Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet

Chunmei Ren; Zexin Wang; Tuncay Taymaz; Nan Hu; Heng Luo; Zeyan Zhao; Han Yue; Xiaodong Song; Zhengkang Shen; Haoyu Xu; Jianghui Geng; Wei Zhang; Teng Wang; Zengxi Ge; T. Serkan Irmak; Ceyhun Erman; Yijian Zhou; Zhen Li; Hang Xu; Bonan Cao; Hongyang Ding

doi:10.1126/science.adi1519

Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet

Chunmei Ren, Zexin Wang, Tuncay Taymaz, Nan Hu, Heng Luo, Zeyan Zhao, Han Yue^*, Xiaodong Song^*, Zhengkang Shen, Haoyu Xu, Jianghui Geng, Wei Zhang, Teng Wang, Zengxi Ge, T. Serkan Irmak, Ceyhun Erman, Yijian Zhou, Zhen Li, Hang Xu, Bonan CaoHongyang Ding

^*Corresponding author for this work

Department of Geophysical Engineering

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

On 6 February 2023, two large earthquakes (moment magnitude 7.8 and 7.6) shocked a vast area of southeastern Türkiye and northern Syria, leading to heavy casualties and economic loss. To investigate the rupture process over multiple fault segments, we performed a comprehensive analysis of local seismic and geodetic data and determined supershear ruptures on the initial branch and the Pazarcık and Erkenek segments and subshear ruptures on the Amanos segment of event 1. The bilateral rupture of event 2 also presents distinct sub- and supershear velocities. The dynamic stress of the branch fault rupture triggered the Pazarcık segment initial rupture at a point 9 kilometers west of the junction of these two faults, boosting the supershear rupture of the Pazarcık segment of the main fault. The geometry and prestress level of multiple segments controlled the rupture behaviors and influenced the ground shaking intensity.

Original language	English
Pages (from-to)	305-311
Number of pages	7
Journal	Science
Volume	383
Issue number	6680
DOIs	https://doi.org/10.1126/science.adi1519
Publication status	Published - 1 Jan 2024

Bibliographical note

Publisher Copyright:
Copyright © 2024 the authors, some rights reserved.

Funding

We thank three anonymous reviewers for their constructive comments, which helped improve the article. This project was supported by the National Key R&D Program of China (grant 2022YFF0800602) and the National Science Foundation of China (grants 42025401, U1901602, and 42174059). T.T. acknowledges the Istanbul Technical University-Research Fund (ITU-BAP) and the Alexander von Humboldt Foundation Research Fellowship Award for providing computing facilities and other relevant resources through Humboldt-Stiftung Follow-Up Program. The Peking University research group acknowledges the China National Petroleum Corporation–Peking University Strategic Cooperation Project of Fundamental Research.

Funders	Funder number
Istanbul Technical University-Research Fund
Alexander von Humboldt-Stiftung
National Natural Science Foundation of China	42174059, 42025401, U1901602
China National Petroleum Corporation
Peking University
National Key Research and Development Program of China	2022YFF0800602
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi

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Ren, C., Wang, Z., Taymaz, T., Hu, N., Luo, H., Zhao, Z., Yue, H., Song, X., Shen, Z., Xu, H., Geng, J., Zhang, W., Wang, T., Ge, Z., Irmak, T. S., Erman, C., Zhou, Y., Li, Z., Xu, H., ... Ding, H. (2024). Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet. Science, 383(6680), 305-311. https://doi.org/10.1126/science.adi1519

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abstract = "On 6 February 2023, two large earthquakes (moment magnitude 7.8 and 7.6) shocked a vast area of southeastern T{\"u}rkiye and northern Syria, leading to heavy casualties and economic loss. To investigate the rupture process over multiple fault segments, we performed a comprehensive analysis of local seismic and geodetic data and determined supershear ruptures on the initial branch and the Pazarcık and Erkenek segments and subshear ruptures on the Amanos segment of event 1. The bilateral rupture of event 2 also presents distinct sub- and supershear velocities. The dynamic stress of the branch fault rupture triggered the Pazarcık segment initial rupture at a point 9 kilometers west of the junction of these two faults, boosting the supershear rupture of the Pazarcık segment of the main fault. The geometry and prestress level of multiple segments controlled the rupture behaviors and influenced the ground shaking intensity.",

author = "Chunmei Ren and Zexin Wang and Tuncay Taymaz and Nan Hu and Heng Luo and Zeyan Zhao and Han Yue and Xiaodong Song and Zhengkang Shen and Haoyu Xu and Jianghui Geng and Wei Zhang and Teng Wang and Zengxi Ge and Irmak, {T. Serkan} and Ceyhun Erman and Yijian Zhou and Zhen Li and Hang Xu and Bonan Cao and Hongyang Ding",

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doi = "10.1126/science.adi1519",

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Ren, C, Wang, Z, Taymaz, T, Hu, N, Luo, H, Zhao, Z, Yue, H, Song, X, Shen, Z, Xu, H, Geng, J, Zhang, W, Wang, T, Ge, Z, Irmak, TS, Erman, C, Zhou, Y, Li, Z, Xu, H, Cao, B & Ding, H 2024, 'Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet', Science, vol. 383, no. 6680, pp. 305-311. https://doi.org/10.1126/science.adi1519

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AU - Ren, Chunmei

AU - Wang, Zexin

AU - Taymaz, Tuncay

AU - Hu, Nan

AU - Luo, Heng

AU - Zhao, Zeyan

AU - Yue, Han

AU - Song, Xiaodong

AU - Shen, Zhengkang

AU - Xu, Haoyu

AU - Geng, Jianghui

AU - Zhang, Wei

AU - Wang, Teng

AU - Ge, Zengxi

AU - Irmak, T. Serkan

AU - Erman, Ceyhun

AU - Zhou, Yijian

AU - Li, Zhen

AU - Xu, Hang

AU - Cao, Bonan

AU - Ding, Hongyang

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AB - On 6 February 2023, two large earthquakes (moment magnitude 7.8 and 7.6) shocked a vast area of southeastern Türkiye and northern Syria, leading to heavy casualties and economic loss. To investigate the rupture process over multiple fault segments, we performed a comprehensive analysis of local seismic and geodetic data and determined supershear ruptures on the initial branch and the Pazarcık and Erkenek segments and subshear ruptures on the Amanos segment of event 1. The bilateral rupture of event 2 also presents distinct sub- and supershear velocities. The dynamic stress of the branch fault rupture triggered the Pazarcık segment initial rupture at a point 9 kilometers west of the junction of these two faults, boosting the supershear rupture of the Pazarcık segment of the main fault. The geometry and prestress level of multiple segments controlled the rupture behaviors and influenced the ground shaking intensity.

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Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet

Abstract

Bibliographical note

Funding

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