TY - JOUR
T1 - Dynamic Rupture Process of the 2023 Mw 7.8 Kahramanmaraş Earthquake (SE Türkiye): Variable Rupture Speed and Implications for Seismic Hazard
AU - Wang, Zijia
AU - Zhang, Wenqiang
AU - Taymaz, Tuncay
AU - He, Zhongqiu
AU - Xu, Tianhong
AU - Zhang, Zhenguo
N1 - KAUST Repository Item: Exported on 2023-09-06
Acknowledgements: The authors are grateful to Editor Germán Prieto, and two anonymous reviewers for their constructive comments. We thank Dr. Jihong Liu from King Abdullah University of Science and Technology for providing the on-fault surface displacement data. The authors also thanks Dr. Suli Yao from the Chinese University of Hong Kong, Mathilde Marchandon from the Ludwig-Maximilians-Universität München, and Dr. Lingling Ye from Southern University of Science and Technology for the beneficial discussions. Tuncay Taymaz thanks to Dr. Beyza Taymaz for her phenomenal support during hectic days dealing with global media requests and organizing international scientific collaborations throughout 4-weeks of sleepless nights. This work is supported by the National Natural Science Foundation of China (Grant 42174057), Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology (2022B1212010002). Tuncay Taymaz thanks to Istanbul Technical University Research Fund (ITU-BAP-2023) and the Alexander von Humboldt Foundation for providing financial support toward relevant computational resources through the Humboldt-Stiftung follow-up program. This work is supported by Center for Computational Science and Engineering at Southern University of Science and Technology.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2023/8/3
Y1 - 2023/8/3
N2 - We considered various non-uniformities such as branch faults, rotation of stress field directions, and changes in tectonic environments to simulate the dynamic rupture process of the 6 February 2023 Mw 7.8 Kahramanmaraş earthquake in SE Türkiye. We utilized near-fault waveform data, GNSS static displacements, and surface rupture to constrain the dynamic model. The results indicate that the high initial stress accumulated in the Kahramanmaraş-Çelikhan seismic gap leads to the successful triggering of the East Anatolian Fault (EAF) and the supershear rupture in the northeast segment. Due to the complexity of fault geometry, the rupture speed along the southeastern segment of the EAF varied repeatedly between supershear and subshear, which contributed to the unexpectedly strong ground motion. Furthermore, the triggering of the EAF reminds us to be aware of the risk of seismic gaps on major faults being triggered by secondary faults, which is crucial to prevent significant disasters.
AB - We considered various non-uniformities such as branch faults, rotation of stress field directions, and changes in tectonic environments to simulate the dynamic rupture process of the 6 February 2023 Mw 7.8 Kahramanmaraş earthquake in SE Türkiye. We utilized near-fault waveform data, GNSS static displacements, and surface rupture to constrain the dynamic model. The results indicate that the high initial stress accumulated in the Kahramanmaraş-Çelikhan seismic gap leads to the successful triggering of the East Anatolian Fault (EAF) and the supershear rupture in the northeast segment. Due to the complexity of fault geometry, the rupture speed along the southeastern segment of the EAF varied repeatedly between supershear and subshear, which contributed to the unexpectedly strong ground motion. Furthermore, the triggering of the EAF reminds us to be aware of the risk of seismic gaps on major faults being triggered by secondary faults, which is crucial to prevent significant disasters.
UR - http://hdl.handle.net/10754/694140
UR - https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL104787
UR - http://www.scopus.com/inward/record.url?scp=85166738091&partnerID=8YFLogxK
U2 - 10.1029/2023gl104787
DO - 10.1029/2023gl104787
M3 - Article
SN - 0094-8276
VL - 50
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 15
ER -