölderle, Thomas Reinsch, Christopher Wollin, Charlotte Krawczyk, Daniela Pfrang, and Kai Zosseder
Solid Earth, 13, 161–176, https://doi.org/10.5194/se-13-161-2022, https://doi.org/10.5194/se-13-161-2022, 2022
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A fiber-optic cable was installed along a freely suspended rod in a deep geothermal well in Munich, Germany. A cold-water injection test was monitored with fiber-optic distributed acoustic and temperature sensing. During injection, we observe vibrational events in the lower part of the well. On the basis of a mechanical model, we conclude that the vibrational events are caused by thermal contraction of the rod. The results illustrate potential artifacts when analyzing downhole acoustic data.
This article is included in the Encyclopedia of Geosciences
Jean-Baptiste P. Koehl, Craig Magee, and Ingrid M. Anell
Solid Earth, 13, 85–115, https://doi.org/10.5194/se-13-85-2022, https://doi.org/10.5194/se-13-85-2022, 2022
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The present study shows evidence of fault systems (large cracks in the Earth's crust) hundreds to thousands of kilometers long and several kilometers thick extending from northwestern Russia to the northern Norwegian Barents Sea and the Svalbard Archipelago using seismic, magnetic, and gravimetric data. The study suggests that the crust in Svalbard and the Barents Sea was already attached to Norway and Russia at ca. 650–550 Ma, thus challenging existing models.
This article is included in the Encyclopedia of Geosciences
Andrei Maksymowicz, Daniela Montecinos-Cuadros, Daniel Díaz, María José Segovia, and Tomás Reyes
Solid Earth, 13, 117–136, https://doi.org/10.5194/se-13-117-2022, https://doi.org/10.5194/se-13-117-2022, 2022
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This work analyses the density structure of the continental forearc in the northern segment of the 1960 Mw 9.6 Valdivia earthquake. Results show a segmentation of the continental wedge along and perpendicular to the margin. The extension of the less rigid basement units conforming the marine wedge and Coastal Cordillera domain could modify the process of stress loading during the interseismic periods. This analysis highlights the role of the overriding plate on the seismotectonic process.
This article is included in the Encyclopedia of Geosciences
Hossein Hassani, Felix Hloušek, Stefan Buske, and Olaf Wallner
Solid Earth, 12, 2703–2715, https://doi.org/10.5194/se-12-2703-2021, https://doi.org/10.5194/se-12-2703-2021, 2021
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Passive seismic imaging methods use natural earthquakes as seismic sources, while in active seismic imaging methods, artificial sources (e.g. explosives) are used to generate seismic waves. We imaged some structures related to a major fault plane through a passive seismic imaging approach using microearthquakes with magnitudes smaller than 0.9 (Mw). These structures have not been illuminated by a previously conducted 3D active seismic survey due to their large dip angles.
This article is included in the Encyclopedia of Geosciences
Maximilian O. Kottwitz, Anton A. Popov, Steffen Abe, and Boris J. P. Kaus
Solid Earth, 12, 2235–2254, https://doi.org/10.5194/se-12-2235-2021, https://doi.org/10.5194/se-12-2235-2021, 2021
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Upscaling fluid flow in fractured reservoirs is an important practice in subsurface resource utilization. In this study, we first conduct numerical simulations of direct fluid flow at locations where fractures intersect to analyze the arising hydraulic complexities. Next, we develop a model that integrates these effects into larger-scale continuum models of fracture networks to investigate their impact on the upscaling. For intensively fractured systems, these effects become important.
This article is included in the Encyclopedia of Geosciences
Klaus Regenauer-Lieb, Manman Hu, Christoph Schrank, Xiao Chen, Santiago Peña Clavijo, Ulrich Kelka, Ali Karrech, Oliver Gaede, Tomasz Blach, Hamid Roshan, Antoine B. Jacquey, Piotr Szymczak, and Qingpei Sun
Solid Earth, 12, 1829–1849, https://doi.org/10.5194/se-12-1829-2021, https://doi.org/10.5194/se-12-1829-2021, 2021
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This paper presents a trans-disciplinary approach bridging the gap between observations of instabilities from the molecular scale to the very large scale. We show that all scales communicate via propagation of volumetric deformation waves. Similar phenomena are encountered in quantum optics where wave collisions can release sporadic bursts of light. Ocean waves show a similar phenomenon of rogue waves that seem to come from nowhere. This mechanism is proposed to be the trigger for earthquakes.
This article is included in the Encyclopedia of Geosciences
Yinshuai Ding and Alireza Malehmir
Solid Earth, 12, 1707–1718, https://doi.org/10.5194/se-12-1707-2021, https://doi.org/10.5194/se-12-1707-2021, 2021
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In this article, we investigate the potential of reverse time migration (RTM) for deep targeting iron oxide deposits and the possible AVO effect that is potentially seen in the common image gathers from this migration algorithm. The results are promising and help to delineate the deposits and host rock structures using a 2D dataset from the Ludvika mines of central Sweden.
This article is included in the Encyclopedia of Geosciences
Nikita Afonin, Elena Kozlovskaya, Suvi Heinonen, and Stefan Buske
Solid Earth, 12, 1563–1579, https://doi.org/10.5194/se-12-1563-2021, https://doi.org/10.5194/se-12-1563-2021, 2021
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In our study, we show the results of a passive seismic interferometry application for mapping the uppermost crust in the area of active mineral exploration in northern Finland. The obtained velocity models agree well with geological data and complement the results of reflection seismic data interpretation.
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Puy Ayarza, José Ramón Martínez Catalán, Ana Martínez García, Juan Alcalde, Juvenal Andrés, José Fernando Simancas, Immaculada Palomeras, David Martí, Irene DeFelipe, Chris Juhlin, and Ramón Carbonell
Solid Earth, 12, 1515–1547, https://doi.org/10.5194/se-12-1515-2021, https://doi.org/10.5194/se-12-1515-2021, 2021
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Vertical incidence seismic profiling on the Iberian Massif images a mid-crustal-scale discontinuity at the top of the reflective lower crust. This feature shows that upper- and lower-crustal reflections merge into it, suggesting that it has often behaved as a detachment. The orogen-scale extension of this discontinuity, present in Gondwanan and Avalonian affinity terranes into the Iberian Massif, demonstrates its relevance, leading us to interpret it as the Conrad discontinuity.
This article is included in the Encyclopedia of Geosciences
Peter-Lasse Giertzuch, Joseph Doetsch, Alexis Shakas, Mohammadreza Jalali, Bernard Brixel, and Hansruedi Maurer
Solid Earth, 12, 1497–1513, https://doi.org/10.5194/se-12-1497-2021, https://doi.org/10.5194/se-12-1497-2021, 2021
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Two time-lapse borehole ground penetrating radar (GPR) surveys were conducted during saline tracer experiments in weakly fractured crystalline rock with sub-millimeter fractures apertures, targeting electrical conductivity changes. The combination of time-lapse reflection and transmission GPR surveys from different boreholes allowed monitoring the tracer flow and reconstructing the flow path and its temporal evolution in 3D and provided a realistic visualization of the hydrological processes.
This article is included in the Encyclopedia of Geosciences
Irene Bianchi, Elmer Ruigrok, Anne Obermann, and Edi Kissling
Solid Earth, 12, 1185–1196, https://doi.org/10.5194/se-12-1185-2021, https://doi.org/10.5194/se-12-1185-2021, 2021
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The European Alps formed during collision between the European and Adriatic plates and are one of the most studied orogens for understanding the dynamics of mountain building. In the Eastern Alps, the contact between the colliding plates is still a matter of debate. We have used the records from distant earthquakes to highlight the geometries of the crust–mantle boundary in the Eastern Alpine area; our results suggest a complex and faulted internal crustal structure beneath the higher crests.
This article is included in the Encyclopedia of Geosciences
Saeid Cheraghi, Alireza Malehmir, Mostafa Naghizadeh, David Snyder, Lucie Mathieu, and Pierre Bedeaux
Solid Earth, 12, 1143–1164, https://doi.org/10.5194/se-12-1143-2021, https://doi.org/10.5194/se-12-1143-2021, 2021
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High-resolution seismic profiles in 2D are acquired in the north and south of the Chibougamau area, Quebec, Canada located in the northeast of the Abitibi Greenstone belt. The area mostly includes volcanic rocks, and both profiles cross over several fault zones. The seismic method is acquired to image the subsurface down to depth of 12 km. The main aim of this study is to image major fault zones and the geological formations connected to those faults to investigate metal endowment in the area.
This article is included in the Encyclopedia of Geosciences
Jean-Baptiste P. Koehl
Solid Earth, 12, 1025–1049, https://doi.org/10.5194/se-12-1025-2021, https://doi.org/10.5194/se-12-1025-2021, 2021
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By using seismic data and fieldwork, this contribution shows that soft, coal-rich sedimentary rocks absorbed most of early Cenozoic, Eurekan, contractional deformation in central Spitsbergen, thus suggesting that no contractional deformation event is needed in the Late Devonian to explain the deformation differences among late Paleozoic sedimentary rocks. It also shows that the Billefjorden Fault Zone, a major crack in the Earth's crust in Svalbard, is probably segmented.
This article is included in the Encyclopedia of Geosciences
Gilda Currenti, Philippe Jousset, Rosalba Napoli, Charlotte Krawczyk, and Michael Weber
Solid Earth, 12, 993–1003, https://doi.org/10.5194/se-12-993-2021, https://doi.org/10.5194/se-12-993-2021, 2021
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We investigate the capability of distributed acoustic sensing (DAS) to record dynamic strain changes related to Etna volcano activity in 2019. To validate the DAS measurements, we compute strain estimates from seismic signals recorded by a dense broadband array. A general good agreement is found between array-derived strain and DAS measurements along the fibre optic cable. Localised short wavelength discrepancies highlight small-scale structural heterogeneities in the investigated area.
This article is included in the Encyclopedia of Geosciences
Klaus Regenauer-Lieb, Manman Hu, Christoph Schrank, Xiao Chen, Santiago Peña Clavijo, Ulrich Kelka, Ali Karrech, Oliver Gaede, Tomasz Blach, Hamid Roshan, and Antoine B. Jacquey
Solid Earth, 12, 869–883, https://doi.org/10.5194/se-12-869-2021, https://doi.org/10.5194/se-12-869-2021, 2021
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In this paper we expand on a recent discovery of slow cross-diffusion hydromechanical waves cast into a new concise reaction–diffusion equation for THMC coupling. If waves are excited through the THMC reaction terms unbounded reactions can be captured by inclusion of statistical information from the lower scale through nonlocal reaction–diffusion equations. These cross-diffusion coefficients regularize extreme earthquake-like events (rogue waves) through a new form of quasi-soliton wave.
This article is included in the Encyclopedia of Geosciences
Christian Emile Nyaban, Théophile Ndougsa-Mbarga, Marcelin Bikoro-Bi-Alou, Stella Amina Manekeng Tadjouteu, and Stephane Patrick Assembe
Solid Earth, 12, 785–800, https://doi.org/10.5194/se-12-785-2021, https://doi.org/10.5194/se-12-785-2021, 2021
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A multi-scale analysis of aeromagnetic data combining tilt derivative, Euler deconvolution, upward continuation, and 2.75D modelling was applied over Cameroon between the latitudes 5°30'–6° N and the longitudes 13°30'–14°45' E. Major families of faults oriented ENE–WSW, E–W, NW–SE, and N–S with a NE–SW prevalence were mapped. Depths of interpreted faults range from 1000 to 3400 m, mylonitic veins were identified, and 2.75D modelling revealed fault depths greater than 1200 m.
This article is included in the Encyclopedia of Geosciences
Jennifer E. Cunningham, Nestor Cardozo, Chris Townsend, and Richard H. T. Callow
Solid Earth, 12, 741–764, https://doi.org/10.5194/se-12-741-2021, https://doi.org/10.5194/se-12-741-2021, 2021
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This work investigates the impact of commonly used seismic interpretation methods on the analysis of faults. Fault analysis refers to fault length, displacement, and the impact these factors have on geological modelling and hydrocarbon volume calculation workflows. This research was conducted to give geoscientists a better understanding of the importance of interpretation methods and the impact of unsuitable methology on geological analyses.
This article is included in the Encyclopedia of Geosciences
Jan Henninges, Evgeniia Martuganova, Manfred Stiller, Ben Norden, and Charlotte M. Krawczyk
Solid Earth, 12, 521–537, https://doi.org/10.5194/se-12-521-2021, https://doi.org/10.5194/se-12-521-2021, 2021
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We performed a seismic survey in two 4.3 km deep geothermal research wells using the novel method of distributed acoustic sensing and wireline cables. The characteristics of the acquired data, methods for data processing and quality improvement, and interpretations on the geometry and structure of the sedimentary and volcanic reservoir rocks are presented. The method enables measurements at high temperatures and reduced cost compared to conventional sensors.
This article is included in the Encyclopedia of Geosciences
Matthias Bücker, Adrián Flores Orozco, Jakob Gallistl, Matthias Steiner, Lukas Aigner, Johannes Hoppenbrock, Ruth Glebe, Wendy Morales Barrera, Carlos Pita de la Paz, César Emilio García García, José Alberto Razo Pérez, Johannes Buckel, Andreas Hördt, Antje Schwalb, and Liseth Pérez
Solid Earth, 12, 439–461, https://doi.org/10.5194/se-12-439-2021, https://doi.org/10.5194/se-12-439-2021, 2021
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We use seismic, electromagnetic, and geoelectrical methods to assess sediment thickness and lake-bottom geology of two karst lakes. An unexpected drainage event provided us with the unusual opportunity to compare water-borne measurements with measurements carried out on the dry lake floor. The resulting data set does not only provide insight into the specific lake-bottom geology of the studied lakes but also evidences the potential and limitations of the employed field methods.
This article is included in the Encyclopedia of Geosciences
Alireza Malehmir, Magdalena Markovic, Paul Marsden, Alba Gil, Stefan Buske, Lukasz Sito, Emma Bäckström, Martiya Sadeghi, and Stefan Luth
Solid Earth, 12, 483–502, https://doi.org/10.5194/se-12-483-2021, https://doi.org/10.5194/se-12-483-2021, 2021
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A smooth transition toward decarbonization demands access to more minerals of critical importance. Europe has a good geology for many of these mineral deposits, but at a depth requiring sensitive, environmentally friendly, and cost-effective methods for their exploration. In this context, we present a sparse 3D seismic dataset that allowed identification of potential iron oxide resources at depth and helped to characterise key geological structures and a historical tailing in central Sweden.
This article is included in the Encyclopedia of Geosciences
Alba Zappone, Antonio Pio Rinaldi, Melchior Grab, Quinn C. Wenning, Clément Roques, Claudio Madonna, Anne C. Obermann, Stefano M. Bernasconi, Matthias S. Brennwald, Rolf Kipfer, Florian Soom, Paul Cook, Yves Guglielmi, Christophe Nussbaum, Domenico Giardini, Marco Mazzotti, and Stefan Wiemer
Solid Earth, 12, 319–343, https://doi.org/10.5194/se-12-319-2021, https://doi.org/10.5194/se-12-319-2021, 2021
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The success of the geological storage of carbon dioxide is linked to the availability at depth of a capable reservoir and an impermeable caprock. The sealing capacity of the caprock is a key parameter for long-term CO2 containment. Faults crosscutting the caprock might represent preferential pathways for CO2 to escape. A decameter-scale experiment on injection in a fault, monitored by an integrated network of multiparamerter sensors, sheds light on the mobility of fluids within the fault.
This article is included in the Encyclopedia of Geosciences
Juvenal Andrés, Puy Ayarza, Martin Schimmel, Imma Palomeras, Mario Ruiz, and Ramon Carbonell
Solid Earth, 11, 2499–2513, https://doi.org/10.5194/se-11-2499-2020, https://doi.org/10.5194/se-11-2499-2020, 2020
Yi Zhang, Xinglin Lei, Tsutomu Hashimoto, and Ziqiu Xue
Solid Earth, 11, 2487–2497, https://doi.org/10.5194/se-11-2487-2020, https://doi.org/10.5194/se-11-2487-2020, 2020
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Spatially continuous strain responses in two monitoring wells induced by a well-drilling process were monitored using high-resolution fiber-optic distributed strain sensing (DSS). The modeling results suggest that the strain polarities and magnitudes along the wellbores may be indicative of the layered-permeability structure or heterogeneous formation damage. The performance and value of DSS as a novel hydrogeophysical tool for in situ subsurface monitoring are emphasized.
This article is included in the Encyclopedia of Geosciences
Benjamin Schwarz and Charlotte M. Krawczyk
Solid Earth, 11, 1891–1907, https://doi.org/10.5194/se-11-1891-2020, https://doi.org/10.5194/se-11-1891-2020, 2020
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Intricate fault and fracture networks cut through the upper crust, and their detailed delineation and characterization play an important role in the Earth sciences. While conventional geophysical sounding techniques only provide indirect means of detection, we present scale-spanning field data examples, in which coherent diffraction imaging – a framework inspired by optics and visual perception – enables the direct imaging of these crustal features at an unprecedented spatial resolution.
This article is included in the Encyclopedia of Geosciences
Laurent Guillou-Frottier, Hugo Duwiquet, Gaëtan Launay, Audrey Taillefer, Vincent Roche, and Gaétan Link
Solid Earth, 11, 1571–1595, https://doi.org/10.5194/se-11-1571-2020, https://doi.org/10.5194/se-11-1571-2020, 2020
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In the first kilometers of the subsurface, temperature anomalies due to heat conduction rarely exceed 20–30°C. However, when deep hot fluids in the shallow crust flow upwards, for example through permeable fault zones, hydrothermal convection can form high-temperature geothermal reservoirs. Numerical modeling of hydrothermal convection shows that vertical fault zones may host funnel-shaped, kilometer-sized geothermal reservoirs whose exploitation would not need drilling at depths below 2–3 km.
This article is included in the Encyclopedia of Geosciences
Joseph Doetsch, Hannes Krietsch, Cedric Schmelzbach, Mohammadreza Jalali, Valentin Gischig, Linus Villiger, Florian Amann, and Hansruedi Maurer
Solid Earth, 11, 1441–1455, https://doi.org/10.5194/se-11-1441-2020, https://doi.org/10.5194/se-11-1441-2020, 2020
Laura Petrescu, Silvia Pondrelli, Simone Salimbeni, Manuele Faccenda, and the AlpArray Working Group
Solid Earth, 11, 1275–1290, https://doi.org/10.5194/se-11-1275-2020, https://doi.org/10.5194/se-11-1275-2020, 2020
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To place constraints on the mantle deformation beneath the Central Alps and the greater Alpine region, we analysed the appropriate seismic signal recorded by more than 100 stations, belonging to AlpArray and to other permanent networks. We took a picture of the imprinting that Alpine orogen history and related subductions left at depth, with a mainly orogen-parallel mantle deformation from Western Alps to Eastern Alps, but also N to S from the Po Plain to the Rhine Graben.
This article is included in the Encyclopedia of Geosciences
Łukasz Słonka and Piotr Krzywiec
Solid Earth, 11, 1097–1119, https://doi.org/10.5194/se-11-1097-2020, https://doi.org/10.5194/se-11-1097-2020, 2020
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This paper shows the results of seismic interpretations that document the presence of large Upper Jurassic carbonate buildups in the Miechów Trough (S Poland). Our work fills the gap in recognition of the Upper Jurassic carbonate depositional system of southern Poland. The results also provide an excellent generic reference point, showing how and to what extent seismic data can be used for studies of carbonate depositional systems, in particular for the identification of the carbonate buildups.
This article is included in the Encyclopedia of Geosciences
Cited articles
Achtziger-Zupančič, P., Loew, S., and Mariéthoz, G.: A new global database to improve predictions of permeability distribution in crystalline rocks at site scale, J. Geophys. Res.-Sol. Ea., 122, 3513–3539, 2017.
Adams, B. M., Kuehn, T. H., Bielicki, J. M., Randolph, J. B., and Saar, M. O.: On the importance of the thermosiphon effect in CPG (CO2 Plume Geothermal) power systems, Energy, 69, 409–418, https://doi.org/10.1016/j.energy.2014.03.032, 2014.
Adams, B. M., Kuehn, T. H., Bielicki, J. M., Randolph, J. B., and Saar, M. O.: A Comparison of Electric Power Output of CO2 Plume Geothermal (CPG) and Brine Geothermal Systems for Varying Reservoir Conditions, Appl. Energ., 140, 365–377, https://doi.org/10.1016/j.apenergy.2014.11.043, 2015.
Ake, J., Mahrer, K., O'Connell, D., and Block, L.: Deep-Injection and Closely Monitored Induced Seismicity at Paradox Valley, Colorado, B. Seismol. Soc. Am., 95, 664–683, https://doi.org/10.1785/0120040072, 2005.
Amitrano, D.: Variability in the power-law distributions of rupture events, Eur. Phys. J. Spec. Top., 205, 199–215, 2012.
Amitrano, D. and Schmittbuhl, J.: Fracture roughness and gouge distribution of a granite shear band, J. Geophys. Res., 107, 2375, https://doi.org/10.1029/2002JB001761, 2002.
Asanuma, H., Soma, N., Kaieda, H., Kumano, Y., Izumi, T., Tezuka, K., Niitsuma, H., and Wyborn, D.: Microseismic monitoring of hydraulic stimulation at the Australian HDR project in Cooper Basin, in: Proceedings World Geothermal Congress, 24–29 April 2005, Antalya, Turkey, 24–29, 2005.
Bachmann, C. E., Wiemer, S., Woessner, J., and Hainzl, S.: Statistical analysis of the induced Basel 2006 earthquake sequence: Introducing a probability-based monitoring approach for Enhanced Geothermal Systems, Geophys. J. Int., 186, 793–807, https://doi.org/10.1111/j.1365-246X.2011.05068.x, 2011.
Bachmann, C. E., Wiemer, S., Goertz-Allmann, B. P., and Woessner, J.: Influence of pore pressure on the size distribution of induced earthquakes, Geophys. Res. Lett., 39, L09302, https://doi.org/10.1029/2012GL051480, 2012.
Baisch, S. and Harjes, H. P.: A model for fluid-injection-induced seismicity at the KTB, Germany, Geophys. J. Int., 152, 160–170, 2003.
Baisch, S., Weidler, R., Vörös, R., Wyborn, D., and DeGraaf, L.: Induced seismicity during the stimulation of a geothermal HFR reservoir in the Cooper Basin (Australia), B. Seismol. Soc. Am., 96, 2242–2256, 2006.
Baisch, S., Vörös, R., Weidler, R., and Wyborn, D.: Investigation of fault mechanisms during geothermal reservoir stimulation experiments in the Cooper Basin (Australia), B. Seismol. Soc. Am., 99, 148–158, 2009.
Baisch, S., Vörös, R., Rothert, E., Stang, H., Jung, R., and Schellschmidt, R.: A numerical model for fluid injection induced seismicity at Soutz-sous-Forêt, Int. J. Rock Mech. Min., 47, 405–413, 2010.
Baisch, S., Rothert, E., Stang, H., Vörös, R., Koch, C., and McMahon, A.: Continued Geothermal Reservoir Stimulation Experiments in the Cooper Basin (Australia), B. Seismol. Soc. Am., 105, 198–209, 2015.
Bandis, S., Lumsden, A. C., and Barton, N. R.: Fundamentals of rock joint deformation, Int. J. Rock Mech. Min., 20, 249–268, 1983.
Bao, X. and Eaton, D. W.: Fault activation by hydraulic fracturing in western Canada, Science, 354, 1406–1409, https://doi.org/10.1126/science.aag2583, 2016.
Barton, C. A., Zoback, M. D., and Moos, D.: Fluid-flow along potentially active faults in crystalline rock, Geology, 23, 683–686, 1995.
Barton, C. A., Hickman, S., Morin, R., Zoback, M. D., and Benoit, R.: Reservoir-scale fracture permeability in the Dixie Valley, Nevada, Geothermal Field, in: Proceedings of the Twenty-Third Workshop on Geothermal Reservoir Engineering, 26–28 January 1998, Stanford, USA, Society of Petroleum Engineering, 299–306, 1998.
Batchelor, A. S., Baria, R., and Hearn, K.: Monitoring the effects of hydraulic stimulation by microseismic event location: a case study, in: Proceedings of the 58th Ann. Tech. Conf. and Exhibition of SPE, 5–8 October 1983, San Francisco, USA, Society of Petroleum Engineers, 1983.
Baujard, C. and Bruel, D.: Numerical study of the impact of fluid density on the pressure distribution and stimulated volume in the Soultz HDR reservoir, Geothermics, 35, 607–621, 2006.
Bennour, Z., Ishida, T., Nagaya, Y., Chen, Y., Nara, Y., Chen, Q., Sekine, K., and Nagano, Y.: Crack extension in hydraulic fracturing of shale cores using viscous oil, water, and liquid carbon dioxide, Rock Mech. Rock Eng., 48, 1463–1473, 2015.
Biot, M. A.: General theory of three dimensional consolidation, J. Appl. Phys., 12, 155–164, 1941.
Blake, K. and Davatzes, N.: Crustal stress heterogeneity in the vicinity of COCO geothermal field, CA, in: Proceedings of the 36th Workshop on Geothermal Reservoir Engineering, 31 January–2 February, 2011, Stanford, USA, 2011.
Block, L., Wood, C., Yeck, W., and King, V.: Induced seismicity constraints on subsurface geological structure, Paradox Valley, Colorado, Geophys. J. Int., 200, 1170–1193, https://doi.org/10.1093/gji/ggu459, 2015.
Bommer, J. J., Oates, S., Cepeda, J. M., Lindholm, C., Bird, J., Torres, R., Marroquín, G., and Rivas, J.: Control of hazard due to seismicity induced by a hot fractured rock geothermal project, Eng. Geol., 83, 287–306, 2006.
Boroumand, N. and Eaton, D.: Comparing Energy Calculations – Hydraulic Fracturing and Microseismic Monitoring, in: Proceedings of the 74th EAGE Conference and Exhibition incorporating Europec 2012 (GeoConvention), 4 June 2012, Copenhagen, Denmark, 2012.
Breede, K., Dzebisashvili, K., Liu, X., and Falcone, G.: A systematic review of enhanced (or engineered) geothermal systems: past, present and future, Geothermal Energy, 1, 4, https://doi.org/10.1186/2195-9706-1-4, 2013.
Brown, D. W.: A hot dry rock geothermal energy concept utilizing supercritical CO2 instead of water, in: Proceedings of the Twenty-Fifth Workshop on Geothermal Reservoir Engineering, 24–26 January 2000, Stanford, USA, 2000.
Brown, D. W., Duchane, D. V., Heiken, G., and Hriscu, V. T.: Mining the Earth's heat: hot dry rock geothermal energy, Vol. 1, Springer Science & Business Media, Berlin Heidelberg, Germany, 658 pp., 2012.
Bruno, M. S. and Nakagawa, F.: Pore pressure influence on tensile fracture propagation in sedimentary rock, Int. J. Rock Mech. Min., 28, 261–273, https://doi.org/10.1016/0148-9062(91)90593-B, 1991.
Bunger, A., Detournay, E., Garagash, D., and Peirce, A.: Numerical simulation of hydraulic fracturing in the viscosity dominated regime, in: Proceedings of the SPE Hydraulic Fracturing Technology Conference, 29–31 January 2007, Texas, USA, Society of Petroleum Engineers, 2007.
Bunger, A. P., Jeffrey, R. G., Kear, J., and Zhang, X.: Experimental Investigation of the Interaction among Closely Spaced Hydraulic Fractures, in: Proceedings of the 45th US Rock Mech./Geomechanics Symposium, 26–29 June 2011, San Francisco, USA, American Rock Mech. Association, 2011.
Buscheck, T. A., Bielicki, J. M., Edmunds, T. A., Hao, Y., Sun, Y., Randolph, Y. B., and Saar, M. O.: Multifluid geo-energy systems: Using geologic CO2 storage for geothermal energy production and grid-scale energy storage in sedimentary basins, Geosphere, 12, 678–696, https://doi.org/10.1130/GES01207.1, 2016.
Byerlee, J.: Friction of rocks, Pure Appl. Geophys., 116, 615–626, 1978.
Caine, J. S., Evans, J. P., and Forster, C. B.: Fault zone architecture and permeability structure, Geology, 24, 1025–1028, 1996.
Calò, M., Dorbath, C., Cornet, F. H., and Cuenot, N.: Large-scale aseismic motion identified through 4-DP-wave tomography, Geophys. J. Int., 186, 1295–1314, 2011.
Candela, T., Brodsky, E. E., Marone, C., and Elsworth, D.: Laboratory evidence for particle mobilization as a mechanism for permeability enhancement via dynamic stressing, Earth Planet. Sc. Lett., 392, 279–291, 2014.
Cappa, F., Guglielmi, Y., Rutqvis, J., Tsang, C.-F., and Thoraval, A.: Hydromechanical modeling of pulse tests that measure fluid pressure and fracture normal displacement at the Coaraze Laboratory site, France, Int. J. Rock Mech. Min., 43, 1062–1082, 2006.
Catalli, F., Meier, M.-A., and Wiemer, S.: Coulomb stress changes at the Basel geothermal site: can the Coulomb model explain induced seismicity in an EGS?, Geophys. Res. Lett., 40, 72–77, https://doi.org/10.1029/2012GL054147, 2013.
Chacón, E., Barrera, V., Jeffrey, R., and van As, A.: Hydraulic fracturing used to precondition ore and reduce fragment size for block caving, in: Proceedings of the MassMin, 22–25 August 2004, Santiago, Chile, Instituto de Ingenieuros, 2004.
Chen, Z., Narayan, S. P., Yang, Z., and Rahman, S. S.: An experimental investigation of hydraulic behaviour of fractures and joints in granitic rock, Int. J. Rock Mech. Min., 37, 1061–1071, 2000.
Chitrala, Y., Moreno, C., Sondergeld, C. H., and Rai, C. S.: Microseismic mapping of laboratory induced hydraulic fractures in anisotropic reservoirs, in: Proceedings of the Tight Gas Completions Conference, Antonio, USA, 2–3 November 2010, Society of Petroleum Engineers, 2010.
Cornet, F. H. and Desroches, J.: The problem of channeling in Hot Dry Rock reservoirs, in: Hot Dry Rock Geothermal Energy, Robertson Scientific Publishers, Llandudno Cornwall, UK, 398–421, 1989.
Cornet, F. H. and Jones, R. H.: Field evidence on the orientation of forced water flow with respect to the regional principal stress directions, in. Proceedings of the 1st North American Rock Mechanics Symposium, 1–3 June 1994, Austin, USA, 61–69, 1994.
Cornet, F. H. and Scotti, O.: Analysis of induced seismicity for fault zone identification, Int. J. Rock Mech. Min., 30, 789–795, 1993.
Cornet, F. H., Helm, J., Poitrenaud, H., and Etchecopar, A.: Seismic and Aseismic Slips Induced by Large-scale Fluid Injections, Pure Appl. Geophys., 150, 563–583, 1997.
Cornet, F. H., Li, L., Hulin, J.-P., Ippolito, I., and Kurowski, P.: The hydromechanical behaviour of a fracture: an in situ experimental case study, Int. J. Rock Mech. Min., 40, 1257–1270, 2003.
Das, I. and Zoback, M. D.: Long-period, long-duration seismic events during hydraulic fracture stimulation of a shale gas reservoir, The Leading Edge, 30, 778–786, https://doi.org/10.1190/1.3609093, 2011.
Davies, R., Foulger, G., Bindley, A., and Styles, P.: Induced seismicity and hydraulic fracturing for the recovery of hydrocarbons, Mar. Petrol. Geol., 45, 171–185, 2013.
Deichmann, N. and Ernst, J.: Earthquake focal mechanisms of the induced seismicity in 2006 and 2007 below Basel (Switzerland), Swiss J. Geosci., 102, 457–466, 2009.
Deichmann, N., Kraft, T., and Evans, K. F.: Identification of faults activated during the stimulation of the Basel geothermal project from cluster analysis and focal mechanisms of the larger magnitude events, Geothermics, 52, 84–97, 2014.
Derode, B., Cappa, F., Guglielmi, Y., and Rutqvist, J.: Coupled seismo-hydromechanical monitoring of inelastic effects on injection-induced fracture permeability, Int. J. Rock Mech. Min., 61, 266–274, 2013.
Detournay, E.: Mechanics of Hydraulic Fractures, Annu. Rev. Fluid Mech., 48, 311–339, 2016.
Doe, T. W. and Boyce, G.: Orientation of hydraulic fractures in salt under hydrostatic and non-hydrostatic stress, Int. J. Rock Mech. Min., 26, 605–611, 1989.
Dusseault, M. B., McLennan, J., and Shu, J.: Massive multi-stage hydraulic fracturing for oil and gas recovery from low mobility reservoirs in China, Petroleum Drilling Techniques, 39, 6–16, 2011.
Edwards, B., Kraft, T., Cauzzi, C., Kaestli, P., and Wiemer, S.: Seismic monitoring and analysis of deep geothermal projects in St Gallen and Basel, Switzerland, Geophys. J. Int., 201, 1020–1037, 2015.
Ellsworth, W. L.: Injection-induced earthquakes, Science, 12, 1225942, https://doi.org/10.1126/science.1225942, 2013.
Elsworth, D., Fang, Y., Gan, Q., Im, K. J., Ishibashi, T., and Guglielmi, Y.: Induced seismicity in the development of EGS – benefits and drawbacks, in: Rock Dynamics: From Research to Engineering, CRC Press, Suzhou, China, 13–24, 2016.
Emmermann, R. and Lauterjung, J.: The German Continental Deep Drilling Program KTB: Overview and major results, J. Geophys. Res., 102, 18179–18201, https://doi.org/10.1029/96jb03945, 1997.
Esaki, T., Hojo, H., Kimura, T., and Kameda, N.: Shear-Flow Coupling Test on Rock joints, in: Proceedings of the Seventh International Congress on Rock Mech., Vol. 1: Rock Mechanics and Environmental Protection, 16–20 September 1991, Aachen, Germany, International Society for Rock Mechanics and Rock Engineering, 1991.
Esaki, T., Du, S., Mitani, Y., Ikusada, K., and Jing, L.: Development of a shear-flow test apparatus and determination of coupled properties for a single rock joint, Int. J. Rock Mech. Min., 36, 641–650, 1999.
Evans, K. F.: Some examples and implications of observed elastic deformations associated with the growth of hydraulic fractures in the Earth, in: Hydraulic Fracturing Stress Measurements, edited by: Zoback, M. D. and Haimson, B. C., National Academy Press, Monterey, USA, 246–259, 1983.
Evans, K. F.: Does significant aseismic slip occur on fractures in HDR systems under stimulation conditions?, Proceedings, 4th Int. HDR Forum, 28–30 September 1998, Strasbourg, France, 1998.
Evans, K. F.: Permeability creation and damage due to massive fluid injections into granite at 3.5 km at Soultz: 2. Critical stress and fracture strength, J. Geophys. Res.-Atmos., 110, 1–14, 2005.
Evans, K. F.: Reservoir Creation, in: Energy from the Earth – Deep Geothermal as a Resource for the Future?, edited by: Hirschberg, S., Wiemer, S. and Burgherr, P., Zentrum für Technologiefolgen-Abschätzung, Bern, Switzerland, 82–118, 2014.
Evans, K. and Holzhausen, G.: On the development of shallow hydraulic fractures as viewed through the surface deformation field: Part 2 – case histories, J. Petrol. Technol., 35, 411–420, 1983.
Evans, K. F. and Meier, P.: Hydro-jacking and hydrofracturing tests in a fissile schist in south-west Switzerland: In-situ stress characterisation in difficult rock, in: Proceedings of the 2nd Int. Conf. on the Mechanics of Jointed and Faulted Rock, 10–14 April 1995, Vienna, Austria, 1995.
Evans, K. F. and Sikaneta, S.: Characterisation of natural fractures and stress in the Basel reservoir from wellbore observations (Module 1), in: GEOTHERM – Geothermal Reservoir Processes: Research towards the creation and sustainable use of Enhanced Geothermal Systems, Swiss Federal Office of Energy Publication, Bern, Switzerland, 290900, 9–18, 2013.
Evans, K. F. and Wyatt, F.: Water table effects on the measurement of earth strain, Tectonophysics, 108, 323–337, 1984.
Evans, K. F., Kohl, T., Rybach, L., and Hopkirk, R. J.: The effect of fracture normal compliance on the long-term circulation behaviour of a hot dry rock reservoir: A parameter study using the new fully coupled code fracture, Geoth. Res. T., 16, 449–456, 1992.
Evans, K. F., Cornet, F. H., Hashida, T., Hayashi, K., Ito, T., Matsuki, K., and Wallroth, T.: Stress and rock mechanics issues of relevance to HDR/HWR engineered geothermal systems: review of developments during the past 15 years, Geothermics, 28, 455–474, 1999.
Evans, K. F., Moriya, H., Niitsuma, H., Jones, R. H., Phillips, W. S., Genter, A., Sausse, J., Jung, R., and Baria, R.: Microseismicity and permeability enhancement of hydrogeologic structures during massive fluid injections into granite at 3 km depth at the Soultz HDR site, Geophys. J. Int., 160, 388–412, 2005a.
Evans, K. F., Genter, A., and Sausse, J.: Permeability creation and damage due to massive fluid injections into granite at 3.5 km at Soultz: 1. Borehole observations, J. Geophys. Res., 110, B04203, https://doi.org/10.1029/2004JB003168, 2005b.
Evans, K. F., Zappone, A., Kraft, T., Deichmann, N., and Moia, F.: A survey of the induced seismic responses to uid injection in geothermal and CO2 reservoirs in Europe, Geothermics, 41, 30–54, 2012.
Evans, K., Wieland, U., Wiemer, S., and Giardini D.: Deep Geothermal Energy R&D Roadmap for Switzerland, Swiss Competence Centers for Energy Research, Zurich, Switzerland, 1–43, 2014.
Eyre, T. S. and van der Baan, M.: Overview of moment-tensor inversion of microseismic events, The Leading Edge, 34, 882–888, https://doi.org/10.1190/tle34080882.1, 2015.
Fang, Y., Elsworth, D., Wang, C., Ishibashi, T., and Fitts, J. P.: Frictional stability-permeability relationships for fractures in shales, J. Geophys. Res.-Sol. Ea., 122, 1760–1776, 2017.
Fang, Y., Elsworth, D., and Cladouhos, T. T.: Reservoir permeability mapping using microearthquake data, Geothermics, 72, 83–100, 2018.
Faulkner, D. R. and Rutter, E. H.: Can the maintenance of overpressured fluids in large strike-slip fault zones explain their apparent weakness?, Geology, 29, 503–506, 2008.
Faulkner, D. R., Jackson, C., Lunn, R., Schlische, R., Shipton, Z., Wibberley, C., and Withjack, M.: A review of recent developments concerning the structure, mechanics and fluid flow properties of fault zones, J. Struct. Geol., 32, 1557–1575, 2010.
Gale, J. E.: A numerical, field and laboratory study of flow in rocks with deformable fractures, PhD, University of California, Berkeley, USA, 255 pp., 1975.
Gale, J. E.: Fracture properties from laboratory and large scale field tests: evidence of scale effects, in: Scale Effects in Rock Masses. Proc. 2nd Int. Workshop on Scale Effects in Rock Masses, 25 June 1993, Lisbon, Protugal, 341–352, 1993.
Garagash, D. I. and Germanovich, L. N.: Nucleation and arrest of dynamic slip on a pressurized fault, J. Geophys. Res., 117, B10310, https://doi.org/10.1029/2012JB009209, 2012.
Garapati, N., Randolph, J. B., and Saar, M. O.: Brine displacement by CO2, energy extraction rates, and lifespan of a CO2-limited CO2 Plume Geothermal (CPG) system with a horizontal production well, Geothermics, 55, 182–194, https://doi.org/10.1016/j.geothermics.2015.02.005, 2015.
Garcia, J., Walters, M., Beall, J., Hartline, C., Pingol, A., Pistone, S., and Wright, M.: Overview of the northwest Geysers EGS demonstration project, in: Proceedings of the Thirty-Seventh Workshop on Geothermal Reservoir Engineering, 30 January–1 February 2012, Stanford, USA, 2012.
Gentier, S., Hopkins, D., and Riss, J.: Role of fracture geometry in the evolution of flow paths under stress, in: Dynamics of Fluids in Fractured Rock, Geophys. Monogr. Ser., vol. 122, edited by: Faybishenko, B., Witherspoon, P. A., and Benson, S. M., AGU, Washington, D.C., USA, 169–184, 2000.
Giardini, D.: Geothermal quake risks must be faced, Nature, 462, 848–849, 2009.
Gischig, V. S.: Rupture propagation behavior and the largest possible earthquake induced by fuid injection into deep reservoirs, Geophys. Res. Lett., 42, 7420–7428, 2015.
Gischig, V. S. and Preisig, G.: Hydro-fracturing versus hydro-shearing: a critical assessment of two distinct reservoir stimulation mechanisms, in: Proceedings of the International Congress of Rock Mechanics, 10–13 May 2015, Montréal, Canada, International Society for Rock Mech. and Rock Engineering, 2015.
Gischig, V. S. and Wiemer, S.: A stochastic model for induced seismicity based on non-linear pressure diffusion and irreversible permeability enhancement, Geophys. J. Int., 194, 1229–1249, 2013.
Gischig, V. S., Wiemer, S., and Alcolea, A. R.: Balancing reservoir creation and seismic hazard in enhanced geothermal systems, Geophys. J. Int., 198, 1585–1598, https://doi.org/10.1093/gji/ggu221, 2014.
Gischig, V. S., Jalali, M., Amann, F., Krietsch, H., Klepikova, M., Esposito, S., Broccardo, M., Obermann, A., Mignan, A., Doetsch, J., and Madonna, C.: Impact of the ISC Experiment at the Grimsel Test Site-Assessment of Potential Seismic Hazard and Disturbances to Nearby Experiments and KWO Infrastructure, ETH Zurich, https://doi.org/10.3929/ethz-b-000189973, 2016.
Gischig, V. S., Doetsch, J., Maurer, H., Krietsch, H., Amann, F., Evans, K. F., Nejati, M., Jalali, M., Valley, B., Obermann, A. C., Wiemer, S., and Giardini, D.: On the link between stress field and small-scale hydraulic fracture growth in anisotropic rock derived from microseismicity, Solid Earth, 9, 39–61, https://doi.org/10.5194/se-9-39-2018, 2018.
Goebel, T. H. W., Becker, T. W., Schorlemmer, D., Stanchits, S., Sammis, C., Rybacki, E., and Dresen, G.: Identifying fault heterogeneity through mapping spatial anomalies in acoustic emission statistics, J. Geophys. Res., 117, B03310, https://doi.org/10.1029/2011JB008763, 2012.
Goertz-Allmann, B. P. and Wiemer, S.: Geomechanical modeling of induced seismicity source parameters and implications for seismic hazard assessment, Geophysics, 78, KS25–KS39, 2013.
Goertz-Allmann, B. P., Goertz, A., and Wiemer, S.: Stress drop variations of induced earthquakes at the Basel geothermal site, Geophys. Res. Lett. 38, L09308, https://doi.org/10.1029/2011GL047498, 2011.
Goodman, R. E.: The mechanical properties of joints, in: Proceedings of the 3rd Int. Congr. International Society of Rock Mechanics, 1–7 September 1974, Denver, USA, National Academy of Sciences, 127–140, 1974.
Guglielmi, Y., Cappa, F., Rutqvist, J., Tsang, C.-F., and Thoraval, A.: Field and numerical investigations of free-water surface oscillation effects on rock slope hydromechanical behaviour – consequences for rock slope stability analyses, in: Proceedings of the GEOPROC 2006: 2nd International Conference on Coupled Thermo-hydro-mechanical-chemical processes in geosystems & engineering, May 2006, Nanjing, China, 174–182, 2006.
Guglielmi, Y., Cappa, F., Rutqvist, J., Tsang, C.-F., and Thoraval, A.: Mesoscale characterization of coupled hydromechanical behavior of a fractured-porous slope in response to free water-surface movement, Int. J. Rock. Mech. Min., 42, 852–878, 2008.
Guglielmi, Y., Cappa, F., Lancon, H., Janowczyk, J. B., Rutqvist, J., Tsang, C. F., and Wang, J. S. Y.: ISRM Suggested Method for Step-Rate Injection Method for Fracture In-Situ Properties (SIMFIP): Using a 3-Components Borehole Deformation Sensor, Rock Mech. Rock Eng., 47, 303–311, 2014.
Guglielmi, Y., Cappa, F., Avouac, J.-P., Henry, P., and Elsworth, D.: Seismicity triggered by fuid injection induced aseismic slip, Science, 348, 1224–1226, 2015a.
Guglielmi, Y., Henry, P. Nussbaum, C., Dick, P., Gout, C., and Amann, F.: Underground Research Laboratories for conducting fault activation experiments in shales, in: Proceedings of the 49th US Rock Mech./Geomechanics Symposium, 28 June–1 July 2015, San Francisco, USA, American Rock Mechanics Association, 2015b.
Gupta, H. K.: Reservoir-induced Earthquakes, vol. 64, Elsevier, Amsterdam, the Netherlands, 382 pp., 1992.
Haimson, B. C. and Cornet, F. H.: ISRM suggested methods for rock stress estimation – Part 3: hydraulic fracture (HF) and/or hydraulic testing of pre-existing fractures (HTPF), Int. J. Rock Mech. Min., 40, 1011–1020, 2003.
Hampton, J. C., Matzar, L., Hu, D., and Gutierrez, M.: Fracture dimension investigation of laboratory hydraulic fracture interaction with natural discontinuity using acoustic emission, in: Proceedings of the 49th US Rock Mech./Geomechanics Symposium, 28 June–1 July 2015, San Francisco, USA, American Rock Mech. Association, 2015.
Häring, M. O., Schanz, U., Ladner, F., and Dyer, B. C.: Characterization of the Basel 1 enhanced geothermal system, Geothermics, 37, 469–495, 2008.
Healy, J. H., Rubey, W. W., Griggs, D. T., and Raleigh, C. B.: The Denver earthquakes, Science, 161, 1301–1310, 1968.
Hickman, S. H., Zoback, M. D., and Benoit, R.: Tectonic controls on fault-zone permeability in a geothermal reservoir at Dixie Valley, Nevada, in: Proceedings of the SPE/ISRM Eurock '98, 8–10 July 1998, Trondheim, Norway, Society of Petroleum Engineering, 1998.
Hickman, S. H., Zoback, M. D., Barton, C. A., Benoit, R., Svitek, J., and Summer, R.: Stress and permeability heterogeneity within the Dixie Valley geothermal reservoir: recent results from well 82-5, in: Proceedings of the Twenty-Fifth Workshop on Geothermal Reservoir Engineering, 24–26 January 2000, Stanford, USA, 2000.
Hogarth, R., Holl, H., and McMahon, A.: Flow testing results from Habanero EGS Project, in: Proceedings of the Australian Geothermal Energy Conferences, 14–15 November 2013, Brisbane, Australia, 2013.
Horálek, J., Jechumtálová, Z., Dorbath, L., and Síleny, J.: Source mechanisms of micro-earthquakes induced in a fluid injection experiment at the HDR site Soultz-sous-For^ets (Alsace) in 2003 and their temporal and spatial variations, Geophys. J. Int., 181, 1547–1565, https://doi.org/10.1111/j.1365-246X.2010.04506.x, 2010.
Houben, G.: Review: Hydraulics of water wells – flow laws and influence of geometry, Hydrogeology J., 23, 1633–1657, 2015.
Hubbert, M. K. and Rubey, W. W.: Role of uid pressure in mechanics of overthrust faulting i. mechanics of uid-lled porous solids and its application to overthrust faulting, Geol. Soc. Am. Bull., 70, 115–166, 1959.
Hummel, N. and Müller, T. M.: Microseismic signatures of non-linear pore-fluid pressure diffusion, Geophys. J. Int., 179, 1558–1565, https://doi.org/10.1111/j.1365-246X.2009.04373.x, 2009.
Husen, S., Bachmann, C., and Giardini, D.: Locally triggered seismicity in the central Swiss Alps following the large rainfall event of August 2005, Geophys. J. Int., 171, 1126–1134, https://doi.org/10.1111/j.1365-246X.2007.03561.x, 2007.
Huw, C., Eisner, L., Styles, P., and Turner, P.: Felt seismicity associated with shale gas hydraulic fracturing: The first documented example in Europe, Geophys. Res. Lett., 41, 8308–8314, https://doi.org/10.1002/2014GL062047, 2014.
Ishida, T.: Acoustic emission monitoring of hydraulic fracturing in laboratory and field, Constr. Build. Mater., 15, 283–295, 2001.
Jaeger, J. C.: Extension Failures in Rocks subject to fluid Pressure, J. Geophys. Res., 68, 6066–6067, 1963.
Jeanne, P., Guglielmi, Y., and Cappa, F.: Dissimilar properties within a carbonate-reservoir's small fault zone, and their impact on the pressurization and leakage associated with CO2 injection, J. Struct. Geol., 47, 25–35, https://doi.org/10.1016/j.jsg.2012.10.010, 2012.
Jeanne, P., Rutqvist, J., Vasco, D., Garcia, J., Dobson, P. F., Walters, M., Hartline, C., and Borgia, A.: A 3D hydrogeological and geomechanical model of an Enhanced Geothermal System at The Geysers, California, Geothermics, 51, 240–252, 2014.
Jeanne, P., Rutqvist, J., Rinaldi, A. P., Dobson, P. F., Walters, M., Hartline, C., and Garcia, J.: Seismic and aseismic deformations and impact on reservoir permeability: The case of EGS stimulation at The Geysers, California, USA, J. Geophys. Res.-Sol. Ea., 120, 7863–7882, 2015.
Jeffrey, R. G. and Bunger, A.: A Detailed Comparison of Experimental and Numerical Data on Hydraulic Fracture Height Growth Through Stress Contrasts, in: Proceedings of the SPE Hydraulic Fracturing Technology Conference, 29–31 January 2007, College Station, USA, Society of Petroleum Engineers, 2007.
Jeffrey, R. G. and Settari, A.: A Comparison of Hydraulic Fracture Field Experiments, Including Mineback Geometry Data, with Numerical Fracture Model Simulations, in: Proceedings of the SPE Annual Technical Conference and Exhibition, 22–25 October 1995, Dallas, USA, Society of Petroleum Engineers, 1995.
Jeffrey, R. G., Brynes, R. P., Lynch, P. J., and Ling, D. J.: An Analysis of Hydraulic Fracture and Mineback Data for a Treatment in the German Creek Coal Seam, in: Proceedings of the SPE Rocky Mountain Regional Meeting, 18–21 May 1992, Casper, USA, Society of Petroleum Engineers, 1992.
Jeffrey, R. G., Enever, J., Phillips, R., Ferguson, T., Davidson, S., and Bride, J.: Small-Scale Hydraulic Fracturing and Mineback Experiment in Coal Seams, in: Proceedings of the 1993 International Coalbed methane Symposium, 17–21 May 1993, Birmingham, UK, 1993.
Jeffrey, R. G., Bunger, A. P., LeCampion, B., Zhang, X., Chen, Z. R., van As, A., Allison, D. P., De Beer, W., Dudley, J. W., Siebrits, E., Thiercelin, M. J., and Mainguy, M.: Measuring Hydraulic Fracture Growth in Naturally Fractured Rock., in: Proceedings of the SPE Annual Technical Conference and Exhibition, 4–7 October 2009, New Orleans, USA, Society of Petroleum Engineers, 2009.
Johnson, E. and Cleary, M. P.: Implications of recent laboratory experimental results for hydraulic fractures, in: Proceedings of the Low Permeability Reservoirs Symposium, 15–17 April 1991, Denver, USA, Society of Petroleum Engineers, 1991.
Jost, M., Büßelberg, T., Jost, Ö., and Harjes, H.: Source parameters of injection-induced microearthquakes at 9 km depth at the KTB Deep Drilling site, Germany, B. Seismol. Soc. Am., 88, 815–832, 1998.
Jung, R.: Hydraulic in situ investigations of an artificial fracture in the Falkenberg Granite, Int. J. Rock Mech. Min., 26, 301–308, 1989.
Jung, R.: EGS – Goodbye or Back to the Future, in: Effective and Sustainable Hydraulic Fracturing, edited by: Bunger, A. P., McLennan, J., and Jeffrey, R., InTech, 95–121, https://doi.org/10.5772/56458, 2013.
Jupe, A., Green, A. S. P., and Wallroth, T.: Induced Microseismicity and Reservoir Growth at the Fjällbacka Hot Dry Rocks Project, Sweden, Int. J. Rock Mech. Min., 29, 343–354, 1992.
Kaieda, H., Jones, R., Moriya, H., Sasaki, S., and Ushijima, K.: Ogachi HDR reservoir evaluation by AE and geophysical methods, in: Proceedings of the World Geothermal Congress 2005, 24–29 April 2005, Antalya, Turkey, 3755–3760, 2005.
Karvounis, D. C., Gischig, V. S., and Wiemer, S.: Towards a Real-Time Forecast of Induced Seismicity for Enhanced Geothermal Systems, in: Proceedings of the 2014 Shale Energy Engineering Conference, 21–23 July 2014, Pittsburgh, USA, 246 pp., 2014.
Keranen, K. M, Savage, H. M., Abers, G. A., and Cochran, E. S.: Potentially induced earthquakes in Oklahoma, USA: Links between wastewater injection and the 2011 Mw 5.7 earthquake sequence, Geology, 41, 699–702, https://doi.org/10.1130/G34045.1, 2013.
Király-Proag, E., Zechar, J. D., Gischig, V., Wiemer, S., Karvounis, D., and Doetsch, J.: Validating induced seismicity forecast models – Induced Seismicity Test Bench, J. Geophys. Res.-Sol. Ea., 121, 6009–6029, https://doi.org/10.1002/2016JB013236, 2016.
Kohl, T., Evans, K. F., Hopkirk, R. J., Jung, R., and Rybach, L.: Observation and simulation of non-Darcian flow transients in fractured rock, Water Resour. Res., 33, 407–418, 1997.
Kraft, T. and Deichmann, N.: High-precision relocation and focal mechanism of the injection induced seismicity at the Basel EGS, Geothermics, 52, 59–73, 2014.
Krietsch, H., Gischig, V., Jalali, R., Amann, F., Evans, K. F., Doetsch, J., and Valley, B.: Stress measurements in crystalline rock: Comparison of overcoring, hydraulic fracturing and induced seismicity results, in: Proceedings of the 51st US Rock Mechanic/Geomechanics Symposium, 25–28 June 2017, San Francisco, USA, American Rock Mech. Association, 2017.
Kwiatek, G., Plenkers, K., and Dresen, G.: Source Parameters of Picoseismicity Recorded at Mponeng Deep Gold Mine, South Africa: Implications for Scaling Relations, B. Seismol. Soc. Am., 101, 2592–2608, https://doi.org/10.1785/0120110094, 2011.
Lee, H. S. and Cho, T. F.: Hydraulic Characteristics of Rough Fractures in Linear Flow under Normal and Shear Load, Rock Mech. Rock Eng., 35, 299–318, https://doi.org/10.1007/s00603-002-0028-y, 2002.
Louis, C., Dessene, J.-L., and Feuga, B.: Interaction between water flow phenomena and the mechanical behavior of soil or rock masses, in: Finite elements in geomechanics, edited by: Gudehns, G., Wiley, New York, USA, 479–511, 1977.
Majer, E., Nelson, J., Robertson-Tait, A., Savy, J., and Wong, I.: Protocol for addressing induced seismicity associated with enhanced geothermal systems, U.S. Department of Energy, Energy Efficiency and Renewable Energy, Washington, D.C., USA, 1–46, 2012.
Manning, C. and Ingebritsen, S.: Permeability of the continental crust: Implications of geothermal data and metamorphic systems, Rev. Geophys., 37, 127–150, 1999.
Marone, C. and Scholz, C. H.: The depth of seismic faulting and the upper transition from stable to unstable slip regimes, Geophys. Res. Lett., 15, 621–624, https://doi.org/10.1029/GL015i006p00621, 1988.
Martin, C. D., Davison, C. C., and Kozak, E. T.: Characterizing normal stiffness and hydraulic conductivity of a major shear zone in granite, in: Rock joints – Proceedings of the International Symposium on rock joints, edited by: Barton, N. and Stephansson, O., Balkema, Rotterdam, the Netherlands, 549–556, 1990.
Martínez-Garzón, P., Bohnhoff, M., Kwiatek, G., and Dresen, G.: Stress tensor changes related to fluid injection at The Geysers geothermal field, California, Geophys. Res. Lett., 40, 2596–2601, 2013.
Martínez-Garzón, P., Kwiatek, G., Bohnhoff, M., and Dresen, G.: Volumetric components in the earthquake source related to fluid injection and stress state, Geophys. Res. Lett., 44, 800–809, 2017.
Maury, V.: Rock failure mechanisms identification: A key for wellbore stability and reservoir behaviour problem, in: Proceedings of the Rock Mechanics in Petroleum Engineering (Eurock 94), 29–31 August 1994, Delft, the Netherlands, 175–182, 1994.
Maxwell, S.: Microseismic Imaging of Hydraulic Fracturing: Improved Engineering of Unconventional Shale Reservoirs, Distinguished Instructor Series, 17, Society of Exploration Geophysicists, Tulsa, USA, 214 pp., 2014.
McClure, M. W.: Modelling and characterization of hydraulic stimulation and induced seismicity in geothermal and shale gas reservoirs, PhD, Stanford University, Stanford, California, USA, 369 pp., 2012.
McClure, M. W.: Generation of large postinjection-induced seismic events by backflow from dead-end faults and fractures, Geophys. Res. Lett., 42, 6647–6654, 2015.
McClure, M. W. and Horne, R. N.: Investigation of injection-induced seismicity using a coupled fluid flow and rate/state friction model, Geophysics, 76, 181–198, 2011.
McClure, M. W. and Horne, R. N.: An investigation of stimulation mechanisms in Enhanced Geothermal Systems, Int. J. Rock Mech. Min., 72, 242–260, 2014.
McGarr, A.: Seismic moments and volume changes, J. Geophys. Res., 81, 1487–1494, 1976.
Mena, B., Wiemer, S., and Bachmann, C.: Building robust model to forecast the induced seismicity related to geothermal reservoir enhancements, Bull. Seismol. Soc. Am., 103, 383–393, 2013.
Meng, C.: Hydraulic fracture propagation in pre-fractured rocks, in: Proceedings of the SPE Hydraulic Fracturing Technology Conference, 24–26 January 2011, The Woodlands, USA, Society of Petroleum Enigneers, 2011.
Mignan, A., Landtwing, D., Kästli, P., Mena, B., and Wiemer, S.: Induced seismicity risk analysis of the 2006 Basel, Switzerland, Enhanced Geothermal System project: Influence of uncertainties on risk mitigation, Geothermics, 53, 133–146, 2015.
Murdoch, L. C., Schweisinger, T., Svenson, E., and Germanovich, L.: Measuring and analyzing transient changes in fracture aperture during well tests: preliminary results, in: Proceedings of the Dynamics of fluids in fractured rock (Witherspoon Conference), 10–12 February 2004, Lawrence Berkeley National Laboratory, California, USA, 129–132, 2004.
Murphy H., Huang, C., Dash, Z., Zyvoloski, G., and White, A.: Semi-analytical solutions for fluid flow in rock joints with pressure-dependent openings, Water Resour. Res., 40, W12506, https://doi.org/10.1029/2004WR003005, 2004.
Nicholson, C. and Wesson, R.L.: Earthquake Hazard Associated with Deep Well Injection – A Report to the U.S. Environmental Protection Agency, U.S. Geological Survey Bulletin, Denver, USA, 74 pp., 1951.
Nicol, D. A. C. and Robinson, B. A.: Modelling the heat extraction from the Rosemanowes HDR reservoir, Geothermics, 19, 247–257, 1990.
Niitsuma, H., Fehler, M., Jones, R., Wilson, S., Albright, J., Green, A., Baria, R., Hayashi, K., Kaieda, H., Tezuka, K., Jupe, A., Wallroth, T., Cornet, F., Asanuma, H., Moriya, H., Nagano, K., Phillips, W.S., Rutledge, J., House, L., Beauce, A., Alde, D., and Aster, R.: Current status of seismic and borehole measurements for HDR/HWR development, Geothermics, 28, 475–490, 1999.
Olsson, R. and Barton, N.: An improved model for hydromechanical coupling during shearing of rock joints, Int. J. Rock Mech. Min., 38, 317–329, 2001.
Parker, R. H.: Hot Dry Rock Geothermal Energy: Phase 2B Final Report of the Camborne School of Mines Project, Pergamon Press, Oxford, UK, 1391 pp., 1989.
Parker, R. H.: The Rosemanowes HDR project 1983–1991, Geothermics, 28, 603–615, 1999.
Pearson, C.: The relationship between microseismicity and high pore pressures during hydraulic stimulation experiments in low porosity granitic rock, J. Geophys. Res., 86, 7855–7864, 1981.
Pettitt, W., Pierce, M., Damjanac, B., Hazzard, J., Lorig, L., Fairhurst, C., Gil, I., Sanchez, M., Nagel, N., Reyes-Montes, J., and Young, R. P.: Fracture network engineering for hydraulic fracturing, The Leading Edge, 30, 844–853, https://doi.org/10.1190/1.3626490, 2011.
Petty, S., Nordin, Y., Glassely, W., and Cladouhos, T.: Improving geothermal project economics with multi-zone stimulation: results from the Newberry volcano EGS demonstration, in: Proceedings of the Thirty-Eighth Workshop on Geothermal Reservoir Engineering, 11–13 February 2013, Stanford, USA, 2013.
Phillips, S., House, L. S., and Fehler, M. C.: Detailed joint structure in a geothermal reservoir from studies of induced microseismic clusters, J. Geophys. Res.-Sol. Ea., 102, 11745–11763, 1997.
Pine, R. J., Baria, R., Pearson, R. A., Kwakwa, K., and McCartney, R.: A Technical Summary of Phase 2B of the Camborne School of Mines HDR Project, 1983–1986, Geothermics, 16, 341–353, 1987.
Power, W. L. and Tullis, T. E.: Euclidean and fractal models for the description of surface roughness, J. Geophys. Res., 96, 415–424, 1991.
Preisig, G., Eberhardt, E., Gischig, V., Roche, V., Van der Baan, M., Valley, B., Kaiser, P., and Du, D.: Development of connected rock mass permeability by hydraulic fractures growth accompanying fluid injection, Geofluids, 15, 321–337, 2015.
Pruess, K.: Enhanced geothermal systems (EGS) using CO2 as working fluid – a novel approach for generating renewable energy with simultaneous sequestration of carbon, Geothermics, 35, 351–367, 2006.
Pruess, K.: Role of fluid pressure in the production behavior of enhanced geothermal systems with CO2 as working fluid, GRC Trans., 31, 307–311, 2007.
Rahman, M. K., Hossain, M. M., and Rahman, S. S.: A shear-dilation-based model for evaluation of hydraulically stimulated naturally fractured reservoirs, Int. J. Numer. Anal. Met., 26, 469–497, 2002.
Raleigh, C., Healy, J., and Bredehoeft, J.: An experiment in earthquake control at rangely, Colorado, Science, 191, 1230–1237, 1976.
Randolph, J. B. and Saar, M. O.: Combining geothermal energy capture with geologic carbon dioxide sequestration, Geophys. Res. Lett., 38, L10401, https://doi.org/10.1029/2011GL047265, 2011a.
Randolph, J. B. and Saar, M. O.: Coupling carbon dioxide sequestration with geothermal energy capture in naturally permeable, porous geologic formations: Implications for CO2 sequestration, Energy Proced., 4, 2206–2213, https://doi.org/10.1016/j.egypro.2011.02.108, 2011b.
Robinson, B. A. and Brown, D. W.: Modeling the hydraulic characteristics of the Femton Hill, New Mexico Hot Dry Rock Reservoir, International Symposium on Geothermal Energy, 20–24 August, Kaillua, Kona, Hawaii, USA, 1990.
Rutledge, J. T., Phillips, W. S., and Mayerhofer, M. J.: Faulting Induced by Forced Fluid Injection and Fluid Flow Forced by Faulting: An Interpretation of Hydraulic-Fracture Microseismicity, Carthage Cotton Valley Gas Field, Texas, B. Seismol. Soc. Am., 94, 1817–1830, 2004.
Rutqvist, J.: Determination of hydraulic normal stiffness of fractures in hard rock from well testing, Int. J. Rock Mech. Min., 32, 513–523, 1995.
Rutqvist, J.: Status of the tough-ac simulator and recent applications related to coupled fluid flow and crustal deformations, Comput. Geosci., 37, 739–750, 2011.
Rutqvist, J. and Oldenburg, C. M.: Analysis of injection-induced micro-earthquakes in a geothermal stream reservoir, Geysers Geothermal Field, California, in: Proceedings of the 42th US Rock Mech. Symposium, 29 June–2 July 2008, San Francisco, USA, 151 pp., 2008.
Rutqvist, J. and Stephansson, O.: A cyclic hydraulic jacking test to determine the in-situ stress normal to a fracture, Int. J. Rock Mech. Min., 33, 695–711, 1996.
Rutqvist, J. and Stephansson, O.: The role of hydromechanical coupling in fractured rock engineering, Hydrogeol. J., 11, 7–40, 2003.
Saar, M. O.: Review: Geothermal heat as a tracer of large-scale groundwater flow and as a means to determine permeability fields, Hydrogeol. J., 19, 31–52, https://doi.org/10.1007/s10040-010-0657-2, 2011.
Saar, M. O.: Novel Geothermal Technologies, in: Potentials, costs and environmental assessment of electricity generation technologies, edited by: Bauer, C. and Hirschberg, S., Swiss Federal Office of Energy, Swiss Competences Center for Energy Research “Supply of Electricity” and “Biomass for Swiss Energy Future”, Bern, Switzerland, 715–725, 2017.
Saar, M. O. and Manga, M.: Seismicity induced by seasonal groundwater recharge at Mt. Hood, Oregon, Earth Planet. Sc. Lett., 214, 605–618, https://doi.org/10.1016/S0012-821X(03)00418-7, 2003.
Saar, M. O. and Manga, M.: Depth dependence of permeability in the Oregon Cascades inferred from hydrogeologic, thermal, seismic, and magmatic modeling constraints, J. Geophys. Res., 109, B04204, https://doi.org/10.1029/2003JB002855, 2004.
Samuelson, J., Elsworth, D., and Marone, C.: Shear-induced dilatancy of fluid-saturated faults: Experiment and theory, J. Geophys. Res.-Sol. Ea., 114, 1–15, 2009.
Schmittbuhl, J., Schmitt, F., and Scholz, C.H.: Scaling invariance of crack surfaces, J. Geophys. Res., 100, 5953–5973, 1995.
Schoenball, M., Baujard, C., Kohl, T., and Dorbath, L.: The role of triggering by static stress transfer during geothermal reservoir stimulation, J. Geophys. Res., 117, B09307, https://doi.org/10.1029/2012JB009304, 2012.
Scholz, C. H.: On the stress dependence of the earthquake b value, Geophys. Res. Lett., 42, 1399–1402, https://doi.org/10.1002/2014GL062863, 2015.
Schorlemmer, D., Wiemer, S., and Wyss, M.: Variations in earthquake size distribution across different stress regimes, Nature, 437, 539–542, 2005.
Schrauf, T. W. and Evans, D. D.: Laboratory Studies of Gas Flow Through a Single Natural Fracture, Water Resour. Res., 22, 1038–1050, 1986.
Schweisinger, T., Murdoch, L. C., and Huey Jr., C. O.: Design of a removable borehole extensometer, Geotech. Test. J., 30, 202–211, 2007.
Schweisinger T., Swenson, E. J., and Murdoch, L. C.: Introduction to hydromechanical well tests in fractured rock aquifers, Groundwater, 47, 69–79, 2009.
Scotti, O. and Cornet, F. H.: In situ evidence for fluid induced aseismic slip events along fault zones, Int. J. Rock Mech. Min., 1, 347–358, 1994.
Shamir, G. and Zoback, M. D.: Stress orientation profile to 3.5 km depth near the San Andreas fault at Cajon Pass, California, J. Geophys. Res., 97, 5059–5080, 1992.
Sileny, J., Hill, D. P., and Cornet, F. H.: Non-double-couple mechanisms of microearthquakes induced by hydraulic fracturing, J. Geophys. Res., 114, B08307, https://doi.org/10.1029/2008JB005987, 2009.
Song, I., Suh, M., Won, K., and Haimson, B.: A laboratory study of hydraulic fracturing breakdown pressure in tablerock sandstone, Geosci. J., 5, 263–271, https://doi.org/10.1007/bf02910309, 2001.
Spada, M., Tormann, T., Goebel, T., and Wiemer, S.: Generic dependence of the frequency-size distribution of earthquakes on depth and its relation to the strength profile of the crust, Geophys. Res. Lett., 40, 709–714, 2013.
Stein, R. S.: The role of stress transfer in earthquake occurrence, Nature, 402, 605–609, 1999.
Tenma, N., Yamaguchi, T., and Zyvoloski, G.: The Hijiori Hot Dry Rock test site, Japan evaluation and optimization of heat extraction from a two-layered reservoir, Geothermics, 37, 19–52, 2008.
Terakawa, T., Miller, S. A., and Deichmann, N.: High fluid pressure and triggered earthquakes in the enhanced geothermal system in Basel, Switzerland, J. Geophys. Res., 117, B07305, https://doi.org/10.1029/2011JB008980, 2012.
Tester, J. W., Anderson, B. J., Batchelor, A., Blackwell, D., DiPippo, R., Drake, E., Garnish, J., Livesay, B., Moore, M., Nichols, K., Petty, S., Toksöz, M. N., and Veatch, R. W.: The future of geothermal energy – Impact of Enhanced Geothermal Systems (EGS) on the United States in the 21st Century, Massachusetts Institute of Technology, Cambridge, USA, 372 pp., 2006.
Tezuka, K. and Niitsuma, H.: Stress estimated using microseismic clusters and its relationship to the fracture system of the Hijiori Hot Dry Rock reservoir, Eng. Geol., 56, 47–62, 2000.
Tormann, T., Wiemer, S., and Mignan, A.: Systematic survey of high-resolution b value imaging along Californian faults: Inference on asperities, J. Geophys. Res.-Sol. Ea., 119, 2029–2054, 2014.
Tormann, T., Enescu, B., Woessner, J., and Wiemer, S.: Randomness of megathrust earthquakes implied by rapid stress recovery after the Japan earthquake, Nat. Geosci., 8, 152–158, 2015.
Valley, B. and Evans, K. F.: Stress orientation to 5 km depth in the basement below Basel (Switzerland) from borehole failure analysis, Swiss J. Earth Sci., 102, 467–480, https://doi.org/10.1007/s00015-009-1335-z, 2009.
Valley, B. and Evans, K. F.: Stress Heterogeneity in the Granite of the Soultz EGS Reservoir Inferred from Analysis of Wellbore Failure, in: Proceedings of the World Geothermal Congress, 25–29 April 2010, Bali, Indonesia, International Geothermal Association, 2010.
van As, A. and Jeffrey, R. G.: Caving Induced by Hydraulic Fracturing at Northparkes Mines, in: Proceedings of the 4th North American Rock Mech. Symposium, 31 July–3 August 2000, Seattle, USA, American Rock Mech. Association, 2000.
van As, A. and Jeffrey, R. G.: Hydraulic fracture growth in naturally fractured rock: mine through mapping and analyses, in: Proceedings of the 5th North American Rock Mech. Symposium and the 17th Tunneling Association of Canada Conference (NARMS-TAC conference), 7–10 July 2002, Toronto, Canada, 2002.
van As, A., Jeffrey R. G., Chacónn, E., and Barrera, V.: Preconditioning by hydraulic fracturing for bloc caving in a moderately stressed naturally fractured orebody, in: Proceedings of the Massmin 2004 conference, 22–25 August 2004, Santiago, Chile, 2004.
van der Baan, M., Eaton, D., and Dusseault, M.: Microseismic Monitoring Developments in Hydraulic Fracture Stimulation, in: Effective and Sustainable Hydraulic Fracturing, edited by: Bunger, A. P., McLennan, J., and Jeffrey, R. G., InTech, 439–466, https://doi.org/10.5772/45724, 2013.
Vermylen, J. and Zoback, M. D.: Hydraulic Fracturing, Microseismic Magnitudes, and Stress Evolution in the Barnett Shale, Texas, USA, in: Proceedings of the SPE Hydraulic Fracturing Technology Conference, 24–26 January 2011, The Woodlands, USA, Society of Petroleum Engineers, 2011.
Vogler, D., Amann, F., Bayer, P., and Elsworth, D.: Permeability Evolution in Natural Fractures Subject to Cyclic Loading and Gouge Formation, Rock Mech. Rock Eng., 49, 3463–3479, https://doi.org/10.1007/s00603-016-1022-0, 2016.
Warpinski, N. R.: Measurement of Width and Pressure in a Propagating Hydraulic Fracture, Soc. Petrol. Eng. J., 25, 46–54, https://doi.org/10.2118/11648-PA, 1985.
Warpinski, N. R.: Microseismic Monitoring – Inside and Out, J. Petrol. Technol., 61, 80–85, https://doi.org/10.2118/118537-JPT, 2009.
Warpinski, N. R.: Understanding Hydraulic Fracture Growth, Effectiveness, and Safety Through Microseismic Monitoring, in: Effective and Sustainable Hydraulic Fracturing, edited by: Bunger, A. P., McLennan, J., and Jeffrey, R. G., InTech, 123–135, 2013.
Warpinski, N. R. and Du, J.: Source-Mechanism Studies on Microseismicity Induced by Hydraulic Fracturing, in: Proceedings of the SPE Annual Technical Conference and Exhibition, 19–22 September 2010, Florence, Italy, Society of Petroleum Engineers, 2010.
Warpinski, N. R. and Teufel, L. W.: Influence of geologic discontinuities on hydraulic fracture propagation, J. Petrol. Technol., 39, 209–220, 1987.
Warpinski, N. R., Clark, J. A., Schmidt, R. A., and Huddle, C. W.: Laboratory Investigation on the -Effect of In-Situ Stresses on Hydraulic Fracture Containment, Soc. Petrol. Eng. J., 22, 333–340, https://doi.org/10.2118/9834-PA, 1982.
Warren, W. E. and Smith, C. W.: In Situ Stress Estimates From Hydraulic Fracturing and Direct Observation of Crack Orientation, J. Geophys. Res., 9, 829–868, 1985.
Wolhart, S. L., Harting, T. A., Dahlem, J. E., Young, T., Mayerhofer, M. J., and Lolon, E. P.: Hydraulic fracture diagnostics used to optimize development in the Jonah field, in: Proceedings of the SPE Annual Technical Conference and Exhibition, 24–27 September 2006, San Antonio, USA, Society of Petroleum Engineers, 2006.
Yeo, I. W., De Freitas, M. H., and Zimmerman, R. W.: Effect of shear displacement on the aperture and permeability of a rock fracture, Int. J. Rock Mech. Min., 35, 1051–1070, 1998.
Yoon, J.-S., Zang, A., and Stephansson, O.: Numerical investigation on optimized stimulation of intact and naturally fractured deep geothermal reservoirs using hydro-mechanical coupled discrete particles joints model, Geothermics, 52, 165–184, 2014.
Zang, A., Yoon, J. S., Stephansson, O., and Heidbach, O.: Fatigue hydraulic fracturing by cyclic reservoir treatment enhances permeability and reduces induced seismicity, Geophys. J. Int., 195, 1282–1287, https://doi.org/10.1093/gji/ggt301, 2013.
Ziegler, M., Valley, B., and Evans, K.: Characterisation of Natural Fractures and Fracture Zones of the Basel EGS Reservoir Inferred from Geophysical Logging of the Basel-1 Well, in: Proceedings of the World Geothermal Congress, 19–25 April 2015, Melbourne, Australia, International Geothermal Association, 2015.
Zoback, M. D. and Harjes, H.-P.: Injection-induced earthquakes and crustal stress at 9 km depth at the KTB deep drilling site, Germany, J. Geophys. Res.-Sol. Ea., 102, 18477–18491, 1997.
Zoback, M. D., Rummel, F., Jung, R., and Raleigh, C. B.: Laboratory Hydraulic Fracturing Experiments in Intact and Pre-fractured Rock, Int. J. Rock Mech. Min., 14, 49–58, 1977.
Zoback, M. D., Kohli, A., Das, I., and McClure, M. W.: The importance of slow slip on faults during hydraulic fracturing stimulation of shale gas reservoirs, in: Proceedings of the SPE Americas Unconventional Resources Conference, 5–7 June 2012, Pittsburgh, USA, Society of Petroleum Engineers, 2012.
