Kinematics and Dynamics of the 24 January 2020 M_w 6.7 Elazig, Turkey Earthquake
Abstract
We determine rupture kinematics of the 2020 M_w 6.7 Elazig, Turkey earthquake from joint inversion of interferometric synthetic aperture radar (InSAR) measurements, regional 1 Hz Global Navigation Satellite System (GNSS), strong motion, and teleseismic waveforms, and we also use dynamic modeling to assess the faulting properties to explain the observed kinematics. Our work shows that this event predominantly ruptured unilaterally toward the SW along the East Anatolian Fault Zone at a speed as slow as 2.0 km/s for ~20 s, and three main asperities are formed with a depth ranging from 20 km to the surface, but the surface rupture seems negligible. Besides, the dynamic model reveals an initial heterogeneous stress distribution with variations up to 30 MPa, which has been probably built up during the interseismic period. While this event does not seem to promote the failure of Pazarcık seismic gap, it remains elusive to evaluate the disturbed seismic potential between Elazig and Bingol regions.
Additional Information
© 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Issue Online: 18 November 2020; Version of Record online: 18 November 2020; Accepted manuscript online: 06 November 2020; Manuscript accepted: 18 October 2020; Manuscript revised: 16 September 2020; Manuscript received: 07 September 2020. We thank the Turkish scientists operating the National Permanent GNSS/RTK Network (TUSAGA‐Aktif/CORSTR administrated by General Directorate of Land Registry and Cadastre‐TKGM and General Directorate of Mapping‐HGM, Ankara, Turkey) and the AFAD providing seismological data. We thank Jean‐Philippe Avouac for his helpful suggestions. This research was funded by the Young Talent Promotion Project of China Association for Science and Technology, the National Natural Science Foundation of China (Grant 41922024), Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology (Grant ZDSYS20190902093007855), and SZSTI (Shenzhen Science, Technology and Innovation Commission) Program (Grant JCYJ20170817104236221). Data Availability Statement: Original Sentinel‐1 data were acquired and processed by European Space Agency Copernicus program (https://scihub.copernicus.eu/) and retrieved from Alaska Satellite Facility Distributed Active Archive Center; these data are stored online (https://zenodo.org/record/4031927). High‐rate GNSS displacement waveforms were provided by Melgar et al. (2020); strong motion records were provided by Disaster And Emergency Management Presidency of Turkey (AFAD) (https://tadas.afad.gov.tr/event‐detail/8071). Teleseimic waveforms were obtained through the Data Management Center of the Incorporated Research Institutions for Seismology (https://ds.iris.edu/wilber3/find_stations/11175173). All of the links are last accessed 2020 September. Most of the figures in this paper were prepared using Generic Mapping Tools (Wessel et al., 2013).Attached Files
Published - 2020EA001452.pdf
Supplemental Material - ess2703-sup-0001-2020ea001452-si.docx
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Additional details
- Eprint ID
- 106494
- Resolver ID
- CaltechAUTHORS:20201106-123649341
- Young Talent Promotion Project of China Association for Science and Technology
- 41922024
- National Natural Science Foundation of China
- ZDSYS20190902093007855
- Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology
- JCYJ20170817104236221
- Shenzhen Science, Technology and Innovation Commission
- Created
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2020-11-06Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field