Articles | Volume 25, issue 2
https://doi.org/10.5194/nhess-25-857-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-25-857-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Modeling seismic hazard and landslide occurrence probabilities in northwestern Yunnan, China: exploring complex fault systems with multi-segment rupturing in a block rotational tectonic zone
Jia Cheng
CORRESPONDING AUTHOR
School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing, 100083, China
National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, 100085, China
Xiwei Xu
School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing, 100083, China
Shimin Zhang
National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, 100085, China
Pengyu Zhu
National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, 100085, China
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This study presents a national-scale database (1:4000 000) of active faults in China and its adjacent regions in tandem with an associated web-based query system. This database integrates regional-scale studies and surveys conducted over the past 2 decades (at reference scales from 1:250 000 to 1:50 000). Our system hosts this nation-scale database accessible through a Web Geographic Information System (GIS) application.
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Scientific understandings of the distribution of coseismic landslides, followed by emergency and medium- and long-term risk assessment, can reduce landslide risk. The aim of this study is to propose an improved three-stage spatial prediction strategy and develop corresponding hazard assessment software called Mat.LShazard V1.0, which provides a new application tool for coseismic landslide disaster prevention and mitigation in different stages.
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Short summary
The northwestern Yunnan region (NWYR), with a complex network of active faults, presents significant seismic hazards such as multi-segment ruptures and landslides. This article introduces a new seismic hazard model which integrates fault slip parameters to assess the risks associated with multi-segment ruptures. The results reveal the intricate relationship between these ruptures and the regional small block rotation induced by regional low-crustal flow and gravitational collapse.
The northwestern Yunnan region (NWYR), with a complex network of active faults, presents...
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