Factors Controlling the Spatial Distribution of Coseismic Landslides Triggered by Ludian Earthquake
DOI:
https://doi.org/10.64862/ajeg.2025.2sp.140.297Keywords:
Coseismic landslides, Ludian earthquake, Spatial distribution, Controlling factors, GIS analysis, Slope gradient, Fault proximity, Landslide susceptibilityAbstract
The spatial distribution of coseismic landslides is critical for understanding earthquake-induced hazards and future disaster mitigation. This study investigates the controlling factors of landslides triggered by the Mw 6.1 Ludian earthquake that occurred on 3 August 2014 in Yunnan Province, China. A total of 1,414 landslides were identified within an area of 704.7 km² through image interpretation and field investigation. Geographic Information System (GIS)-based spatial analysis was used to evaluate the relationship between landslide occurrence and controlling factors. The results indicate that slope gradient and distance from the coseismic fault are the dominant factors influencing landslide distribution. Fault movement direction, lithological conditions, and human-induced slope cutting also contributed significantly by increasing rock mass fracturing and slope instability during seismic shaking.
References
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Zou, Y., Qi, S.W., Guo, S.F., Zheng, B., Zhan, Z., He, N., Huang, X., Hou, X., and Liu, H. (2022). Factors controlling the spatial distribution of coseismic landslides triggered by the Mw 6.1 Ludian earthquake in China. Engineering Geology 296, 106477. https://doi.org/10.1016/j.enggeo.2021.106477
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