Study on the Criterion of the Correlation between Deformation Precursors and Earthquakes

作者：NIU Anfu,ZHAO Jing,YAN Wei,ZHANG Jing,ZHANG Lingkong,YUAN Zhengyi,YUE Chong

摘要：The relationship between pre-seismic anomalous changes and earthquakes is one of the most basic information to comprehend the process of earthquake preparation and conduct earthquake prediction research.However,few researchers have carried out relevant investigations for a long time.In this paper,the distribution characteristics of deformation anomalies before the Wenchuan earthquake are analyzed,and the widespread distribution area is discussed.Based on previous studies,we improve the relationship between anomaly duration t and magnitude M by introducing distance D.The new model is characterized by lower magnitude fitting error,making it possible to establish the correlation between deformation precursors and earthquakes.The correlation standard between precursors and earthquakes here is defined as Niu's criterion,which is applied to analyze and interpret the relationship between the shortterm anomalies of Hongliuxia fault leveling and the Wenchuan and Jiuzhaigou earthquakes.

发文机构：China Earthquake Networks Center

关键词：EARTHQUAKEDeformationprecursorsCorrelationcriterion

分类号： P31[天文地球—固体地球物理学]