Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau
Abstract The detailed 3D fault model and further seismic rupture behavior analysis and fault mechanics simulation based on it are important and meaningful. A strong Mw 6.6 earthquake occurred in Luding, Sichuan, on 5 September 2022, the epicenter was located near the Y-shaped junction of the Xianshu...
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Nature Portfolio
2025-07-01
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| Online Access: | https://doi.org/10.1038/s41598-025-11553-2 |
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| author | Fang Xu Renqi Lu Jinyu Zhang Yann Klinger Yiduo Liu Xuhang Yang Guanshen Liu Wei Wang Zhaowu Guo |
| author_facet | Fang Xu Renqi Lu Jinyu Zhang Yann Klinger Yiduo Liu Xuhang Yang Guanshen Liu Wei Wang Zhaowu Guo |
| author_sort | Fang Xu |
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| description | Abstract The detailed 3D fault model and further seismic rupture behavior analysis and fault mechanics simulation based on it are important and meaningful. A strong Mw 6.6 earthquake occurred in Luding, Sichuan, on 5 September 2022, the epicenter was located near the Y-shaped junction of the Xianshuihe Fault Zone (XSHF), the Longmen Shan Fault Zone (LMSF), and the Anninghe Fault Zone (ANHF). To date, a detailed 3D fault model has not been established for this earthquake, preventing a 3D Coulomb stress change (ΔCFS) calculation for further seismic potential analysis. Therefore, first we build a detailed 3D fault model of the earthquake and then we compute ΔCFS in the surrounding areas. Based on 3D modeling technics, we establish a 3D model of the main faults using previously published relocated earthquake catalog and focal mechanism solutions; including the Moxi segment (f1) of the XSHF, the Daduhe fault (f2) and two previously unknown faults (f3 and f4). The 3D ΔCFS indicates that the strike-slip mainshock of the Luding earthquake significantly triggered two M > 5 dip-slip aftershocks. Moreover, it caused a remarkable increase in ΔCFS and hence a notable enhancement in seismic hazard in the northern ANHF. |
| format | Article |
| id | doaj-art-11c4cd78056f446a853c86aab8244e78 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-11c4cd78056f446a853c86aab8244e782025-08-20T03:45:53ZengNature PortfolioScientific Reports2045-23222025-07-0115111410.1038/s41598-025-11553-2Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateauFang Xu0Renqi Lu1Jinyu Zhang2Yann Klinger3Yiduo Liu4Xuhang Yang5Guanshen Liu6Wei Wang7Zhaowu Guo8State Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationState Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationState Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationUniversite Paris Cite, Institut Physique du Globe de Paris, CNRSKey Laboratory of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesState Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationState Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationState Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationState Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake AdministrationAbstract The detailed 3D fault model and further seismic rupture behavior analysis and fault mechanics simulation based on it are important and meaningful. A strong Mw 6.6 earthquake occurred in Luding, Sichuan, on 5 September 2022, the epicenter was located near the Y-shaped junction of the Xianshuihe Fault Zone (XSHF), the Longmen Shan Fault Zone (LMSF), and the Anninghe Fault Zone (ANHF). To date, a detailed 3D fault model has not been established for this earthquake, preventing a 3D Coulomb stress change (ΔCFS) calculation for further seismic potential analysis. Therefore, first we build a detailed 3D fault model of the earthquake and then we compute ΔCFS in the surrounding areas. Based on 3D modeling technics, we establish a 3D model of the main faults using previously published relocated earthquake catalog and focal mechanism solutions; including the Moxi segment (f1) of the XSHF, the Daduhe fault (f2) and two previously unknown faults (f3 and f4). The 3D ΔCFS indicates that the strike-slip mainshock of the Luding earthquake significantly triggered two M > 5 dip-slip aftershocks. Moreover, it caused a remarkable increase in ΔCFS and hence a notable enhancement in seismic hazard in the northern ANHF.https://doi.org/10.1038/s41598-025-11553-2Luding M w 6.6 earthquakeXianshuihe fault zoneSoutheastern Tibetan plateau3D fault modelCoulomb stress changeSeismic hazard analysis |
| spellingShingle | Fang Xu Renqi Lu Jinyu Zhang Yann Klinger Yiduo Liu Xuhang Yang Guanshen Liu Wei Wang Zhaowu Guo Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau Scientific Reports Luding M w 6.6 earthquake Xianshuihe fault zone Southeastern Tibetan plateau 3D fault model Coulomb stress change Seismic hazard analysis |
| title | Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau |
| title_full | Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau |
| title_fullStr | Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau |
| title_full_unstemmed | Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau |
| title_short | Detailed three-dimensional fault model of the 2022 M w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau |
| title_sort | detailed three dimensional fault model of the 2022 m w 6 6 luding earthquake reveals seismic hazard potential in the southeastern tibetan plateau |
| topic | Luding M w 6.6 earthquake Xianshuihe fault zone Southeastern Tibetan plateau 3D fault model Coulomb stress change Seismic hazard analysis |
| url | https://doi.org/10.1038/s41598-025-11553-2 |
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