2014年云南盈江M_S6.1地震前后序列分布差异研究  

Research on Difference of Sequence Distribution before and after Yingjiang M_S6.1 Earthquake in Yunnan Province in 2014

作　　者：徐甫坤 张彦琪[1] 苏有锦[1] 

机构地区：[1]云南省地震局,云南昆明650224

出　　处：《地震研究》2015年第4期525-534,共10页Journal of Seismological Research

基　　金：中国地震局.震情跟踪课题(2015010109);云南省地震局青年科技人员传帮带项目联合资助

摘　　要：利用云南测震台网提供的波形数据及观测报告,采用LOC3D速度模型对2014年5月30日云南盈江MS6.1地震主震进行了精定位,用双差定位法对2014年5月24日至6月30日期间的余震进行了重新定位。结果显示:地震序列分布显示出较为精细的几何结构,5月24日盈江MS5.6地震序列与5月30日MS6.1地震序列的空间分布具有较大差异,反映为震群型地震,且MS5.6地震序列后期的余震存在向未来的MS6.1地震的震源集中的时空演化特征。Aiming on analyzing the temporal and spatial distribution of the sequence before and after the Yingjiang Ms6. 1 earthquake in Yurman on May. 30, 2014, basing on the waveform data recorded by Seismic Network of Yunnan Province and the corresponding observation reports, we relocated the mainshock by using the 3D velocity model of Yunnan and Sichuan provinces （LOC3D）, and then relocated the aftershock sequences during May. 24 and June. 30, 2014 by using the double-difference relocation algorithm. The result is showed that the distribution of the sequences revealed the local geometric structure of the rupture region, and there were great difference of the spatial distribution between Ms6. 1 earthquake sequence and Ms5.6 earthquake sequence, which indicated that the whole sequence was multiple main shock type. Furthermore the temporal and spatial distribution of later aftershocks of Ms5.6 sequences had a trend of converging to the epicenter of the further Ms6. 1 earthquake.

关 键 词：盈江地震 双差重定位 余震分布 LDC3D速度模型 

分 类 号：P315.72[天文地球—地震学]