Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet
Abstract The 2023 Türkiye earthquake doublet, which includes two M W > 7.5 events, was the most devastating earthquake sequence globally over the past decade. Here we investigate the fault segmentations, rupture processes, radiated energy and stress releases of the doublet. Our findings reveal th...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Communications Earth & Environment |
| Online Access: | https://doi.org/10.1038/s43247-025-02004-x |
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| author | Jiangcheng Zhou Yueyi Xu Yong Zhang Wanpeng Feng Tuncay Taymaz Yun-Tai Chen Chenyu Xu Beibei Xu Rongjiang Wang Fuqiang Shi Zhigang Shao Qinghua Huang |
| author_facet | Jiangcheng Zhou Yueyi Xu Yong Zhang Wanpeng Feng Tuncay Taymaz Yun-Tai Chen Chenyu Xu Beibei Xu Rongjiang Wang Fuqiang Shi Zhigang Shao Qinghua Huang |
| author_sort | Jiangcheng Zhou |
| collection | DOAJ |
| description | Abstract The 2023 Türkiye earthquake doublet, which includes two M W > 7.5 events, was the most devastating earthquake sequence globally over the past decade. Here we investigate the fault segmentations, rupture processes, radiated energy and stress releases of the doublet. Our findings reveal that the first earthquake was overall a subshear event, with local supershear ruptures that may have been induced by geometric barriers, while the second event exhibited persistent supershear ruptures on its geometrically simple segments. The difference in radiation efficiency between the two events suggests that the first event may be an undershoot event and/or that the second event may be an overshoot event. We speculate that the geometric barriers of the first event hindered the stress release, leading to rupture of more small asperities and generation of high-frequency signals. In contrast, the simpler fault geometry of the second event facilitates a larger stress drop and a more complete stress release. |
| format | Article |
| id | doaj-art-1d30dd5734c6463d8c8d77340dd0f849 |
| institution | Kabale University |
| issn | 2662-4435 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Earth & Environment |
| spelling | doaj-art-1d30dd5734c6463d8c8d77340dd0f8492025-02-02T12:43:59ZengNature PortfolioCommunications Earth & Environment2662-44352025-01-016111210.1038/s43247-025-02004-xGeometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doubletJiangcheng Zhou0Yueyi Xu1Yong Zhang2Wanpeng Feng3Tuncay Taymaz4Yun-Tai Chen5Chenyu Xu6Beibei Xu7Rongjiang Wang8Fuqiang Shi9Zhigang Shao10Qinghua Huang11School of Earth and Space Sciences, Peking UniversityInstitute of Earthquake Forecasting, China Earthquake AdministrationSchool of Earth and Space Sciences, Peking UniversityGuangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-Sen UniversityDepartment of Geophysical Engineering, the Faculty of Mines, İstanbul Technical University, Maslak TR-34467, SarıyerSchool of Earth and Space Sciences, Peking UniversitySchool of Earth and Space Sciences, Peking UniversitySchool of Earth and Space Sciences, Peking UniversityGFZ Helmholtz Centre for GeosciencesShaanxi Earthquake AgencyInstitute of Earthquake Forecasting, China Earthquake AdministrationSchool of Earth and Space Sciences, Peking UniversityAbstract The 2023 Türkiye earthquake doublet, which includes two M W > 7.5 events, was the most devastating earthquake sequence globally over the past decade. Here we investigate the fault segmentations, rupture processes, radiated energy and stress releases of the doublet. Our findings reveal that the first earthquake was overall a subshear event, with local supershear ruptures that may have been induced by geometric barriers, while the second event exhibited persistent supershear ruptures on its geometrically simple segments. The difference in radiation efficiency between the two events suggests that the first event may be an undershoot event and/or that the second event may be an overshoot event. We speculate that the geometric barriers of the first event hindered the stress release, leading to rupture of more small asperities and generation of high-frequency signals. In contrast, the simpler fault geometry of the second event facilitates a larger stress drop and a more complete stress release.https://doi.org/10.1038/s43247-025-02004-x |
| spellingShingle | Jiangcheng Zhou Yueyi Xu Yong Zhang Wanpeng Feng Tuncay Taymaz Yun-Tai Chen Chenyu Xu Beibei Xu Rongjiang Wang Fuqiang Shi Zhigang Shao Qinghua Huang Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet Communications Earth & Environment |
| title | Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet |
| title_full | Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet |
| title_fullStr | Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet |
| title_full_unstemmed | Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet |
| title_short | Geometric barriers impacted rupture processes and stress releases of the 2023 Kahramanmaraş, Türkiye, earthquake doublet |
| title_sort | geometric barriers impacted rupture processes and stress releases of the 2023 kahramanmaras turkiye earthquake doublet |
| url | https://doi.org/10.1038/s43247-025-02004-x |
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