A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008
Determining the main controlling factors of earthquake-triggered geohazards is a prerequisite for studying earthquake geohazards and post-disaster emergency response. By studying these factors, the geomorphic and geological factors controlling the nature, condition, and distribution of earthquake-in...
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KeAi Communications Co., Ltd.
2023-01-01
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| Series: | China Geology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2096519223008571 |
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| author | Chao Peng Zhi-qiang Yin Xu-jiao Zhang Hai Shao Ming-fei Pang |
| author_facet | Chao Peng Zhi-qiang Yin Xu-jiao Zhang Hai Shao Ming-fei Pang |
| author_sort | Chao Peng |
| collection | DOAJ |
| description | Determining the main controlling factors of earthquake-triggered geohazards is a prerequisite for studying earthquake geohazards and post-disaster emergency response. By studying these factors, the geomorphic and geological factors controlling the nature, condition, and distribution of earthquake-induced geohazards can be analyzed. Such insights facilitate earthquake disaster prediction and emergency response planning. The authors combined field investigations and spatial data analysis to examine geohazards induced by seismic events, examining ten earthquakes including the Wenchuan, Yushu, Lushan events, to elucidate the main control factors of seismic geohazard. The authors observed that seismic geohazard occurrence is usually affected by many factors, among which active nature of the seismogenic fault, seismic peak ground acceleration (PGA), topographic slope and geomorphic height differences, and distance from the fault zone and river system are the most important. Compared with strike-slip earthquakes, thrust earthquakes induce more high-altitude and high-speed remote landslides, which can cause great harm. Slopes of 0°–40° are prone to secondary seismic geohazards, which are mainly concentrated 0–6 km from the river system. Secondary geohazards are not only related to seismogenic fault but also influenced by the associated faults in the earthquake area. The maximum seismic PGA and secondary seismic geohazard number are positively correlated, and the horizontal and vertical ground motions play leading and promoting roles in secondary geohazard formation, respectively. Through the research, the spatial distribution of seismic geohazards is predicted, providing a basis for the formulation of emergency response plans following disasters.©2023 China Geology Editorial Office. |
| format | Article |
| id | doaj-art-4bbbfd39d1bd4a44afbb70e922713cba |
| institution | Kabale University |
| issn | 2589-9430 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | China Geology |
| spelling | doaj-art-4bbbfd39d1bd4a44afbb70e922713cba2025-08-20T03:32:58ZengKeAi Communications Co., Ltd.China Geology2589-94302023-01-0161708410.31035/cg2022009A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008Chao Peng0Zhi-qiang Yin1Xu-jiao Zhang2Hai Shao3Ming-fei Pang4China University of Geosciences (Beijing), Beijing 100029, China; First author: E-mail address: pengchao081@163.com (Chao Peng).China Institute of Geo-Environment Monitoring, China Geological Survey, Ministry of Natural Resources, Beijing 100081, China; Corresponding author: E-mail address: yinzhiqiang@mail.cgs.gov.cn (Zhi-qiang Yin).China University of Geosciences (Beijing), Beijing 100029, ChinaChina Institute of Geo-Environment Monitoring, China Geological Survey, Ministry of Natural Resources, Beijing 100081, ChinaChina Institute of Geo-Environment Monitoring, China Geological Survey, Ministry of Natural Resources, Beijing 100081, China; China University of Geosciences, Wuhan 430074, ChinaDetermining the main controlling factors of earthquake-triggered geohazards is a prerequisite for studying earthquake geohazards and post-disaster emergency response. By studying these factors, the geomorphic and geological factors controlling the nature, condition, and distribution of earthquake-induced geohazards can be analyzed. Such insights facilitate earthquake disaster prediction and emergency response planning. The authors combined field investigations and spatial data analysis to examine geohazards induced by seismic events, examining ten earthquakes including the Wenchuan, Yushu, Lushan events, to elucidate the main control factors of seismic geohazard. The authors observed that seismic geohazard occurrence is usually affected by many factors, among which active nature of the seismogenic fault, seismic peak ground acceleration (PGA), topographic slope and geomorphic height differences, and distance from the fault zone and river system are the most important. Compared with strike-slip earthquakes, thrust earthquakes induce more high-altitude and high-speed remote landslides, which can cause great harm. Slopes of 0°–40° are prone to secondary seismic geohazards, which are mainly concentrated 0–6 km from the river system. Secondary geohazards are not only related to seismogenic fault but also influenced by the associated faults in the earthquake area. The maximum seismic PGA and secondary seismic geohazard number are positively correlated, and the horizontal and vertical ground motions play leading and promoting roles in secondary geohazard formation, respectively. Through the research, the spatial distribution of seismic geohazards is predicted, providing a basis for the formulation of emergency response plans following disasters.©2023 China Geology Editorial Office.http://www.sciencedirect.com/science/article/pii/S2096519223008571Wenchuan earthquakeGeohazardsMain control factorsComparative studyGeological disater survey engineeringWestern China |
| spellingShingle | Chao Peng Zhi-qiang Yin Xu-jiao Zhang Hai Shao Ming-fei Pang A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008 China Geology Wenchuan earthquake Geohazards Main control factors Comparative study Geological disater survey engineering Western China |
| title | A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008 |
| title_full | A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008 |
| title_fullStr | A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008 |
| title_full_unstemmed | A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008 |
| title_short | A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008 |
| title_sort | comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in western china since the wenchuan earthquake in 2008 |
| topic | Wenchuan earthquake Geohazards Main control factors Comparative study Geological disater survey engineering Western China |
| url | http://www.sciencedirect.com/science/article/pii/S2096519223008571 |
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