|本期目录/Table of Contents|

[1]孙 楠,贺素歌,刘自凤,等.2021年老挝MS6.0地震序列研究[J].地震研究,2025,(01):1-9.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0001 ]
　SUN Nan,HE Suge,LIU Zifeng,et al.Study of the Laos MS6.0 Earthquake Sequence in 2021[J].Journal of Seismological Research,2025,(01):1-9.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0001 ]
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2021年老挝MS6.0地震序列研究(PDF)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
期数:
2025年01期
页码:
1-9
栏目:
出版日期:
2024-12-20

文章信息/Info

Title:
Study of the Laos MS6.0 Earthquake Sequence in 2021
作者:
孙 楠; 贺素歌; 刘自凤; 李利波
(云南省地震局,云南 昆明 650224)
Author(s):
SUN Nan; HE Suge; LIU Zifeng; LI Libo
(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)
关键词:
老挝MS6.0地震;  前震序列;  余震序列;  序列参数
Keywords:
the Laos MS6.0 earthquake;  foreshock sequence;  aftershock sequence;  sequence parameter
分类号:
P315.72
DOI:
10.20015/j.cnki.ISSN1000-0666.2025.0001
摘要:
云南地震活动与周边强震存在“构造相连,动力同源”的特征,研究周边强震的序列演化特征及发震构造,对云南地区地震研究具有重要意义。2021年12月24日老挝MS6.0地震发生在滇西南地区的NW向整董断裂附近,震源机制解显示,此次地震是一次走滑型破裂事件,破裂方向与区域构造特征一致。老挝MS6.0地震序列属于前震-主震-余震型序列,主震前震中附近出现3～4级地震非常活跃的现象,前震序列参数计算显示b值波动相对幅度较大,h值出现“上翘”形态,而余震序列b值和h值变化均相对平稳,主震的同震库伦应力结果表明老挝地震可能对云南地区有应力加载作用。
Abstract:
The seismicity in Yunnan is related with the strong earthquake activities in its surrounding areas because of their “joint structures and homologic driving forces” .So,study of the earthquake evolution and the seismogenic structures in the vicinity will help predict the earthquakes in Yunnan.On November 24,2021,the Laos MS6.0 earthquake occurred near the Zhengdong fault in Southwest Yunnan.Its focal mechanism reveals that the earthquake is a strike-slip fracture event.The rupture extends in consistent with the regional tectonic trend.The Laos MS6.0 earthquake sequence is a typical foreshock-mainshock-aftershock sequence.The foreshock sequence has abundant MS3.0 and MS4.0 earthquakes.According to the parameters of the foreshock sequence,before the main shock the calculated b-value fluctuates with large amplitude,and h-value has an upward trend.On the other hand,in the aftershock sequence,variation of b-value and h-value is relatively stable.In addition,the coseismic Coulomb stress caused by the MS6.0 mainshock may have a stress-loading effect on Yunnan region.

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备注/Memo

备注/Memo:
收稿日期:2024-01-18.
基金项目:云南省重点研发项目(社会发展专项)(202203AC100003); 云南省地震科技创新团队(CXTD202405).
第一作者简介:孙 楠(1987-),高级工程师,主要从事地震学与地震预测研究工作.E-mail:China_yn_sn@163.com.
更新日期/Last Update: 2025-01-01