HUANG Yuandong, XU Chong. 2019: ANALYSIS OF THE DISTRIBUTION LAW OF LANDSLIDES TRIGGERED BY THE XINGWEN MS5.7 EARTHQUAKE IN 2018. JOURNAL OF ENGINEERING GEOLOGY, 27(s1): 185-192. DOI: 10.13544/j.cnki.jeg.2019061
    Citation: HUANG Yuandong, XU Chong. 2019: ANALYSIS OF THE DISTRIBUTION LAW OF LANDSLIDES TRIGGERED BY THE XINGWEN MS5.7 EARTHQUAKE IN 2018. JOURNAL OF ENGINEERING GEOLOGY, 27(s1): 185-192. DOI: 10.13544/j.cnki.jeg.2019061

    ANALYSIS OF THE DISTRIBUTION LAW OF LANDSLIDES TRIGGERED BY THE XINGWEN MS5.7 EARTHQUAKE IN 2018

    • On December 16, 2018, at 12:46 am, a magnitude MS5.7 earthquake occurred in Xingwen County, Sichuan Province. The quake triggered a lot of landslides. Based on remote sensing images before and after the earthquake and the GIS platform, this study produced a distribution map of the earthquake-triggered landslide in the Ⅵ-Ⅶ intensity area by visual interpretation method, and analyzed the relationship between these landslides and several environmental factors such as elevation, slope, slope aspect, and slope curvature. The results show that at least 288 landslides were triggered by the earthquake, with a total area of 0.49 km2 and an average area of 1701 m2. Most of these landslides were small scale, while the largest reaching 51, 745 m2 and the smallest 111 m2. Most of the landslide developed in the areas of 700~1000 m in elevation, 5°~15°of slope angle, slope aspect between 180ånd 240°, 10 km range from the epicenter, and underlying of conglomerate, limestone and shale rock. This study provides a basis for further study on the spatial distribution, mechanism, risk assessment and prediction of seismic landslides.
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