2012年新源—和静M_S6.6地震视应力变化分析  

About apparent stress change of Xinyuan-Hejing M_S6.6 earthquake in the year 2012

作　　者：李艳永[1] 王范霞 聂晓红[1] 向元[1] 

机构地区：[1]新疆维吾尔自治区地震局,中国乌鲁木齐830011 [2]温泉地震台,中国新疆维吾尔自治区833400

出　　处：《地震地磁观测与研究》2016年第6期16-20,共5页Seismological and Geomagnetic Observation and Research

基　　金：测震青年骨干专项(项目编号:20160526)

摘　　要：利用2009年1月—2012年12月宽频带数字地震波形资料,基于Matlab平台,应用SWAS程序,计算新疆新源—和静M_S 6.6地震震源区中小地震的震源参数,分析地震前后视应力变化特点,探寻震源区应力状态。结果表明:新源—和静M_S 6.6地震视应力具有明显的"高值—回落—高值发震—震后降低"的特点,震级与地震矩对数、拐角频率、震源破裂半径及矩震级成一定线性相关性,且与视应力值存在一定相关性。In this paper, using the data of small earthquakes recorded since 1970 and broadband digital seismic wave recorded from January 2009 to December 2012, the hypocentral parameter and apparent stress of Xinyuan-Hejing MS 6.6 earthquake is calculated with the program SWAS based on Matlab platform, and the apparent stress change characteristics is also analyzed. The main results show： there is a linear correlation between the magnitude, the logarithm of the seismic moment, the corner frequency, the rupture radius of the source and the moment magnitude; There is also a certain correlation between the magnitude and the value of the apparent stress; the seismic apparent stress has obvious the characteristics of ＂high value—down—the high value occurred earthquake—reduced after earthquake ＂.

关 键 词：新源—和静MS 6.6地震 震源参数 视应力 

分 类 号：P315.727[天文地球—地震学]