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[1]段云歌,陈天长,苏金蓉,等.2013年芦山MS7.0地震余震序列震源机制一致性的时空变化*[J].地震研究,2018,41(02):251-257.
 DUAN Yunge,CHEN Tianchang,SU Jinrong,et al.The Temporal-Spatial Pattern of Focal Mechanism Consistency of Small Earthquake Sequence in Lushan[J].Journal of Seismological Research,2018,41(02):251-257.
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2013年芦山MS7.0地震余震序列震源机制一致性的时空变化*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
41
期数:
2018年02期
页码:
251-257
栏目:
出版日期:
2018-04-20

文章信息/Info

Title:
The Temporal-Spatial Pattern of Focal Mechanism Consistency of Small Earthquake Sequence in Lushan
作者:
段云歌1陈天长1苏金蓉1雷建设2唐 淋1吴 朋1
(1.四川省地震局,四川 成都 610041; 2.中国地震局地壳应力研究所,北京 100085)
Author(s):
DUAN Yunge1CHEN Tianchang1SU Jinrong1LEI Jianshe2TANG Lin1WU Peng1
(1. Sichuan Earthquake Agency,Chengdu 610041,Sichuan,China,)(2. Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China)
关键词:
芦山MS7.0地震 余震序列 谱振幅相关系数 震源机制一致性
Keywords:
Lushan 7.0 Earthquake aftershock sequence correlation coefficient of spectral amplitude focal mechanism consistency
分类号:
P315.7
DOI:
-
摘要:
利用体波谱振幅相关系数分析方法,对2013年4月20日至6月30日芦山MS7.0地震余震序列中四川地震台网固定台站记录的ML2.0~4.0地震的震源机制一致性进行了研究。将主要研究区分为5个子区,分区计算震群的平均相关系数。结果显示,同一时段内,震后2区平均相关系数最高,达0.809,随着与该区距离的增大而逐渐减小。4区2013年6月平均相关系数最低,仅为0.524; 整个研究区的总平均相关系数由0.785变至0.575。主震发生后,随着时间的推移,各子区内地震的平均相关系数均逐渐减小; 随着区域应力场能量的释放,震群的震源机制一致性逐渐变差。
Abstract:
The method of spectral amplitude correlation is used to research the focal mechanism consistency of aftershocks from ML2.0 to ML4.0 of Lushan MS7.0,which from 20th April to 30th June,2013. 5 subareas are set up for the research. The average correlation coefficient are calculate in each subarea,using the digital waveform records from permanent stations in Sichuan network. The result shows that the average correlation coefficient is highest in sub 2 just after the main earthquake,which reached 0.809,and the lowest one is 0.524 in sub 4 in June. The average correlation coefficient in the whole area reduced from 0.785 to 0.575. It is indicate that the average correlation coefficient in each subarea decreased as time goes by. It is highest in sub 2 in same period of time,and which decreased with the distance to the subarea. This shows that,the focal mechanism consistency of aftershocks gradually getting worse with the release of the regional stress field energy after main earthquake,and the focal mechanism become more disordered.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-10-27
基金项目:中国地震局监测、预测、科研三结合课题(162301)、(162302)联合资助.

更新日期/Last Update: 2018-04-23