广西地区中强地震前后环境应力场的时空演变特征

EVOLVEMENT CHARACTERS OF AMBIENT STRESS FIELD BEFORE AND AFTER MODERATE-STRONG EARTHQUAKES IN GUANGXI AREA

摘要:

应用P波初动半周期和地震震级资料测定环境应力值的方法,利用广西台网30多年地震观测记录资料,测算了广西及其邻区大量中、小地震震源处的相对剪切应力强度值.在此基础上研究了广西地区8个中强地震序列主震前后环境应力值的时空变化特征.

Abstract:

Based on the earthquake record data of Guangxi seismic network in more than 30 years, the ambient shear stress values around many middle and small earthquake sources in Guangxi and adjacent rigions are determined by using the method of half period in P wave first impulse and magnitude.Evolvement characters of the ambient stress values before and after 8 moderate-strong earthquakes in Guangxi is studied.