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On June 10, 2022, an earthquake swarm including three major earthquakes with magnitudes of Ms5.8, Ms6.0, and Ms5.2 occurred in Maerkang, Sichuan, China. According to statistics, at least 650 landslides have been triggered by this earthquake, with a total area of 1.2 km2. In this study, the spatial distribution of these landslides and their correlation with seismic, topographic, and geological factors were analyzed based on the coseismic landslide inventory. The results show that landslides are mainly distributed on the northeast side of the Songgang-Fubianhe fault (SG-FBHF), which is a VII intensity area. The closer to the epicenter, the more concentrated the landslide distribution. The landslide density increases significantly with increasing slope. The strata of the Upper Triassic Zhuwo Formation are more prone to coseismic landslide occurrence. Our results, when combined with the focal mechanism solution, precise location of aftershocks, and geological characteristics of the SG-FBHF, suggest that this earthquake is a left-lateral strike-slip earthquake along the SG-FBHF, and the seismogenic fault is slightly tilted to the northeast. In addition, nearly 70% of coseismic landslides are concentrated in the extreme seismic area of ~ 225km2, indicating that the seismic energy release is highly concentrated. This work analyzed the distribution of landslides triggered by a moderately strong earthquake swarm, providing a typical case for researchers to understand the spatial distribution pattern of earthquake-triggered landslides and a scientific support for disaster prevention of coseismic landslides in southwestern Sichuan, China. [ABSTRACT FROM AUTHOR]

The June 10, 2022 Ms5.8, Ms6.0 and Ms5.2 earthquake swarm of Maerkang, Sichuan, China has triggered a lot of landslides. The primary purpose of this paper is to prepare a detailed coseismic landslides inventory and ancient landslide inventory in the earthquake swarm-affected area. Based on pre- and post-quake high-resolution optical satellite images (planet), we delineated 650 individual coseismic landslides in the VI-intensity area and above, occupying an area of about 1.2 ​km2. The largest landslide covers about 70217 ​m2 in horizontal projection, while the smallest one is just 81 ​m2. In addition, based on the series of high-precise images on the Google Earth Platform, 759 ancient landslides were also delineated with an area of 117 ​km2. The maximum area reaches about 2 ​km2 and the minimum is 2580 ​m2. The two inventories provide a basis for landslide spatial distribution and hazard assessment, disaster prevention and mitigation of earthquake-triggered landslides in similar regions. We opened these two landslide inventories to facilitate researchers to carry out more in-depth work.