Articles | Volume 11, issue 5
https://doi.org/10.5194/se-11-1947-2020
© Author(s) 2020. 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-11-1947-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
29 Oct 2020
Research article |
| 29 Oct 2020
| 29 Oct 2020
Crustal structures beneath the Eastern and Southern Alps from ambient noise tomography
International Data Center, CTBTO, Vienna, Austria
Department of Meteorology and Geophysics, University of Vienna, Vienna, Austria
Dimitri Zigone
Institut de Physique du Globe de Strasbourg, EOST, Université de Strasbourg/CNRS, Strasbourg, France
Mark R. Handy
Institute of Geological Sciences, Freie Universität Berlin, Berlin, Germany
Götz Bokelmann
Department of Meteorology and Geophysics, University of Vienna, Vienna, Austria
For further information regarding the team, please visit the link which appears at the end of the paper.
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Subject area: Crustal structure and composition | Editorial team: Seismics, seismology, paleoseismology, geoelectrics, and electromagnetics | Discipline: Seismology
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Rocks in mountain belts have been deformed during continental collision causing a certain alignment of the minerals referred to as crystallographic preferred orientation (CPO). Minerals have anisotropic properties: the velocity of seismic waves travelling through them is direction dependent. This leads to anisotropy of the rocks. We measured the CPO of common rocks within the Alps. With this data and known anisotropic properties of the minerals we calculated the seismic anisotropy of the rocks.
Laura Peruzza, Alessandra Schibuola, Maria Adelaide Romano, Marco Garbin, Mariangela Guidarelli, Denis Sandron, and Enrico Priolo
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Fabian Limberger, Michael Lindenfeld, Hagen Deckert, and Georg Rümpker
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Frequency-dependent amplitude decays of seismic signals induced by wind turbines are determined from (up to) 6 months of continuous recordings measured along an 8 km profile located at a wind farm in Bavaria, Germany. The radiation pattern and amplitude decay of the induced signals are accounted for by an analytical approach that includes path and source effects. This approach is generalized to predict the characteristic seismic radiation patterns of arbitrary wind farm configurations.
Azam Jozi Najafabadi, Christian Haberland, Trond Ryberg, Vincent F. Verwater, Eline Le Breton, Mark R. Handy, Michael Weber, and the AlpArray and AlpArray SWATH-D working groups
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Javier Ojeda and Sergio Ruiz
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In Santiago, Chile, the lockdown imposed due to COVID-19 was recorded by seismological instruments. This analysis shows temporal changes in the surface vibrations controlled by lockdown phases, mobility, and epidemiological factors. Our findings suggest that
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Jiří Kvapil, Jaroslava Plomerová, Hana Kampfová Exnerová, Vladislav Babuška, György Hetényi, and AlpArray Working Group
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Mohammed Bello, David G. Cornwell, Nicholas Rawlinson, Anya M. Reading, and Othaniel K. Likkason
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In this study, ground motion caused by distant earthquakes recorded in southeast Australia is used to image the structure of the crust and underlying mantle. This part of the Australian continent was assembled over the last 500 million years, but it remains poorly understood. By studying variations in crustal properties and thickness, we find evidence for the presence of an old microcontinent that is embedded in the younger terrane and forms a connection between Victoria and Tasmania.
Kasper van Wijk, Calum J. Chamberlain, Thomas Lecocq, and Koen Van Noten
Solid Earth, 12, 363–373, https://doi.org/10.5194/se-12-363-2021, https://doi.org/10.5194/se-12-363-2021, 2021
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The Auckland Volcanic Field is monitored by a seismic network. The lockdown measures to combat COVID-19 in New Zealand provided an opportunity to evaluate the performance of seismic stations in the network and to search for small(er) local earthquakes, potentially hidden in the noise during "normal" times. Cross-correlation of template events resulted in detection of 30 new events not detected by GeoNet, but there is no evidence of an increase in detections during the quiet period of lockdown.
Janneke van Ginkel, Elmer Ruigrok, and Rien Herber
Solid Earth, 11, 2015–2030, https://doi.org/10.5194/se-11-2015-2020, https://doi.org/10.5194/se-11-2015-2020, 2020
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Knowledge of subsurface velocities is key to understand how earthquake waves travel through the Earth. We present a method to construct velocity profiles for the upper sediment layer on top of the Groningen field, the Netherlands. Here, the soft-sediment layer causes resonance of seismic waves, and this resonance is used to compute velocities from. Recordings from large earthquakes and the background noise signals are used to derive reliable velocities for the deep sedimentary layer.
Laura Ermert, Jonas Igel, Korbinian Sager, Eléonore Stutzmann, Tarje Nissen-Meyer, and Andreas Fichtner
Solid Earth, 11, 1597–1615, https://doi.org/10.5194/se-11-1597-2020, https://doi.org/10.5194/se-11-1597-2020, 2020
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We present an open-source tool to model ambient seismic auto- and cross-correlations with spatially varying source spectra. The modeling is based on pre-computed databases of seismic wave propagation, which can be obtained from public data providers. The aim of this tool is to facilitate the modeling of ambient noise correlations, which are an important seismologic observable, with realistic wave propagation physics. We present a description and benchmark along with example use cases.
Ben Moseley, Tarje Nissen-Meyer, and Andrew Markham
Solid Earth, 11, 1527–1549, https://doi.org/10.5194/se-11-1527-2020, https://doi.org/10.5194/se-11-1527-2020, 2020
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Simulations of seismic waves are very important; they allow us to understand how earthquakes spread and how the interior of the Earth is structured. However, whilst powerful, existing simulation methods usually require a large amount of computational power and time to run. In this research, we use modern machine learning techniques to accelerate these calculations inside complex models of the Earth.
Antonio Villaseñor, Robert B. Herrmann, Beatriz Gaite, and Arantza Ugalde
Solid Earth, 11, 63–74, https://doi.org/10.5194/se-11-63-2020, https://doi.org/10.5194/se-11-63-2020, 2020
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We present new earthquake focal depths and fault orientations for earthquakes that occurred in 2013 in the vicinity of an underground gas storage off the east coast of Spain. Our focal depths are in the range of 5–10 km, notably deeper than the depth of the gas injection (2 km). The obtained fault orientations also differ from the predominant faults at shallow depths. This suggests that the faults reactivated are deeper, previously unmapped faults occurring beneath the sedimentary layers.
Juvenal Andrés, Deyan Draganov, Martin Schimmel, Puy Ayarza, Imma Palomeras, Mario Ruiz, and Ramon Carbonell
Solid Earth, 10, 1937–1950, https://doi.org/10.5194/se-10-1937-2019, https://doi.org/10.5194/se-10-1937-2019, 2019
Marisol Monterrubio-Velasco, F. Ramón Zúñiga, José Carlos Carrasco-Jiménez, Víctor Márquez-Ramírez, and Josep de la Puente
Solid Earth, 10, 1519–1540, https://doi.org/10.5194/se-10-1519-2019, https://doi.org/10.5194/se-10-1519-2019, 2019
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Earthquake aftershocks display spatiotemporal correlations arising from their self-organized critical behavior. Stochastical models such as the fiber bundle (FBM) permit the use of an analog of the physical model that produces a statistical behavior with many similarities to real series. In this work, a new model based on FBM that includes geometrical faults systems is proposed. Our analysis focuses on aftershock statistics, and as a study case we modeled the Northridge sequence.
Chisheng Wang, Junzhuo Ke, Jincheng Jiang, Min Lu, Wenqun Xiu, Peng Liu, and Qingquan Li
Solid Earth, 10, 1397–1407, https://doi.org/10.5194/se-10-1397-2019, https://doi.org/10.5194/se-10-1397-2019, 2019
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The point cloud of located aftershocks contains the information which can directly reveal the fault geometry and temporal evolution of an earthquake sequence. However, there is a lack of studies using state-of-the-art visual analytics methods to explore the data to discover hidden information about the earthquake fault. We present a novel interactive approach to illustrate 3-D aftershock point clouds, which can help the seismologist to better understand the complex fault system.
Michael Behm, Feng Cheng, Anna Patterson, and Gerilyn S. Soreghan
Solid Earth, 10, 1337–1354, https://doi.org/10.5194/se-10-1337-2019, https://doi.org/10.5194/se-10-1337-2019, 2019
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New acquisition styles for active seismic source exploration provide a wealth of additional quasi-passive data. We show how these data can be used to gain complementary information about the subsurface. Specifically, we process an active-source dataset from an alpine valley in western Colorado with both active and passive inversion schemes. The results provide new insights on subsurface hydrology based on the ratio of P-wave and S-wave velocity structures.
Joeri Brackenhoff, Jan Thorbecke, and Kees Wapenaar
Solid Earth, 10, 1301–1319, https://doi.org/10.5194/se-10-1301-2019, https://doi.org/10.5194/se-10-1301-2019, 2019
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Earthquakes in the subsurface are hard to monitor due to their complicated signals. We aim to make the monitoring of the subsurface possible by redatuming the sources and the receivers from the surface of the Earth to the subsurface to monitor earthquakes originating from small faults in the subsurface. By using several sources together, we create complex earthquake signals for large-scale faults sources.
Peter Klin, Giovanna Laurenzano, Maria Adelaide Romano, Enrico Priolo, and Luca Martelli
Solid Earth, 10, 931–949, https://doi.org/10.5194/se-10-931-2019, https://doi.org/10.5194/se-10-931-2019, 2019
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Using geological and geophysical data, we set up a 3-D digital description of the underground structure in the central part of the Po alluvial plain. By means of computer-simulated propagation of seismic waves, we were able to identify the structural features that caused the unexpected elongation and amplification of the earthquake ground motion that was observed in the area during the 2012 seismic crisis. The study permits a deeper understanding of the seismic hazard in alluvial basins.
Andrew J. Calvert and Michael P. Doublier
Solid Earth, 10, 637–645, https://doi.org/10.5194/se-10-637-2019, https://doi.org/10.5194/se-10-637-2019, 2019
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Deep (> 40 km) seismic reflection surveys are acquired on land along crooked roads. Using the varying azimuth between source and receiver, the true 3-D orientation of crustal structures can be determined. Applying this method to a survey over the ancient Australian Yilgarn Craton reveals that most reflectors in the lower crust exhibit a systematic dip perpendicular to those in the overlying crust, consistent with lateral flow of a weak lower crust in the hotter early Earth 2.7 billion years ago.
Ruth A. Beckel and Christopher Juhlin
Solid Earth, 10, 581–598, https://doi.org/10.5194/se-10-581-2019, https://doi.org/10.5194/se-10-581-2019, 2019
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Scandinavia is crossed by extensive fault scarps that have likely been caused by huge earthquakes when the ice sheets of the last glacial melted. Due to the inaccessibility of the terrain, reflection seismic data have to be collected along crooked lines, which reduces the imaging quality unless special corrections are applied. We developed a new correction method that is very tolerant to noise and used it to improve the reflection image of such a fault and refine its geological interpretation.
Kees Wapenaar, Joeri Brackenhoff, and Jan Thorbecke
Solid Earth, 10, 517–536, https://doi.org/10.5194/se-10-517-2019, https://doi.org/10.5194/se-10-517-2019, 2019
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The earthquake seismology and seismic exploration communities have developed a variety of seismic imaging methods for passive- and active-source data. Despite the seemingly different approaches and underlying principles, many of these methods are based in some way or another on the same mathematical theorem. Starting with this theorem, we discuss a variety of classical and recent seismic imaging methods in a systematic way and explain their similarities and differences.
George Taylor, Sebastian Rost, Gregory A. Houseman, and Gregor Hillers
Solid Earth, 10, 363–378, https://doi.org/10.5194/se-10-363-2019, https://doi.org/10.5194/se-10-363-2019, 2019
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We constructed a seismic velocity model of the North Anatolian Fault in Turkey. We found that the fault is located within a region of reduced seismic velocity and skirts the edges of a geological unit that displays high seismic velocity, indicating that this unit could be stronger than the surrounding material. Furthermore, we found that seismic waves travel fastest in the NE–SW direction, which is the direction of maximum extension for this part of Turkey and indicates mineral alignment.
Haruo Sato
Solid Earth, 10, 275–292, https://doi.org/10.5194/se-10-275-2019, https://doi.org/10.5194/se-10-275-2019, 2019
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Recent seismological observations clarified that the velocity structure of the crust and upper mantle is randomly heterogeneous. I compile reported power spectral density functions of random velocity fluctuations based on various types of measurements. Their spectral envelope is approximated by the third power of wavenumber. It is interesting to study what kinds of geophysical processes created such a power-law spectral envelope at different scales and in different geological environments.
Peter Gaebler, Lars Ceranna, Nima Nooshiri, Andreas Barth, Simone Cesca, Michaela Frei, Ilona Grünberg, Gernot Hartmann, Karl Koch, Christoph Pilger, J. Ole Ross, and Torsten Dahm
Solid Earth, 10, 59–78, https://doi.org/10.5194/se-10-59-2019, https://doi.org/10.5194/se-10-59-2019, 2019
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On 3 September 2017 official channels of the Democratic People’s Republic of
Korea announced the successful test of a nuclear device. This study provides a
multi-technology analysis of the 2017 North Korean event and its aftermath using a wide array of geophysical methods (seismology, infrasound, remote sensing, radionuclide monitoring, and atmospheric transport modeling). Our results clearly indicate that the September 2017 North Korean event was in fact a nuclear test.
Claudia Werner and Erik H. Saenger
Solid Earth, 9, 1487–1505, https://doi.org/10.5194/se-9-1487-2018, https://doi.org/10.5194/se-9-1487-2018, 2018
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Time reverse imaging is a method for locating quasi-simultaneous or low-amplitude earthquakes. Numerous three-dimensional synthetic simulations were performed to discover the influence of station distributions, complex velocity models and high noise rates on the reliability of localisations. The guidelines obtained enable the estimation of the localisation success rates of an existing station set-up and provide the basis for designing new arrays.
Cited articles
AlpArray: AlpArray Seismic Network, AlpArray Seismic Network (AASN) temporary
component, AlpArray Working Group, Other/Seismic Network,
https://doi.org/10.12686/alparray/z3_2015, 2015. a
AlpArray-EASI: AlpArray Seismic Network, Eastern Alpine Seismic Investigation
(EASI) – AlpArray Complimentary Experiment. AlpArray Working Group,
Other/Seismic Network, https://doi.org/10.12686/alparray/xt_2014, 2014. a
Barmin, M. P., Ritzwoller, M. H., and Levshin, A. L.: A Fast and Reliable
Method for Surface Wave Tomography, Pure Appl. Geophys., 158, 1351–1375,
https://doi.org/10.1007/PL00001225,
2001. a, b
Behm, M., Brückl, E., Chwatal, W., and Thybo, H.: Application of stacking
and inversion techniques to three-dimensional wide-angle reflection and
refraction seismic data of the Eastern Alps, Geophys. J.
Int., 170, 275–298, https://doi.org/10.1111/j.1365-246X.2007.03393.x,
2007a. a, b, c, d
Behm, M., Bruckl, E., Mitterbauer, U., CELEBRATION 2000, and ALP 2002 Working Groups:
A New Seismic Model of the Eastern Alps and its Relevance for Geodesy and
Geodynamics, Vermessung and Geoinformation, 2, 121–133, 2007b. a
Behm, M., Nakata, N., and Bokelmann, G.: Regional Ambient Noise Tomography in
the Eastern Alps of Europe, Pure Appl. Geophys., 173, 2813–2840,
https://doi.org/10.1007/s00024-016-1314-z, 2016. a, b, c, d
Bensen, G. D., Ritzwoller, M. H., Barmin, M. P., Levshin, A. L., Lin, F.,
Moschetti, M. P., Shapiro, N. M., and Yang, Y.: Processing seismic ambient
noise data to obtain reliable broad-band surface wave dispersion
measurements, Geophys. J. Int., 169, 1239–1260,
https://doi.org/10.1111/j.1365-246X.2007.03374.x, 2007. a, b, c, d, e
Bianchi, I., Miller, M. S., and Bokelmann, G.: Insights on the upper mantle
beneath the Eastern Alps, Earth Planet. Sc. Lett., 403, 199–209,
https://doi.org/10.1016/j.epsl.2014.06.051, 2014. a
Bianchi, I., Behm, M., Rumpfhuber, E. M., and Bokelmann, G.: A New Seismic
Data Set on the Depth of the Moho in the Alps, Pure Appl. Geophys.s,
172, 295–308, https://doi.org/10.1007/s00024-014-0953-1, 2015. a
Bleibinhaus, F. and Gebrande, H.: Crustal structure of the Eastern Alps along
the TRANSALP profile from wide-angle seismic tomography, Tectonophysics,
414, 51–69, https://doi.org/10.1016/j.tecto.2005.10.028, 2006. a
Brückl, E., Bleibinhaus, F., Gosar, A., Grad, M., Guterch, A.,
Hrubcová Palva, P., Keller, G., Majdański, M., Sumanovac, F., Tiira, T.,
Yliniemi, J., Hegedűs, E., and Thybo, H.: Crustal structure due to
collisional and escape tectonics in the Eastern Alps region based on
profiles Alp01 and Alp02 from the ALP 2002 seismic experiment, J.
Geophys. Res., 112, B06308, https://doi.org/10.1029/2006JB004687, 2007. a
Brückl, E., Behm, M., Decker, K., Grad, M., Guterch, A., Keller, G., and
Thybo, H.: Crustal Structure and Active Tectonics in the Eastern Alps,
Tectonics, 29, TC2011, https://doi.org/10.1029/2009TC002491, 2010. a, b
BW: BayernNetz, Department of Earth and Environmental Sciences, Geophysical
Observatory, University of Munchen, International Federation of Digital
Seismograph Networks, Other/Seismic Network, https://doi.org/10.7914/SN/BW, 2001. a
Campillo, M., Singh, S., Shapiro, N., Pacheco, J., and Herrmann, R.: Crustal
structure South of Mexican Volcanic belt based on group velocity dispersion,
Geofis. Int., 35, 361–370, https://doi.org/10.1016/j.crte.2011.07.007, 1996. a
CH: Swiss Seismological Service, National Seismic Networks of Switzerland,
Swiss Seismological Service, ETH Zürich,
https://doi.org/10.12686/sed/networks/ch, 1983. a
Cupillard, P. and Capdeville, Y.: On the amplitude of surface waves obtained
by noise correlation and the capability to recover the attenuation: a
numerical approach, Geophys. J. Int., 181, 1687–1700,
https://doi.org/10.1111/j.1365-246X.2010.04586.x, 2010. a
Diehl, T.: 3-D Seismic Velocity Models of the Alpine Crust from Local
Earthquake Tomography, Ph.D. thesis, ETH Zurich,
https://doi.org/10.3929/ethz-a-005691675, 2008. a
Favaro, S., Handy, M. R., Scharf, A., and Schuster, R.: Changing patterns of
exhumation and denudation in front of an advancing crustal indenter, Tauern
Window (Eastern Alps), Tectonics, 36, 1053–1071,
https://doi.org/10.1002/2016TC004448,
2017. a, b
Frisch, W., Kuhleman, J., Dunkl, I., and Brügel, A.: Palinspastic
reconstruction and topographic evolution of the Eastern Alps during late
Tertiary tectonic extrusion, Tectonophysics, 279, 1–15, 1998. a
Fry, B., Deschamps, F., Kissling, E., Stehly, L., and Giardini, D.: Layered
azimuthal anisotropy of Rayleigh wave phase velocities in the European Alpine
lithosphere inferred from ambient noise, Earth Planet. Sc. Lett., 297,
95–102, 2010. a
Gebrande, H., Lüschen, E., Bopp, M., Bleibinhaus, F., Lammerer, B., Oncken,
O., Stiller, M., Kummerow, J., Kind, R., Millahn, K., Grassl, H., Neubauer,
F., Bertelli, L., Borrini, D., Fantoni, R., Pessina, C., Sella, M.,
Castellarin, A., Nicolich, R., Mazzotti, A., and Bernabini, M.: First deep
seismic reflection images of the Eastern Alps reveal giant crustal wedges and
transcrustal ramps, Geophys. Res. Lett., 29, 92-1–92-4,
https://doi.org/10.1029/2002GL014911,
2002. a
Gebrande, H., Castellarin, A., Lüschen, E., Millahn, K., Neubauer, F., and
Nicolich, R.: TRANSALP – A transect through a young collisional orogen:
Introduction, Tectonophysics, 414, 1–7,
https://doi.org/10.1016/j.tecto.2005.10.030,
tRANSALP, 2006. a
Genser, J. and Neubauer, F.: Low angle normal faults at the Eastern margin of
the Tauern window (Eastern Alps), Mitt. Österr. Geol. Ges., 81,
233–243, 1989. a
GFZ: GEOFON and EIDA Data Archives, available at: http://eida.gfz-potsdam.de/webdc3/, last access: 30 July 2020.
GR: German Regional Seismic Network, Operated by Seismogisches
Zentralobseratorium (GRF), Germany, 2001. a
Hamilton, W., Wagner, L., and Wessely, G.: Oil and Gas in Austria, in:
Mitteilungen der Österreichischen Geologischen Gesellschaft, edited by:
Neubauer, F. and Höck, V., Vol. 92, Wien, 235–262, 2000. a
Handy, M., Ustaszewski, K., and Kissling, E.: Reconstructing the
Alps–Carpathians–Dinarides as a key to understanding switches in subduction
polarity, slab gaps and surface motion, Int. J. Earth
Sci., 104, 1–26, https://doi.org/10.1007/s00531-014-1060-3, 2015. a, b, c
Handy, M. R., Schmid, S. M., Bousquet, R., Kissling, E., and Bernoulli, D.:
Reconciling plate-tectonic reconstructions of Alpine Tethys with the
geological–geophysical record of spreading and subduction in the Alps,
Earth-Sci. Rev., 102, 121–158, https://doi.org/10.1016/j.earscirev.2010.06.002,
2010. a
Hansen, P. C. and O'Leary, D. P.: The Use of the L-curve in the Regularization
of Discrete Ill-posed Problems, SIAM J. Sci. Comput., 14, 1487–1503,
https://doi.org/10.1137/0914086,
1993. a
Herrmann, R. B.: Computer Programs in Seismology: An Evolving Tool for
Instruction and Research, Seismol. Res. Lett., 84, 1081,
https://doi.org/10.1785/0220110096, 2013. a
Hetényi, G., Molinari, I., Clinton, J., Bokelmann, G., Bondár, I.,
Crawford, W. C., Dessa, J.-X., Doubre, C., Friederich, W., Fuchs, F.,
Giardini, D., Gráczer, Z., Handy, M. R., Herak, M., Jia, Y., Kissling,
E., Kopp, H., Korn, M., Margheriti, L., Meier, T., Mucciarelli, M., Paul, A.,
Pesaresi, D., Piromallo, C., Plenefisch, T., Plomerová, J., Ritter, J.,
Rümpker, G., Šipka, V., Spallarossa, D., Thomas, C., Tilmann, F.,
Wassermann, J., Weber, M., Wéber, Z., Wesztergom, V., Živčić, M., Abreu, R., Allegretti, I., Apoloner, M.-T., Aubert, C.,
Besançon, S., Bès de Berc, M., Brunel, D., Capello, M., Čarman,
M., Cavaliere, A., Chèze, J., Chiarabba, C., Cougoulat, G., Cristiano,
L., Czifra, T., D'Alema, E., Danesi, S., Daniel, R., Dannowski, A.,
Dasović, I., Deschamps, A., Egdorf, S., Fiket, T., Fischer, K., Funke,
S., Govoni, A., Gröschl, G., Heimers, S., Heit, B., Herak, D., Huber, J.,
Jarić, D., Jedlička, P., Jund, H., Klingen, S., Klotz, B.,
Kolínský, P., Kotek, J., Kühne, L., Kuk, K., Lange, D., Loos,
J., Lovati, S., Malengros, D., Maron, C., Martin, X., Massa, M., Mazzarini,
F., Métral, L., Moretti, M., Munzarová, H., Nardi, A., Pahor, J.,
Péquegnat, C., Petersen, F., Piccinini, D., Pondrelli, S., Prevolnik, S.,
Racine, R., Régnier, M., Reiss, M., Salimbeni, S., Santulin, M., Scherer,
W., Schippkus, S., Schulte-Kortnack, D., Solarino, S., Spieker, K., Stipčević, J., Strollo, A., Süle, B., Szanyi, G., Szűcs, E.,
Thorwart, M., Ueding, S., Vallocchia, M., Vecsey, L., Voigt, R., Weidle, C.,
Weyland, G., Wiemer, S., Wolf, F., Wolyniec, D., Zieke, T., Team, A. S. N.,
Lab, E.-S. E., Crew, A. O. C., and Group, A. W.: The AlpArray Seismic
Network: A Large-Scale European Experiment to Image the Alpine Orogen,
Surv. Geophys., 39, 1009–1033, https://doi.org/10.1007/s10712-018-9472-4, 2018a. a, b
Hetényi, G., Plomerová, J., Bianchi, I., Exnerová, H. K.,
Bokelmann, G., Handy, M. R., and Babu\,̌ska, V.: From mountain summits to
roots: Crustal structure of the Eastern Alps and Bohemian Massif along
longitude 13.3∘ E, Tectonophysics, 744, 239–255,
https://doi.org/10.1016/j.tecto.2018.07.001,
2018b. a, b
Horváth, F., Bada, G., Szafián, P., Tari, G., Ádáam, A., and
Cloetingh, S.: Formation and deformation of the Pannonian Basin: constraints
from observational data, Geological Society, London, Memoirs, 32, 191–206,
https://doi.org/10.1144/GSL.MEM.2006.032.01.11, 2006. a, b, c
HU: Kövesligethy Radó Seismological Observatory, Geodetic and
Geophysical Institute, Research Centre for Astronomy and Earth Sciences,
Hungarian Academy of Sciences (MTA CSFK GGI KRSZO), Hungarian National
Seismological Network, Deutsches GeoForschungsZentrum GFZ, Other/Seismic
Network, https://doi.org/10.14470/UH028726, 1992. a
Hua, Y., Zhao, D., and Xu, Y.: P wave anisotropic tomography of the Alps,
J. Geophys. Res.-Sol. Ea., 122, 4509–4528,
https://doi.org/10.1002/2016JB013831, 2017. a
INGV: Seismological Data Centre, Rete Sismica Nazionale (RSN). Istituto
Nazionale di Geofisica e Vulcanologia (INGV), Italy,
https://doi.org/10.13127/sd/x0fxnh7qfy, 2006. a
Juretzek, C. and Hadziioannou, C.: Where do ocean microseisms come from? A
study of Love-to-Rayleigh wave ratios, J. Geophys. Res., 121, 6741–6756,
https://doi.org/10.1002/2016JB013017, 2016. a
Karousová, H., Plomerova, J., and Babuska, V.: Upper-mantle structure
beneath the southern Bohemian Massif and its surroundings imaged by
high-resolution tomography, Geophys. J. Int., 194,
1203–1215, https://doi.org/10.1093/gji/ggt159, 2013. a
Kästle, E. D., El-Sharkawy, A., Boschi, L., Meier, T., Rosenberg, C.,
Bellahsen, N., Cristiano, L., and Weidle, C.: Surface Wave Tomography of the
Alps Using Ambient-Noise and Earthquake Phase Velocity Measurements, J. Geophys. Res.-Sol. Ea., 123, 1770–1792,
https://doi.org/10.1002/2017JB014698,
2018. a, b, c, d, e, f, g, h, i, j, k
Kästle, E. D., Rosenberg, C., Boschi, L., Bellahsen, N., Meier, T., and El-Sharkawy, A.: Slab Break-offs in the Alpine Subduction Zone, Solid Earth Discuss., https://doi.org/10.5194/se-2019-17, 2019. a
Kissling, E., Schmid, S. M., Lippitsch, R., Ansorge, J., and Fugenschuh, B.:
Lithosphere structure and tectonic evolution of the Alpine arc: new evidence
from high-resolution teleseismic tomography, Geol. Soc. London. Memoirs, 32,
129–145, https://doi.org/10.1144/GSL.MEM.2006.032.01.08, 2006. a
Le Breton, E., Handy, M. R., Molli, G., and Ustaszewski, K.: Post-20 Ma Motion
of the Adriatic Plate: New Constraints From Surrounding Orogens and
Implications for Crust-Mantle Decoupling, Tectonics, 36, 3135–3154,
https://doi.org/10.1002/2016TC004443,
2017. a
Levshin, A. L. and Ke\ĭlis-Borok, V. I.: Seismic surface waves in a
laterally inhomogeneous Earth, Kluwer Academic Publishers, Dordrecht,
Boston, 1989. a
Linzer, H.-G., Decker, K., Peresson, H., Dell'Mour, R., and Frisch, W.:
Balancing lateral orogenic float of the Eastern Alps, Tectonophysics, 354,
211–237, https://doi.org/10.1016/S0040-1951(02)00337-2, 2002. a
Lippitsch, R., Kissling, E., and Ansorge, J.: Upper mantle structure beneath
the Alpine orogen from high-resolution tomography, J. Geophys. Res., 108,
2376, https://doi.org/10.1029/2002JB002016, 2003. a
Merlini, S., Goglioni, C., Fantoni, R., and Ponton, M.: Analisi strutturale
lungo un profilo geologico tra la linea Fella-Savae l'avampaese adriatico
(Friuli Venezia Giulia-Italia), Mem. Soc. Geol. It, 57, 293–300, 293–300, 2002. a
Mitterbauer, U., Behm, M., Brückl, E., Lippitsch, R., Guterch, A.,
Keller, G., Koslovskaya, E., Rumpfhuber, E., and Sumanovac., F.: Shape and
origin of the East-Alpine slab constrained by the ALPASS teleseismic
model, Tectonophysics, 510, 195–206, https://doi.org/10.1016/j.tecto.2011.07.001,
2011. a
Molinari, I., Verbeke, J., Boschi, L., Kissling, E., and Morelli, A.: Italian
and Alpine three-dimensional crustal structure imaged by ambient-noise
surface-wave dispersion, Geochem. Geophy. Geosy., 16,
4405–4421, https://doi.org/10.1002/2015GC006176, 2015. a
Nicolson, H., Curtis, A., Baptie, B., and Galetti, E.: Seismic interferometry
and ambient noise tomography in the British Isles, P.
Geol. Assoc., 123, 74–86,
https://doi.org/10.1016/j.pgeola.2011.04.002,
2012. a
OE: ZAMG-Zentralanstalt Für Meterologie Und Geodynamik, Austrian Seismic Network, International Federation of Digital Seismograph Networks, https://doi.org/10.7914/SN/OE, 1987. a
Poli, P., Pedersen, H. A., Campillo, M., and the POLENET/LAPNET Working Group: Noise directivity and group
velocity tomography in a region with small velocity contrasts: the northern
Baltic shield, Geophys. J. Int., 192, 413–424,
https://doi.org/10.1093/gji/ggs034, 2013. a, b
Pomella, H., Klötzli, U., Scholger, R., Stipp, M., and Fügenschuh, B.:
The Northern Giudicarie and the Meran-Mauls fault (Alps, Northern Italy) in
the light of new paleomagnetic and geochronological data from boudinaged
Eo-/Oligocene tonalites, Int. J. Earth Sci., 100,
1827–1850, https://doi.org/10.1007/s00531-010-0612-4, 2011. a
Qorbani, E., Bianchi, I., and Bokelmann, G.: Slab detachment under the Eastern
Alps seen by seismic anisotropy, Earth Planet. Sc. Lett., 409, 96–108,
https://doi.org/10.1016/j.epsl.2014.10.049, 2015. a
Ratschbacher, L., Merle, O., Davy, P., and Cobbold, P.: Lateral extrusion in
the eastern Alps, part I: Boundary conditions and experiments scaled for
gravity, Tectonics, 10, 245–256, https://doi.org/10.1029/90TC02622, 1991a. a, b, c
Ren, Y., Grecu, B., Stuart, G., Houseman, G., and Hegedüs, E.: Crustal
structure of the Carpathian–Pannonian region from ambient noise tomography,
Geophys. J. Int., 195, 1351–1369, https://doi.org/10.1093/gji/ggt316, 2013. a, b
Rhie, J. and Romanowicz, B.: Excitation of Earth's continuous free
oscillations by atmosphere–ocean–seafloor coupling, Nature, 431, 552, https://doi.org/10.1038/nature02942, 2004. a
Rosenberg, C., Schneider, S., Scharf, A., Bertrand, A., Hammerschmidt, K.,
Rabaute, A., and Brun, J.: Relating collisional kinematics to exhumation
processes in the Eastern Alps, Earth-Sci. Rev., 176, 311–344,
https://doi.org/10.1016/j.earscirev.2017.10.013, 2018. a, b, c
Royden, L. and Baldi, T.: Early Cenozoic tectonics and paleogeography of the
Pannonain and surrounding regions, in: The Pannonian Basin: A Study in
Basin Evolution, edited by: Royden, L. and Horvath, F., Vol. 45, AAPG Memoir, 1–16,
1988. a
Scharf, A., Handy, M., Favaro, S., Schmid, S., and Bertrand, A.: Modes of
orogen-parallel stretching and extensional exhumation in response to
microplate indentation and roll-back subduction (Tauern Window, Eastern
Alps), Int. J. Earth Sc., 102, 1627–1654,
https://doi.org/10.1007/s00531-013-0894-4, 2013. a, b, c, d
Scharf, A., Handy, M. R., Schmid, S. M., Favaro, S., Sudo, M., Schuster, R.,
and Hammerschmidt, K.: Grain-size effects on the closure temperature of
white mica in a crustal-scale extensional shear zone — Implications of
in-situ 40Ar/39Ar laser-ablation of white mica for dating shearing and
cooling (Tauern Window, Eastern Alps), Tectonophysics, 674, 210–226,
https://doi.org/10.1016/j.tecto.2016.02.014,
2016. a
Schmid, S., Bernoulli, D., Fügenschuh, B., Matenco, L., Schefer, S.,
Schuster, R., Tischler, M., and Ustaszewski, K.: The
Alpine-Carpathian-Dinaridic orogenic system: correlation and evolution of
tectonic units, Swiss J. Geosci., 101, 139–183,
https://doi.org/10.1007/s00015-008-1247-3, 2008. a
Schonborn, G.: Alpine tectonics and kinematic models of the central southern
Alps, Memorie di Scienze Geologiche, 44, 229–393, 1992. a
Schuster, R., Koller, F., Hoeck, V., Hoinkes, G., and Bousquet, R.:
Explanatory notes to the map: Metamorphic structure of the Alps –
Metamorphic evolution of the Eastern Alps, Mitteilungen der
Österreichischen Mineralogischen Gesellschaft, 149, 175–199, 2004. a
Seats, K. J., Lawrence, J. F., and Prieto, G. A.: Improved ambient noise
correlation functions using Welch's method, Geophys. J. Int., 188, 513–523,
https://doi.org/10.1111/j.1365-246X.2011.05263.x, 2012. a
Selverstone, J.: Evidence for east-west crustal extension in the Eastern Alps:
Implications for the unroofing history of the Tauern window, Tectonics, 7,
87–105, https://doi.org/10.1029/TC007i001p00087, 1988. a
Shapiro, N. M. and Campillo, M.: Emergence of broadband Rayleigh waves from
correlations of the ambient seismic noise, Geophys. Res. Lett., 31,
l07614, https://doi.org/10.1029/2004GL019491, 2004. a, b, c, d
Shapiro, N. M., Campillo, M., Stehly, L., and Ritzwoller, M. H.:
High-Resolution Surface-Wave Tomography from Ambient Seismic Noise,
Science, 307, 1615–1618, https://doi.org/10.1126/science.1108339, 2005. a
SI: Province Südtirol seismic network, Operated by ZAMG – Central
Institute for Meteorology and Geodynamics, 2006. a
SK: National Network of Seismic Stations of Slovakia, ESI SAS (Earth Science
Institute of the Slovak Academy of Sciences), Deutsches GeoForschungsZentrum
GFZ, https://doi.org/10.14470/fx099882, 2001. a
SL: Slovenian Environment Agency , Seismic Network of the Republic of
Slovenia, International Federation of Digital Seismograph Networks.
Other/Seismic Network, https://doi.org/10.7914/SN/SL, 2001. a
Spada, M., Bianchi, I., Kissling, E., Agostinetti, N. P., and Wiemer, S.:
Combining controlled-source seismology and receiver function information to
derive 3-D Moho topography for Italy, Geophys. J. Int.,
194, 1050–1068, https://doi.org/10.1093/gji/ggt148, 2013. a, b, c
Stehly, L., Fry, B., Campillo, M., Shapiro, N. M., Guilbert, J., Boschi, L.,
and Giardini, D.: Tomography of the Alpine region from observations of
seismic ambient noise, Geophys. J. Int., 178, 338–350,
https://doi.org/10.1111/j.1365-246X.2009.04132.x, 2009. a, b, c, d
Steininger, F. and Wessely, G.: From the Tethyan Ocean to the Paratethys Sea:
Oligocene to Neogene stratigraphy, paleogeography and paleobiogeography of
the circum-Mediterranean region and the Oligocene to Neogene Basin evolution
in Austria, in: Mitteilungen der Österreichischen Geologischen
Gesellschaft, edited by: Neubauer, F. and Höck, V., Vol. 92, Wien, 92, 95–116, 2000. a
Verbeke, J., Boschi, L., Stehly, L., Kissling, E., and Michelini, A.:
High-resolution Rayleigh-wave velocity maps of central Europe from a dense
ambient-noise data set, Geophys. J. Int., 188, 1173–1187,
https://doi.org/10.1111/j.1365-246X.2011.05308.x, 2012. a, b, c
Waldhauser, F., Lippitsch, R., Kissling, E., and Ansorge, J.: High-resolution
teleseismic tomography of upper-mantle structure using an a priori
three-dimensional crustal model, Geophys. J. Int., 150,
403–414, https://doi.org/10.1046/j.1365-246X.2002.01690.x, 2002. a
Wapenaar, K.: Retrieving the Elastodynamic Green's Function of an Arbitrary
Inhomogeneous Medium by Cross Correlation, Phys. Rev. Lett., 93, 254301,
https://doi.org/10.1103/PhysRevLett.93.254301, 2004. a
Yang, Y. and Ritzwoller, M. H.: Characteristics of ambient seismic noise as a
source for surface wave tomography, Geochem. Geophy. Geosy., 9, q02008,
https://doi.org/10.1029/2007GC001814, 2008. a, b
Zigone, D., Ben-Zion, Y., Campillo, M., and Roux, P.: Seismic Tomography of
the Southern California Plate Boundary Region from Noise-Based Rayleigh and
Love Waves, Pure Appl. Geophys., 172, 1007–1032,
https://doi.org/10.1007/s00024-014-0872-1, 2015. a, b
Short summary
The crustal structure of the Eastern and Southern Alps is complex. Although several seismological studies have targeted the crust, the velocity structure under this area is still not fully understood. Here we study the crustal velocity structure using seismic ambient noise tomography. Our high-resolution models image several velocity anomalies and contrasts and reveal details of the crustal structure. We discuss our new models of the crust with respect to the geologic and tectonic features.
The crustal structure of the Eastern and Southern Alps is complex. Although several...
