Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate‐Size Earthquakes
| العنوان: | Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate‐Size Earthquakes |
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| المؤلفون: | Mathieu Causse, I. Dumont, Frank L. Vernon, Florent Brenguier, Jean-Paul Ampuero, A. Mordret, Christophe Voisin, Pierre Boué |
| المساهمون: | Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] (EAPS), Massachusetts Institute of Technology (MIT), Institut des Sciences de la Terre (ISTerre), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA), University of California [San Diego] (UC San Diego), University of California, Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), University of California (UC), European Project: 817803,FaultScan, European Project: 742335,F-IMAGE |
| المصدر: | Geophysical Research Letters Geophysical Research Letters, American Geophysical Union, 2020, 47 (17), pp.e2020GL088563. ⟨10.1029/2020GL088563⟩ Geophysical Research Letters, 2020, 47 (17), pp.e2020GL088563. ⟨10.1029/2020GL088563⟩ |
| بيانات النشر: | HAL CCSD, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Seismometer, 010504 meteorology & atmospheric sciences, Earthquake Source Observations, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Satellite Geodesy: Results, Kinematics, Fault (geology), 010502 geochemistry & geophysics, 01 natural sciences, Large earthquakes, Body Waves, Earthquake Dynamics, Interferometric synthetic aperture radar, Research Letter, Geodesy and Gravity, Solid Earth, Seismology, 0105 earth and related environmental sciences, geography, geography.geographical_feature_category, Research Letters, Seismic Cycle Related Deformations, Tectonics, Geophysics, 13. Climate action, [SDU]Sciences of the Universe [physics], General Earth and Planetary Sciences, Geology |
| الوصف: | Although moderate‐size earthquakes are poorly studied by lack of near‐fault observations, they can provide key information about larger damaging earthquakes. Here we propose a new approach, inspired by double‐difference relocation, that uses high‐coherency waveforms recorded at neighboring sensors, to study the preparation phase and dynamics of moderate‐size earthquakes. We validate this technique by analyzing the 2016, Mw5.2 Borrego Springs earthquake in Southern California and find consistent rupture velocities of 2 km/s highlighting two main rupture asperities. The analysis of the 2019, Ml5.2 Le Teil earthquake in France reveals slow nucleation at depth that migrates to the surface and propagates northward with a velocity of ∼2.8 km/s, highlighting two main rupture events also imaged by InSAR. By providing unprecedented resolution in our observation of the rupture dynamics, this approach will be useful in better understanding the preparation phase and rupture of both tectonic and induced earthquakes. Key Points Stereometry uses stereoscopic effect to study intermediate‐size earthquake sourcesStereometry retrieves finite fault rupture parameters such as direction, length, and speedStereometry can reveal the activity of a single fault patch before an earthquake |
| وصف الملف: | text/pdf |
| اللغة: | English |
| تدمد: | 0094-8276 1944-8007 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f192d62691e2538112f846598da3d3c https://hal.univ-grenoble-alpes.fr/hal-02932273/file/2020GL088563.pdf |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....8f192d62691e2538112f846598da3d3c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00948276 19448007 |
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