Abstract: The types of coseismic landslides in different geomorphological environments have great differences. Confirming their types is of great significance for understanding the characteristics of disasters. Using multitemporal highspatial resolution satellite and aerial images, combined with comprehensive remote sensing interpretation and field investigation methods, retrospectively study the temporal and spatial distribution characteristics of landslides triggered by the typical moderate to strong earthquake in western China, and have a good understanding of the occurrence and evolution characteristics of coseismic secondary disasters. This paper focused on the case of “moderate size earthquake with severe catastrophe” of the August 3^rd, 2014 Ludian M_S6.5 earthquake in Yunnan Province which triggering coseismic landslides. The research shows that ① The number of triggeredlandslides database is 6 209, with a total area of 9.72 km², of which 10 landslides have areas of great than 70 000 m² caused major disasters, such as Niulanjiang River dammed lakes and blocking lifelines; ② Most of the extracted triggered landslides are belong to bedrock collapses, with small provenance areas, narrow and long circulation areas, and accumulation areas in the form of piles of rocks at the foot of the slope, which have the characteristics of relative bigger affected area but smaller volumes; ③ The coseismic landslides triggered by the LudianM_S6.5 earthquake are consistent with the characteristics of the database of coseismic landslides in mountains and valleys triggered by other strong earthquakes in western China.

Key words: The 2014 Ludian M_S6.5 earthquake, Earthquake-triggered landslide, Niulanjiang River, Remote sensing interpretation, Anatomical earthquake case