Discussion on seismo-geological hazards induced by 2013 Lushan M_S7.0 earthquake and its seismogenic fault

Based on the field survey and investigation on lots of seismo-geological hazards induced by Lushan, Sichuan Province, M_S7.0 earthquake on April 20, 2013, this paper summarizes the distribution and development characteristics of landslide, collapse, sandy soil liquefaction, ground fissure and ground deformation. Meanwhile, the relationship between seismo-geological hazards and seismogenic faults of the earthquake is discussed. Collapse and landslide is specially serious in meizoseismal region and severely damaged region, which is exteriorly representative of the large destructive earthquake. The spots of sandy soil liquefaction are so few that their range and scale are limited. Ground fissure and ground deformation are not true sense of the earthquake surface rupture zone. According to the distribution and development characteristics of the seismo-geological disaster induced by Lushan earthquake in meizoseismal region and severely damaged region, we think that the Shuangshi-Dachuan fault, i.e., Longmenshan front-range fault, is the most possible seismogenic fault; and buried Dayi fault of the Longmenshan piedmont fault is also possible. On the other hand, the earthquake was possibly triggered by both of the faults.