On July 22,2013 at 07：45 （Beijing time）,an earthquake of MS6.6 occurred at the boundary between Minxian County and Zhangxian County in the mountain area of Western Qinling,southern Gansu Province.A strong aftershock of MS5.6 occurred at 34.6°N,104.2°E at a focal depth of 14 km.As of 13：00 24 July,the earthquake had affected 780 100 000 people in 491 towns of 33 counties in 6 cities （prefectures）：Dingxi,Longnan,Tianshui,Baiyin,Linxia,and Gannan.The earthquake caused 95 deaths and 1 366 injuries.The earthquake triggered many landslides for several reasons,including that the earthquake-struck area in the western Qinling area of southern Gansu Province was covered by loose thick loess and has steep topography,and there was strong rainfall before the earthquake.Strong aftershocks caused more landslides to occur.The landslides triggered by the Lushan earthquake were of various types,such as falls,slides,and topples on loess scarp,soil deepseated landslides,large soil avalanches,and slope cracks.From visual interpretation of post-earthquake remote sensing images and selected field checks,at least 2 330 landslides were triggered by this earthquake,and these landslides occurred in a rectangular area of about 330 km2.Based on the geographic information system （GIS）,we analyzed six topographic,geological,and seismic parameters：elevation,slope angle,slope aspect,slope curvature,formation lithology,and PGA.The elevation of the study area ranges from 2 207 m to 3 340 m.The study area was divided into 11 classes based on 200 m intervals for landslide statistics.The slope angles in the study area range from 0° to 64.6°,and were divided into nine classes：0°～5°,5°～10°,10°～15°,15°～20°,20°～25°,25°～30°,30° ～35°,35°～40°,and 40°～64.6°.The slope aspect was divided into nine classes：flat,north,northeast,east,southeast,south,southwest,west,and northwest.Based on the slope curvature value,the study area was divided into six classes,and the ranges of the slope curvature value were ＜-1,-1 to-0.1,-0.1 to 0,0 to 0.1,0.1 to 1,and ＞1.The six categories of strata in the study area are：（1） Q4,Qcxh,Q3;（2） Nb; （3） Eb; （4） P11-c; （5） P11-b,P11-a,（6） D3dc,and （7） D22-e.The PGA values for the study area were divided into eight classes：0.34 g,0.32 g,0.28 g,0.24 g,0.2 g,0.16 g,0.12 g,and 0.08 g.Analysis of the topographic parameters showed that the Minxian-Zhangxian earthquake-triggered landslides mostly occurred in areas with these characteristics：an elevation between 2 400 m and 2 600 m,a slope angle between 10° and 20°,a W or NW slope aspect,and a slope curvature between-1and0.1.The Paleogene sandstones and conglomerates （Eb） suffered more landslides.The statistics of the peak ground acceleration （PGA） showed that 0.16 g is the PGA for most of the earthquake-triggered landslides.This paper can show which topographic,geological,and earthquake factors were linked with landslide occurrence.The point-based inventory of landslides triggered by the Minxian-Zhangxian earthquake can provide basic data for subsequent studies of earthquake-triggered landslides,such as spatial distribution analysis,hazard assessment,and mitigation of landslides and debris flows in earthquake-struck areas.