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《Journal of Disaster Prevention and Reduction》 2016-04
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THE ANALYSIS OF THE DEFORMATION ANOMALY FEATURES BEFORE MERATE-STRONG EARTHQUAKES IN LIAONING AREA

KONG Xiang-rui;ZHAI Li-na;LI Meng-ying;QIAN Rui;WU Jian-ting;FU Cong;Earthquake Administration of Liaoning Province;Liaoyang Seismic Station;  
Based on the earthquake cases in China and related documents,we collect the information of the deformation precursor anomaly features before moderate-strong earthquakes in Liaoning and its neighbor areas,this paper analyzed the precursor anomaly features before earthquakes and built the index system of the deformation precursor subject.It shows that the deformation precursor anomalies of M ≥ 5.0 earthquakes have the features of wide distribution numerous anomalies,lasting longer,large amplitude of anomaly variation,synchronism and so on.The mainly feature of the earthquake-triggering deformation anomaly is broken annual variation abnormality,it's embodied in many dynamic features such as trend change and short-term acceleration;The anomaly is mainly focused on the range of 300 km or so;The Anomaly is mainly composed of tilt and strain;The duration is most of the medium to long term anomalies,and the time synchronization is better.
【CateGory Index】: P315.72
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