The　Ms　8.0　Wenchuan　earthquake　of　May　12,　2008　is　one　of　the　most　disastrous　earthquakes　in　China.　The　earthquake　triggered　tens　of　thousands　of　landslides　over　a　broad　area,　including　shallow,　disrupted　landslides,　rock　falls,　deep-seated　landslides,　and　rock　avalanches,　some　of　which　buried　large　sections　of　some　towns　and　dammed　the　rivers.　The　purpose　of　this　study　is　to　investigate　correlations　between　the　occurrence　of　landslides　with　geologic　and　geomorphologic　conditions,　and　seismic　parameters.　Over　56,000　earthquake-triggered　landslides,　with　a　total　area　of　811　km(2),　are　interpreted　using　aerial　photographs　and　remote　sensing　images　taken　following　the　earthquake.　The　spatial　distribution　of　these　landslides　is　analyzed　statistically　using　both　landslide-point　density　(LPD),　defined　as　the　number　of　landslides　per　square　kilometer,　and　landslide-area　density　(LAD),　the　percentage　of　the　area　affected　by　landslides,　to　determine　how　the　occurrence　of　landslides　correlates　with　distance　from　the　epicenter,　distance　from　the　major　surface　rupture,　seismic　intensity　and　peak　ground　acceleration　(PGA),　slope　angle,　slope　aspect,　elevation,　and　lithology.　It　is　found　that　both　LAD　and　LPD　have　strong　positive　correlations　with　slope　steepness,　distance　from　the　major　surface　rupture　and　seismic　intensity,　and　that　Pre-Sinian　schist,　and　Cambrian　sandstone　and　siltstone　intercalated　with　slate　have　the　most　concentrated　landslide　activities,　followed　by　the　Permian　limestone　intercalated　with　shale,　and　Devonian　limestone.　Statistical　analyses　also　indicate　that　the　major　surface　rupture　has　influence　on　the　spatial　distribution　of　landslides,　because　LAD　and　LPD　are　relatively　higher　on　the　hanging　wall　than　on　the　footwall.　However,　the　correlation　between　the　occurrence　of　landslides　with　distance　from　the　epicenter　of　the　earthquake　is　complicated,　rather　than　a　relatively　simple　negative　correlation　as　found　from　other　reported　cases　of　earthquakes.　This　is　possibly　due　to　complicated　rupture　processes　of　the　earthquake.　(C)　2010　Elsevier　Ltd.　All　rights　reserved.