Spatial Pattern and Intensity Mapping of Coseismic Landslides Triggered by the 2022 Luding Earthquake in China

On 5 September 2022, an Mw 6.6 earthquake occurred in Luding County China, resulting extensive surface rupture and casualties. Sufficient study on distribution characteristics susceptibility regionalization of the earthquake-induced disasters (especially coseismic landslides) region has great significance to mitigation seismic hazards. In this study, a complete landslide inventory, including 6233 landslides with 32.4 km2 area, was present through multi-temporal satellite images. We explored controlling conditions induced by 2022 event from perspective epicentral distance. According maximum value area density, geographical location strongest activity intensity under influence energy, macro-epicenter, determined, we found remarkable relationship macro-epicentral distance, that is, both number density associatively decreased increase Then, fast effective method for zoning based obvious attenuation proposed, which could provide theoretical reference mapping earthquakes mountainous areas. Additionally, quantitatively assess impact topographic, seismogenic lithological factors spatial pattern landslides, relationships between occurrences influencing factors, i.e., elevation, slope angle, local relief, aspect, distance fault lithology, were examined. This provides fresh important guiding post-earthquake reconstruction land use disaster area.