运用尾波干涉技术监测瑞昌—阳新M_(S)4.6地震后地壳介质变化  

Monitoring variations of crustal media after the M_(S)4.6 Ruichang-Yangxin earthquake by coda wave interferometry

作　　者：郭雨帆 董非非 查小惠 陈浩 王甘娇 董俊 Guo Yufan;Dong Feifei;Zha Xiaohui;Chen Hao;Wang Ganjiao;Dong Jun(Jiangxi Earthquake Agency,Jiangxi Nanchang 330096,China)

机构地区：[1]江西省地震局,江西南昌330096

出　　处：《地震科学进展》2022年第6期271-278,共8页Progress in Earthquake Sciences

基　　金：江西省防震减灾与工程地质灾害探测工程研究中心开放基金项目(SDGD202013);地震科技星火计划项目(XH20032)联合资助。

摘　　要：基于2011年瑞昌—阳新M_(S)4.6地震序列事件波形及其观测报告,采用双差重定位法、波形互相关法和尾波干涉法,筛选出了同时被黄梅台和九江台记录且波形互相关系数≥0.920的两组重复地震对:D_(1)(2011-09-1105:44 M_(L)2.3和2011-10-2408:06 M_(L)2.2)和D2(2011-09-1807:06 M_(L)2.8和2011-10-2408:06 M_(L)2.2),发现瑞昌—阳新M_(S)4.6地震后1.5个月内(2011-09-11—10-24)震源区S波早期尾波波速增加。Based on the event waveform data and its observation report of the 2011 Ruichang-Yangxin M_(S)4.6 earthquake sequence processed by the double-difference method,waveform cross-correlation and coda wave interferometry,two groups of repeating earthquakes(cc≥0.920,recorded by station Huangmei and station Jiujiang)can be obtained:D_(1)(2011-09-1105:44 M_(L)2.3 and 2011-10-2408:06 M_(L)2.2)and D_(2)(2011-09-1807:06 M_(L)2.8 and 2011-10-2408:06 M_(L)2.2).It could be found that the velocity of early S wave coda increased within 1.5 months(2011-09-11—10-24)in source region after the M_(S)4.6 Ruichang-Yangxin earthquake.

关 键 词：瑞昌—阳新M_(S)4.6地震 重复地震 尾波干涉法 地壳介质变化 

分 类 号：P315.31[天文地球—地震学]