Abstract
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.
| Original language | English |
|---|---|
| Article number | e2023GL104787 |
| Journal | Geophysical Research Letters |
| Volume | 50 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 16 Aug 2023 |
Bibliographical note
Publisher Copyright:© 2023. The Authors.
Funding
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. 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.
| Funders | Funder number |
|---|---|
| Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology | |
| Guangdong Provincial Key Laboratory of Geophysical High‐resolution Imaging Technology | 2022B1212010002 |
| Alexander von Humboldt-Stiftung | |
| National Natural Science Foundation of China | 42174057 |
| King Abdullah University of Science and Technology | |
| Chinese University of Hong Kong | |
| Istanbul Teknik Üniversitesi | ITU‐BAP‐2023 |
| Southern University of Science and Technology |
Keywords
- 2023 Mw 7.8 Kahramanmaraş earthquake
- earthquake rupture dynamics
- transient supershear rupture
