【摘 要】
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The Mw6.4 earthquake on November 18, 2017 in Milin County, Nyingchi City, Tibet triggered thousands of landslides. By comparing visual interpretation of satellite images acquired shortly before and after the earthquake and field survey, we have created a
【机 构】
：
National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China
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The Mw6.4 earthquake on November 18, 2017 in Milin County, Nyingchi City, Tibet triggered thousands of landslides. By comparing visual interpretation of satellite images acquired shortly before and after the earthquake and field survey, we have created a new landslide database which includes 3130 coseis- mic landslides, each with an area of 0.01 to 4.35 km2. Six factors (elevation, slope angle, slope aspect, lithology, distance from the epicenter and distance from the seismogenic fault) were selected to correlate with the co- seismic landslides. In addition, the area and density of landslides were counted as indicators. Results show that most landslides occurred where the elevation is between 2000-3000 m, with a 40°-50° slope angle and S, E or SE slope aspect, schist or gneiss lithologies, 10-15 km from the epicenter, and 5 km within the seismo- genic fault. Most of the landslides, triggered by the Mw6.4 earthquake, are concentrated near the seismogenic fault rather than at the epicenter, indicating that the seismogenic structure is more influential than the loca- tion of the epicenter. Our findings may differ from other landslide database due to temporal image acquisition, interference from weather, and image resolution.
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