Abstract:
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 km
2 and an average area of 1701 m
2. Most of these landslides were small scale, while the largest reaching 51, 745 m
2 and the smallest 111 m
2. 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.