Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet
Abstract The February 2023 Turkey‐Syria Earthquake doublet ruptured multiple segments of the East Anatolian Fault (EAF) Zone. Dominating seismicity focal mechanism shifted dramatically from strike‐slip to normal‐faulting after the doublet. To better understand this shift, here we derived a comprehen...
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| Format: | Article |
| Language: | English |
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Wiley
2024-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL107788 |
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| author | Zhangfeng Ma Chenglong Li Yu Jiang Yukuan Chen Xinzhong Yin Yosuke Aoki Sang‐Ho Yun Shengji Wei |
| author_facet | Zhangfeng Ma Chenglong Li Yu Jiang Yukuan Chen Xinzhong Yin Yosuke Aoki Sang‐Ho Yun Shengji Wei |
| author_sort | Zhangfeng Ma |
| collection | DOAJ |
| description | Abstract The February 2023 Turkey‐Syria Earthquake doublet ruptured multiple segments of the East Anatolian Fault (EAF) Zone. Dominating seismicity focal mechanism shifted dramatically from strike‐slip to normal‐faulting after the doublet. To better understand this shift, here we derived a comprehensive 3D co‐seismic displacement field and performed the stress analysis. Abundant space geodetic data were used to generate high‐resolution 3D surface displacement, which provide tight constraints on fault geometry, slip distribution and stress field. Together with stress inversion from aftershock focal mechanisms, we show that the principal stress direction rotation in the region with the most normal‐faulting aftershocks is the staggering 29°. The induced heterogenous stress may explain the shift of the dominant focal mechanism toward normal faulting. We suggest that the extensional horsetail splay faults, likely formed through geologic time scale related to the releasing bend on the EAF, are the hosts of most of the normal faulting aftershocks. |
| format | Article |
| id | doaj-art-d0ecc9740dbe41e78364e7d8ad0f730d |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d0ecc9740dbe41e78364e7d8ad0f730d2025-08-20T03:10:25ZengWileyGeophysical Research Letters0094-82761944-80072024-03-01516n/an/a10.1029/2023GL107788Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake DoubletZhangfeng Ma0Chenglong Li1Yu Jiang2Yukuan Chen3Xinzhong Yin4Yosuke Aoki5Sang‐Ho Yun6Shengji Wei7Earth Observatory of Singapore Singapore SingaporeEarth Observatory of Singapore Singapore SingaporeEarth Observatory of Singapore Singapore SingaporeEarth Observatory of Singapore Singapore SingaporeEarth Observatory of Singapore Singapore SingaporeEarthquake Research Institute The University of Tokyo Tokyo JapanEarth Observatory of Singapore Singapore SingaporeEarth Observatory of Singapore Singapore SingaporeAbstract The February 2023 Turkey‐Syria Earthquake doublet ruptured multiple segments of the East Anatolian Fault (EAF) Zone. Dominating seismicity focal mechanism shifted dramatically from strike‐slip to normal‐faulting after the doublet. To better understand this shift, here we derived a comprehensive 3D co‐seismic displacement field and performed the stress analysis. Abundant space geodetic data were used to generate high‐resolution 3D surface displacement, which provide tight constraints on fault geometry, slip distribution and stress field. Together with stress inversion from aftershock focal mechanisms, we show that the principal stress direction rotation in the region with the most normal‐faulting aftershocks is the staggering 29°. The induced heterogenous stress may explain the shift of the dominant focal mechanism toward normal faulting. We suggest that the extensional horsetail splay faults, likely formed through geologic time scale related to the releasing bend on the EAF, are the hosts of most of the normal faulting aftershocks.https://doi.org/10.1029/2023GL107788InSARearthquakestress rotationsplay faultcoseismic slip |
| spellingShingle | Zhangfeng Ma Chenglong Li Yu Jiang Yukuan Chen Xinzhong Yin Yosuke Aoki Sang‐Ho Yun Shengji Wei Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet Geophysical Research Letters InSAR earthquake stress rotation splay fault coseismic slip |
| title | Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet |
| title_full | Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet |
| title_fullStr | Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet |
| title_full_unstemmed | Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet |
| title_short | Space Geodetic Insights to the Dramatic Stress Rotation Induced by the February 2023 Turkey‐Syria Earthquake Doublet |
| title_sort | space geodetic insights to the dramatic stress rotation induced by the february 2023 turkey syria earthquake doublet |
| topic | InSAR earthquake stress rotation splay fault coseismic slip |
| url | https://doi.org/10.1029/2023GL107788 |
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