Articles | Volume 5, issue 1
https://doi.org/10.5194/se-5-199-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/se-5-199-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Short communication
| 
09 Apr 2014
Short communication |
| 09 Apr 2014
Seismogenic frictional melting in the magmatic column
J. E. Kendrick
School of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool, L69 3GP, UK
Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Theresienstr. 41, 80333 Munich, Germany
Y. Lavallée
School of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool, L69 3GP, UK
K.-U. Hess
Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Theresienstr. 41, 80333 Munich, Germany
S. De Angelis
School of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool, L69 3GP, UK
A. Ferk
Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Theresienstr. 41, 80333 Munich, Germany
Central Institute for Meteorology and Geodynamics, 1190 Vienna, Austria
H. E. Gaunt
Rock & Ice Physics Laboratory, Department of Earth Sciences, University College London, Gower Street, London, UK
P. G. Meredith
Rock & Ice Physics Laboratory, Department of Earth Sciences, University College London, Gower Street, London, UK
D. B. Dingwell
Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Theresienstr. 41, 80333 Munich, Germany
R. Leonhardt
Central Institute for Meteorology and Geodynamics, 1190 Vienna, Austria
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By testing the strength of granite in compression and tension at a range of deformation rates, we found that the strength increases with faster deformation. This observation highlights that at these rates, relevant for example to geothermal exploration, we have to consider how the rate of deformation impacts the energy released when rocks crack. The results are promising for developing safe procedures for extracting resources from the subsurface.
Yan Lavallée, Takahiro Miwa, James D. Ashworth, Paul A. Wallace, Jackie E. Kendrick, Rebecca Coats, Anthony Lamur, Adrian Hornby, Kai-Uwe Hess, Takeshi Matsushima, Setsuya Nakada, Hiroshi Shimizu, Bernhard Ruthensteiner, and Hugh Tuffen
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Jackie E. Kendrick, Lauren N. Schaefer, Jenny Schauroth, Andrew F. Bell, Oliver D. Lamb, Anthony Lamur, Takahiro Miwa, Rebecca Coats, Yan Lavallée, and Ben M. Kennedy
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The last lava dome eruption of Mount Unzen (Japan) ended in 1995, but ongoing instability means much of the area remains an exclusion zone. The rocks in the lava dome impact its stability; heterogeneity (contrasting properties) and anisotropy (orientation-specific properties) can channel fluids and localise deformation, enhancing the risk of lava dome collapse. We recommend using measured material properties to interpret geophysical signals and to model volcanic systems.
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Lava domes are mounds of viscous lava and their collapse can cause deadly pyroclastic flows. This paper looks at the example of Mt. Unzen in Japan. Using novel experimental techniques, we discovered that crystals and bubbles in the lava make it behave differently to what was previously thought and that it becomes weaker and more susceptible to collapse as it cools. This calls for a review of current models, allowing for better failure prediction of lava domes in the future.
O. D. Lamb, S. De Angelis, K. Umakoshi, A. J. Hornby, J. E. Kendrick, and Y. Lavallée
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In this paper we analyse the seismic record during the extrusion of a lava spine at Unzen volcano, Japan, in 1994. We find two strong groups of similar volcanic earthquakes which, combined with previously published field and experimental observations, we interpret as repetitive fracturing along the margin of the lava spine. This work demonstrates the potential of combining these different approaches for achieving a greater understanding of shallow volcanic processes.
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During an eruption, basal granular flows can have a fluidized behavior, inducing over- or underpressure at the bed interface. Basal shear can overturn strata. Large blocks ejected ballistically deform the ground when landing. Explosions at the vent produce shock waves that can destabilize a bed. These syn-eruptive triggers are specific to explosive volcanism.
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Yan Lavallée, Takahiro Miwa, James D. Ashworth, Paul A. Wallace, Jackie E. Kendrick, Rebecca Coats, Anthony Lamur, Adrian Hornby, Kai-Uwe Hess, Takeshi Matsushima, Setsuya Nakada, Hiroshi Shimizu, Bernhard Ruthensteiner, and Hugh Tuffen
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Solid Earth, 10, 725–740, https://doi.org/10.5194/se-10-725-2019, https://doi.org/10.5194/se-10-725-2019, 2019
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Evidence for tidal impacts on volcanism have been gathered by numerous empirical studies. This paper elucidates whether a causal link from the tidal forces to a variation in the volcanic degassing can be traced analytically. We model the response of a simplified magmatic system to the local tidal gravity variations, find that the tide-induced dynamics may significantly alter the bubble coalescence rate, and discuss the consequences for volcanic degassing behaviour.
Rebecca Coats, Jackie E. Kendrick, Paul A. Wallace, Takahiro Miwa, Adrian J. Hornby, James D. Ashworth, Takeshi Matsushima, and Yan Lavallée
Solid Earth, 9, 1299–1328, https://doi.org/10.5194/se-9-1299-2018, https://doi.org/10.5194/se-9-1299-2018, 2018
Short summary
Short summary
Lava domes are mounds of viscous lava and their collapse can cause deadly pyroclastic flows. This paper looks at the example of Mt. Unzen in Japan. Using novel experimental techniques, we discovered that crystals and bubbles in the lava make it behave differently to what was previously thought and that it becomes weaker and more susceptible to collapse as it cools. This calls for a review of current models, allowing for better failure prediction of lava domes in the future.
Janine L. Kavanagh, Samantha L. Engwell, and Simon A. Martin
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Lucia Gurioli, Andrea Di Muro, Ivan Vlastélic, Séverine Moune, Simon Thivet, Marina Valer, Nicolas Villeneuve, Guillaume Boudoire, Aline Peltier, Patrick Bachèlery, Valérie Ferrazzini, Nicole Métrich, Mhammed Benbakkar, Nicolas Cluzel, Christophe Constantin, Jean-Luc Devidal, Claire Fonquernie, and Jean-Marc Hénot
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We prove here that macroscopic and microscopic studies of emitted pyroclastic and effusive products provide valuable information to track and understand small explosive eruptions for hazard and risk assessment. This is especially true for Piton de La Fournaise, La Réunion, whose activity has recently been characterized by effusive and mild explosive activity in highly visited areas. We confirm that petrological monitoring is essential to forecast changes in the magmatic system.
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Jorge Eduardo Romero, Guilhem Amin Douillet, Silvia Vallejo Vargas, Jorge Bustillos, Liliana Troncoso, Juan Díaz Alvarado, and Patricio Ramón
Solid Earth, 8, 697–719, https://doi.org/10.5194/se-8-697-2017, https://doi.org/10.5194/se-8-697-2017, 2017
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The 1 February 2014 eruption of the Tungurahua volcano (Ecuador) was the second largest one since the re-awakening in 1999. The eruption showed precursory signs only 48 h before the eruption. The main explosions produced a 13 km eruptive column and pyroclastic density currents that reached the base of the volcano.
Here we document the deposits related to the eruption and infer eruption mechanisms and transport processes.
Jamie I. Farquharson, Patrick Baud, and Michael J. Heap
Solid Earth, 8, 561–581, https://doi.org/10.5194/se-8-561-2017, https://doi.org/10.5194/se-8-561-2017, 2017
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In volcanic rock, permeability is the property that tells us how efficiently fluids such as gas or water can travel through cracks and frozen bubbles in the rock (its porosity) and is important in the context of volcanic activity. This study addresses how permeability evolves under a range of mechanical experimental conditions. We show that with a small amount of porosity loss (compaction), permeability can increase. However, with more compaction, permeability can decrease significantly.
Donald B. Dingwell, Yan Lavallée, Kai-Uwe Hess, Asher Flaws, Joan Marti, Alexander R. L. Nichols, H. Albert Gilg, and Burkhard Schillinger
Solid Earth, 7, 1383–1393, https://doi.org/10.5194/se-7-1383-2016, https://doi.org/10.5194/se-7-1383-2016, 2016
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Here, we use tomography to reconstructed the pores of erupted pumice and understand the evolution of gas bubbles in magma. Analysis of the pore geometry is used to describe whether the pores where aligned by stretching as ascending magma is pulled apart (pure shear) or sheared like a deck of card (simple shear). We conclude that the latter, simple shear, dominates during magma ascent up to the points where magma fragments to cause an explosion.
A. Coco, J. Gottsmann, F. Whitaker, A. Rust, G. Currenti, A. Jasim, and S. Bunney
Solid Earth, 7, 557–577, https://doi.org/10.5194/se-7-557-2016, https://doi.org/10.5194/se-7-557-2016, 2016
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We present a numerical model to evaluate ground deformation and gravity changes as a response of the hydrothermal system perturbation (unrest) in a volcanic area. Temporal evolution of the ground deformation indicates that the contribution of thermal effects to the total uplift is almost negligible with respect to the pore pressure contribution during the first years, of the unrest, but increases in time and becomes dominant after a long period of the simulation.
O. D. Lamb, S. De Angelis, K. Umakoshi, A. J. Hornby, J. E. Kendrick, and Y. Lavallée
Solid Earth, 6, 1277–1293, https://doi.org/10.5194/se-6-1277-2015, https://doi.org/10.5194/se-6-1277-2015, 2015
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In this paper we analyse the seismic record during the extrusion of a lava spine at Unzen volcano, Japan, in 1994. We find two strong groups of similar volcanic earthquakes which, combined with previously published field and experimental observations, we interpret as repetitive fracturing along the margin of the lava spine. This work demonstrates the potential of combining these different approaches for achieving a greater understanding of shallow volcanic processes.
K. Strehlow, J. H. Gottsmann, and A. C. Rust
Solid Earth, 6, 1207–1229, https://doi.org/10.5194/se-6-1207-2015, https://doi.org/10.5194/se-6-1207-2015, 2015
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When magma chambers inflate, they deform the surrounding Earth’s crust. This deformation affects the pore space available for the water in local aquifers, which in turn leads to pressure variations and water table changes. We can observe these changes in wells, and this study investigates if and how we can utilize them for volcano monitoring. Results show that the hydrological response to deformation helps unravelling subsurface magmatic processes, valuable information for eruption forecasting.
B. Bernard, U. Kueppers, and H. Ortiz
Solid Earth, 6, 869–879, https://doi.org/10.5194/se-6-869-2015, https://doi.org/10.5194/se-6-869-2015, 2015
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This paper presents a new methodology to treat statistically pyroclast density and porosity data sets introducing a weighting parameter. It also proposes a stability analysis to check if the sample set is large enough for statistical reliability. Finally we introduce graphical statistics to improve distinction between pyroclastic deposits and understanding of eruptive dynamics. An open source R code is supplied that includes all these features in order to facilitate data processing.
F. Braz Machado, E. Reis Viana Rocha-Júnior, L. Soares Marques, and A. J. Ranalli Nardy
Solid Earth, 6, 227–241, https://doi.org/10.5194/se-6-227-2015, https://doi.org/10.5194/se-6-227-2015, 2015
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This study describes for the first time morphological aspects of lava flows and structural characteristics caused by lava-sediment interaction in the northwestern Paraná continental flood basalts in the southeast of the South American Plate (Brazil). Early Cretaceous (134 to 132Ma) tholeiitic rocks were emplaced on a large intracratonic Paleozoic sedimentary basin (Paraná Basin), mainly covering dry eolian sandstones (Botucatu Formation).
Y. Moussallam, N. Peters, C. Ramírez, C. Oppenheimer, A. Aiuppa, and G. Giudice
Solid Earth, 5, 1341–1350, https://doi.org/10.5194/se-5-1341-2014, https://doi.org/10.5194/se-5-1341-2014, 2014
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In this paper we characterise the flux and composition of the gas emissions from Turrialba Volcano. We show that the measured gas signature provides evidence that Turrialba Volcano has entered an open-vent configuration with magmatic gases being emitted. This suggests that the hydrothermal system at the summit is quickly drying up and that the system is moving from a hydrothermal to a magmatic end member with implications for short-term monitoring and possible evolution of the state of unrest.
P. Lübcke, N. Bobrowski, S. Arellano, B. Galle, G. Garzón, L. Vogel, and U. Platt
Solid Earth, 5, 409–424, https://doi.org/10.5194/se-5-409-2014, https://doi.org/10.5194/se-5-409-2014, 2014
T. J. Jones, J. K. Russell, L. A. Porritt, and R. J. Brown
Solid Earth, 5, 313–326, https://doi.org/10.5194/se-5-313-2014, https://doi.org/10.5194/se-5-313-2014, 2014
M. Pantaleo and T. R. Walter
Solid Earth, 5, 183–198, https://doi.org/10.5194/se-5-183-2014, https://doi.org/10.5194/se-5-183-2014, 2014
A. C. F. Luchetti, A. J. R. Nardy, F. B. Machado, J. E. O. Madeira, and J. M. Arnosio
Solid Earth, 5, 121–130, https://doi.org/10.5194/se-5-121-2014, https://doi.org/10.5194/se-5-121-2014, 2014
M. J. Heap, P. Baud, P. G. Meredith, S. Vinciguerra, and T. Reuschlé
Solid Earth, 5, 25–44, https://doi.org/10.5194/se-5-25-2014, https://doi.org/10.5194/se-5-25-2014, 2014
A. LaRue, D. R. Baker, M. Polacci, P. Allard, and N. Sodini
Solid Earth, 4, 373–380, https://doi.org/10.5194/se-4-373-2013, https://doi.org/10.5194/se-4-373-2013, 2013
S. B. Mueller, N. R. Varley, U. Kueppers, P. Lesage, G. Á. Reyes Davila, and D. B. Dingwell
Solid Earth, 4, 201–213, https://doi.org/10.5194/se-4-201-2013, https://doi.org/10.5194/se-4-201-2013, 2013
N. Bobrowski and G. Giuffrida
Solid Earth, 3, 433–445, https://doi.org/10.5194/se-3-433-2012, https://doi.org/10.5194/se-3-433-2012, 2012
S. Lepore and C. Scarpati
Solid Earth, 3, 161–173, https://doi.org/10.5194/se-3-161-2012, https://doi.org/10.5194/se-3-161-2012, 2012
O. Sigmarsson, I. Vlastelic, R. Andreasen, I. Bindeman, J.-L. Devidal, S. Moune, J. K. Keiding, G. Larsen, A. Höskuldsson, and Th. Thordarson
Solid Earth, 2, 271–281, https://doi.org/10.5194/se-2-271-2011, https://doi.org/10.5194/se-2-271-2011, 2011
A. Aiuppa, M. Burton, P. Allard, T. Caltabiano, G. Giudice, S. Gurrieri, M. Liuzzo, and G. Salerno
Solid Earth, 2, 135–142, https://doi.org/10.5194/se-2-135-2011, https://doi.org/10.5194/se-2-135-2011, 2011
D. Giordano, M. Polacci, P. Papale, and L. Caricchi
Solid Earth, 1, 61–69, https://doi.org/10.5194/se-1-61-2010, https://doi.org/10.5194/se-1-61-2010, 2010
E. Peruzzo, M. Barsanti, F. Flandoli, and P. Papale
Solid Earth, 1, 49–59, https://doi.org/10.5194/se-1-49-2010, https://doi.org/10.5194/se-1-49-2010, 2010
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