Deformation Anomalies before the February 12,2014,M_S7.3 Yutian Earthquake

作     者：Gao Lijuan Xing Ximin Gao Ge Zhang Zhiguang Teng Haitao 

作者机构：Earthquake Administration of Xinjiang Uygur Autonomous Region 

出 版 物：《Earthquake Research in China》 (中国地震研究（英文版）)

年 卷 期：2014年第28卷第4期

页      面：483-490页

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：sponsored by the Earthquake Science Foundation of Xinjiang China(201302) 

主　　题：The Yutian earthquake with Ms7. 3 Metal pendulum tilt-meter Precursor 

摘      要：The Yutian earthquake with M_S7.3 happened on February 12,2014. The precursor monitoring ability is weak in that area. We found tendency anomalies and middle- and short-term anomalies from metal pendulum tilt measurements in Hotan seismic station before the earthquake. And we also compared the anomalies with that of the M_S7.3 Yutian earthquake on March 21,2008. The tendency anomalies measured by the metal pendulum tiltmeter appeared since 2012 as tilting eastward. While the middle- and short-term anomalies were characterized by acceleration,pause and rapid change of tilt rate in two directions. The tendency anomalies of metal pendulum tilt records are the same before the two earthquakes. They both happened in the east direction. However,there are differences in duration,characteristic and earthquake intervals for the middle- and short-term anomalies.