|本期目录/Table of Contents|

[1]高方鸿,刘志坤,耿传涛.2020年云南东川ML4.2地震序列精定位研究[J].地震研究,2022,45(01):48-53.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0006]
　GAO Fanghong,LIU Zhikun,GENG Chuantao.Accurate Location of the 2020 Dongchuan,Yunnan ML4.2 Earthquake Sequence[J].Journal of Seismological Research,2022,45(01):48-53.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0006]
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2020年云南东川ML4.2地震序列精定位研究(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
45
期数:
2022年01期
页码:
48-53
栏目:
出版日期:
2022-01-20

文章信息/Info

Title:
Accurate Location of the 2020 Dongchuan,Yunnan ML4.2 Earthquake Sequence
作者:
高方鸿; 刘志坤; 耿传涛
(中国地质大学(北京)地球物理与信息技术学院,北京100083)
Author(s):
GAO Fanghong; LIU Zhikun; GENG Chuantao
(School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China)
关键词:
地震定位;  微震检测;  小江断裂带;  双差定位法;  拉分盆地;  东川ML4.2地震
Keywords:
earthquake location;  microseismic detection;  the Xiaojiang Fault Zone;  double-difference earthquake location;  pull-apart basin;  Dongchuan ML4.2 earthquake
分类号:
P315.73
DOI:
10.20015/j.cnki.ISSN1000-0666.2022.0006
摘要:
利用云南东川地区10个宽频带流动台站的连续波形数据,采用基于深度学习的自动震相拾取方法和震相关联技术,对2020年东川ML4.2地震序列分别进行绝对定位和相对定位,获得了该地震序列的高精度地震定位结果,得到东川ML4.2地震序列的212个余震事件,约为中国地震台网目录给出的余震数目的5倍,丰富了ML≤3.0余震; 精定位结果表明东川ML4.2主震震源深度为5.19 km,余震震源深度集中在3～6 km,余震序列分布长轴呈NNE向展布; 此次地震发生在小江断裂带西支,发震构造与乌龙拉分盆地的构造演化有关。
Abstract:
Selecting the continuous waveform data from 10 temporary broadband seismic stations in Dongchuan,Yunnan Province,and using the automatic seismic phase detection and correlation based on deep learning,we conduct absolute and relative locations of the July 8th,2020 Dongchuan ML4.2 earthquake sequence,and obtain high-resolution results:the ML4.2 earthquake sequence contains 212 events,about five times of the events from the catalogue of China Earthquake Networks Center,enriching the ML<3.0 aftershocks.The focal depth of the ML4.2 mainshock is 5.19 km and the aftershock sequence concentrates in the depth of 3—6 km.The Long axis of the aftershock zone is in the NNE direction.The earthquake sequence occurs in the west branch of the Xiaojiang Fault Zone and its seismogenic structure may be related with the tectonic evolution of the pull-apart Wulong Basin.

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备注/Memo

备注/Memo:
收稿日期:2021-09-05
基金项目:国家自然科学基金(41774062)资助.

更新日期/Last Update: 2022-01-20