The nucleation of the Izmit and Düzce earthquakes: some mechanical logic on where and how ruptures began
| Autor: | Jean Schmittbuhl, David Marsan, Serdar Özalaybey, Mustafa Aktar, Hayrullah Karabulut, Michel Bouchon, Marie-Paule Bouin |
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| Přispěvatelé: | 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), Kandilli Observatory and Earthquake Research Institute (KOERI), Boǧaziçi üniversitesi = Boğaziçi University [Istanbul], TUBITAK Marmara Research Center (TUNITAK-MAM), Institut Terre Environnement Strasbourg (ITES), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Boğaziçi University [Istanbul], Institut de Physique du Globe de Paris (IPGP (UMR_7154)), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2021 |
| Předmět: |
geography
Dynamics and mechanics of faulting geography.geographical_feature_category 010504 meteorology & atmospheric sciences Earthquake source observations [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Nucleation Transform fault North Anatolian Fault Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Transform faults Natural (archaeology) Geophysics 13. Climate action Geochemistry and Petrology Transition zone Aseismic slip Seismology Geology 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Journal International Geophysical Journal International, Oxford University Press (OUP), 2021, 225 (3), pp.1510-1517. ⟨10.1093/gji/ggab040⟩ Geophysical Journal International, 2021, 225 (3), pp.1510-1517. ⟨10.1093/gji/ggab040⟩ |
| ISSN: | 1365-246X 0956-540X |
| Popis: | SUMMARYIn spite of growing evidence that many earthquakes are preceded by increased seismic activity, the nature of this activity is still poorly understood. Is it the result of a mostly random process related to the natural tendency of seismic events to cluster in time and space, in which case there is little hope to ever predict earthquakes? Or is it the sign that a physical process that will lead to the impending rupture has begun, in which case we should attempt to identify this process. With this aim we take a further look at the nucleation of two of the best recorded and documented strike-slip earthquakes to date, the 1999 Izmit and Düzce earthquakes which ruptured the North Anatolian Fault over ∼200 km. We show the existence of a remarkable mechanical logic linking together nucleation characteristics, stress loading, fault geometry and rupture speed. In both earthquakes the observations point to slow aseismic slip occurring near the ductile-to-brittle transition zone as the motor of their nucleation. |
| Databáze: | OpenAIRE |
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