AN ANCIENT EARTHQUAKE DISCOVERED IN HAICHENG EARTHQUAKE REGION
Han Dianzhong; Lei Qingqing; Liu Jian; Shi Shengchang ( Seisimological Bureau of Liaoning Province )
On the basis of mapping of active faults in Haicheng region, an ancient earthquake trench was found in Shuiquan of central section of meizoseismal region. The surface rupture zone of Haicheng earthquake with Ms= 7.3 was controlled by it. Through trenching an earthquake fault which was filled by ancient earthquake wedge was found.