Characteristic of Ground Liquid Abnormal Field prior to the Datong Yanggao Earthquake
Zhang Shu · Earthquake Research in Shanxi · 1999
Based on 27 item high reliability's ground liquid anomaly which are in 300km away the epicenter and were collected in 《China Earthquake》,space time characteristic of ground liquid point and abnormal course and correlation between field and epicenter are researched. with statistical method,The result indicates that characteristic of these anomalies point has synchronism in time and discrepancy in space.Medium term anomalies is controlled basically by regional stress field, appearance of short impending anomalies remarks the variation of the epicenter stress field , the abnormal distribution is affected by action of regional stress field and focal stress field.