Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake
On 8 January 2022, a seismic event of significant magnitude (Mw 6.7, Ms 6.9) occurred in the northeastern region of the Tibetan Plateau. This earthquake was characterized by left-lateral strike-slip motion, accompanied by a minor reverse movement. The Menyuan earthquake resulted in the formation of...
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MDPI AG
2023-09-01
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| Online Access: | https://www.mdpi.com/2072-4292/15/18/4375 |
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| author | Yameng Wen Daoyang Yuan Hong Xie Ruihuan Su Qi Su Zhimin Li Hao Sun Guojun Si Jinchao Yu Yanwen Chen Hongqiang Li Lijun Zhang |
| author_facet | Yameng Wen Daoyang Yuan Hong Xie Ruihuan Su Qi Su Zhimin Li Hao Sun Guojun Si Jinchao Yu Yanwen Chen Hongqiang Li Lijun Zhang |
| author_sort | Yameng Wen |
| collection | DOAJ |
| description | On 8 January 2022, a seismic event of significant magnitude (Mw 6.7, Ms 6.9) occurred in the northeastern region of the Tibetan Plateau. This earthquake was characterized by left-lateral strike-slip motion, accompanied by a minor reverse movement. The Menyuan earthquake resulted in the formation of two main ruptures and one secondary rupture. These ruptures were marked by a left-lateral step zone that extended over a distance of 1 km between the main ruptures. The length of the rupture zones was approximately 37 km. The surface rupture zone exhibited various features, including left-lateral offset small gullies, riverbeds, wire fences, road subgrades, mole tracks, cracks, and scarps. Through a comprehensive field investigation and precise measurement using unmanned aerial vehicle (UAV) imagery, 111 coseismic horizontal offsets were determined, with the maximum offset recorded at 2.6 ± 0.3 m. The analysis of aftershocks and the findings from the field investigation led to the conclusion that the earthquake was triggered by the Lenglongling fault and the Tuolaishan fault. These faults intersected at a release double-curved structure, commonly referred to as a stepover. During this particular process, the Lenglongling fault was responsible for initiating the coseismic rupture of the Sunan–Qilian fault. It is important to note that the stress applied to the Tuolaishan fault has not been fully relieved, indicating the presence of potential future hazards. |
| first_indexed | 2024-03-10T22:06:36Z |
| format | Article |
| id | doaj.art-a73220d160bb4ceaa28391c012a28398 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T22:06:36Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-a73220d160bb4ceaa28391c012a283982023-11-19T12:46:49ZengMDPI AGRemote Sensing2072-42922023-09-011518437510.3390/rs15184375Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 EarthquakeYameng Wen0Daoyang Yuan1Hong Xie2Ruihuan Su3Qi Su4Zhimin Li5Hao Sun6Guojun Si7Jinchao Yu8Yanwen Chen9Hongqiang Li10Lijun Zhang11Key Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaLanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaDepartment of Geographic Science, Faculty of Arts and Sciences, Beijing Normal University, Zhuhai 519000, ChinaQinghai Earthquake Agency, Xining 810001, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Mineral Resources in Western China (Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, ChinaOn 8 January 2022, a seismic event of significant magnitude (Mw 6.7, Ms 6.9) occurred in the northeastern region of the Tibetan Plateau. This earthquake was characterized by left-lateral strike-slip motion, accompanied by a minor reverse movement. The Menyuan earthquake resulted in the formation of two main ruptures and one secondary rupture. These ruptures were marked by a left-lateral step zone that extended over a distance of 1 km between the main ruptures. The length of the rupture zones was approximately 37 km. The surface rupture zone exhibited various features, including left-lateral offset small gullies, riverbeds, wire fences, road subgrades, mole tracks, cracks, and scarps. Through a comprehensive field investigation and precise measurement using unmanned aerial vehicle (UAV) imagery, 111 coseismic horizontal offsets were determined, with the maximum offset recorded at 2.6 ± 0.3 m. The analysis of aftershocks and the findings from the field investigation led to the conclusion that the earthquake was triggered by the Lenglongling fault and the Tuolaishan fault. These faults intersected at a release double-curved structure, commonly referred to as a stepover. During this particular process, the Lenglongling fault was responsible for initiating the coseismic rupture of the Sunan–Qilian fault. It is important to note that the stress applied to the Tuolaishan fault has not been fully relieved, indicating the presence of potential future hazards.https://www.mdpi.com/2072-4292/15/18/4375Menyuan earthquakesurface ruptureseismic mechanismrelease double-curved structure |
| spellingShingle | Yameng Wen Daoyang Yuan Hong Xie Ruihuan Su Qi Su Zhimin Li Hao Sun Guojun Si Jinchao Yu Yanwen Chen Hongqiang Li Lijun Zhang Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake Remote Sensing Menyuan earthquake surface rupture seismic mechanism release double-curved structure |
| title | Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake |
| title_full | Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake |
| title_fullStr | Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake |
| title_full_unstemmed | Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake |
| title_short | Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake |
| title_sort | typical fine structure and seismogenic mechanism analysis of the surface rupture of the 2022 menyuan mw 6 7 earthquake |
| topic | Menyuan earthquake surface rupture seismic mechanism release double-curved structure |
| url | https://www.mdpi.com/2072-4292/15/18/4375 |
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