Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China
On December 18, 2023, a magnitude MS6.2 earthquake struck Jishishan County, Gansu Province, triggering over 40 seismic subsidence sites within a seismic intensity VI zone, 32 km from the epicenter.The earthquake caused tens of millions in economic losses to mountain photovoltaic power stations. Exte...
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Taylor & Francis Group
2025-12-01
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| Series: | Geomatics, Natural Hazards & Risk |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/19475705.2025.2457997 |
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| author | Yali Wang Ping Wang Guofu Luo Shaofeng Chai Wenguo Ma Chenyang Ye Shiyang Xu Haoran Yu |
| author_facet | Yali Wang Ping Wang Guofu Luo Shaofeng Chai Wenguo Ma Chenyang Ye Shiyang Xu Haoran Yu |
| author_sort | Yali Wang |
| collection | DOAJ |
| description | On December 18, 2023, a magnitude MS6.2 earthquake struck Jishishan County, Gansu Province, triggering over 40 seismic subsidence sites within a seismic intensity VI zone, 32 km from the epicenter.The earthquake caused tens of millions in economic losses to mountain photovoltaic power stations. Extensive geological surveys and comparisons with similar landslides (such as soil loosening, widespread cracks, and stepped displacements) triggered by the 1920 Haiyuan MS8.5 earthquake and the 1995 Yongdeng MS5.8 earthquake, this study preliminarily identifies one subsidence sites as a seismic-collapsed loess landslide. To investigate its disaster-causing mechanism: the dynamic triaxial test was conducted to assess the seismic subsidence potential of the loess at the site, and the maximum subsidence amount under different seismic loads were calculated by combining actual data from nearby bedrock stations with site amplification data from the active source; simulation of the destabilization evolution of seismic-collapsed loess landslides by large-scale shaking table tests; and a three-dimensional slope model was developed using finite element method to study the complex seismic conditions responsible for site damage. The research findings provide a theoretical foundation for further investigations into the disaster mechanisms of seismic-collapsed loess landslides. |
| format | Article |
| id | doaj-art-eedf8d4e220546869aca59514bc416df |
| institution | Kabale University |
| issn | 1947-5705 1947-5713 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
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| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj-art-eedf8d4e220546869aca59514bc416df2025-01-31T14:15:08ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132025-12-0116110.1080/19475705.2025.2457997Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, ChinaYali Wang0Ping Wang1Guofu Luo2Shaofeng Chai3Wenguo Ma4Chenyang Ye5Shiyang Xu6Haoran Yu7Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou, ChinaLanzhou Institute of Seismology, China Earthquake Administration, Lanzhou, ChinaEarthquake Administration of Ningxia Hui Autonomous Region, Yinchuan, ChinaLanzhou Institute of Seismology, China Earthquake Administration, Lanzhou, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, ChinaGansu Traffic Engineering Construction Supervision Co, LTD, Lanzhou, ChinaLanzhou Institute of Seismology, China Earthquake Administration, Lanzhou, ChinaLanzhou Institute of Seismology, China Earthquake Administration, Lanzhou, ChinaOn December 18, 2023, a magnitude MS6.2 earthquake struck Jishishan County, Gansu Province, triggering over 40 seismic subsidence sites within a seismic intensity VI zone, 32 km from the epicenter.The earthquake caused tens of millions in economic losses to mountain photovoltaic power stations. Extensive geological surveys and comparisons with similar landslides (such as soil loosening, widespread cracks, and stepped displacements) triggered by the 1920 Haiyuan MS8.5 earthquake and the 1995 Yongdeng MS5.8 earthquake, this study preliminarily identifies one subsidence sites as a seismic-collapsed loess landslide. To investigate its disaster-causing mechanism: the dynamic triaxial test was conducted to assess the seismic subsidence potential of the loess at the site, and the maximum subsidence amount under different seismic loads were calculated by combining actual data from nearby bedrock stations with site amplification data from the active source; simulation of the destabilization evolution of seismic-collapsed loess landslides by large-scale shaking table tests; and a three-dimensional slope model was developed using finite element method to study the complex seismic conditions responsible for site damage. The research findings provide a theoretical foundation for further investigations into the disaster mechanisms of seismic-collapsed loess landslides.https://www.tandfonline.com/doi/10.1080/19475705.2025.2457997Loess seismic subsidenceseismic-collapsed loess landslidesactive sourcedynamic responsemechanism |
| spellingShingle | Yali Wang Ping Wang Guofu Luo Shaofeng Chai Wenguo Ma Chenyang Ye Shiyang Xu Haoran Yu Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China Geomatics, Natural Hazards & Risk Loess seismic subsidence seismic-collapsed loess landslides active source dynamic response mechanism |
| title | Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China |
| title_full | Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China |
| title_fullStr | Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China |
| title_full_unstemmed | Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China |
| title_short | Mechanism of seismic-collapsed loess landslides induced by the Ms6.2 earthquake in Jishishan County, Gansu Province, China |
| title_sort | mechanism of seismic collapsed loess landslides induced by the ms6 2 earthquake in jishishan county gansu province china |
| topic | Loess seismic subsidence seismic-collapsed loess landslides active source dynamic response mechanism |
| url | https://www.tandfonline.com/doi/10.1080/19475705.2025.2457997 |
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