Field Investigation and Cause Analysis of the Wanzhuang Collapse Earthquake in Pingyi County

Through investigation on the disaster of the Pingyi M3.1 earthquake (collapse), we analyzed the causes of the collapse mechanism, discussed the seismic tectonic significance combining with the tectonic background, and then put forward the prevention measures, including relocating the vicinity and village above the mined out area, backfilling the mined out area, prohibiting ready-made size of the the mined out area to continue production.