地震地磁观测与研究2025，Vol.46Issue(1)：37-41,5.DOI:10.3969/j.issn.1003-3246.2025.01.005
2021年贵州七星关MS 4.5地震序列重定位
Relocation of the Qixingguan MS 4.5 earthquake sequence in Guizhou Province in 2021
摘要
Abstract
The Qixingguan MS 4.5 earthquake sequence in Guizhou Province in 2021 is relocated by the double-difference algorithm in this paper,and the accurate locations of 93 events have been obtained.The results show that the epicenter distribution is more concentrated after relocation,and the aftershock sequence exhibits the characteristics of dense distribution in the early stage and scattered distribution in the later stage.The rupture caused by this earthquake may extend from deep to shallow depths.The early aftershock sequence is densely distributed in a northwest direction on the east side of the Zhuchang Fault,and it is initially inferred that the seismogenic fault is a shallow secondary fault developed on the east side of the Zhuchang Fault.关键词
七星关MS 4.5地震/余震序列/双差定位/时空特征Key words
Qixingguan MS 4.5 earthquake/aftershock sequences/double-difference location/spatiotemporal characteristics引用本文复制引用
陈国江,王丽艳,袁琦东,张金龙,鄢天柱,汪洋..2021年贵州七星关MS 4.5地震序列重定位[J].地震地磁观测与研究,2025,46(1):37-41,5.基金项目
贵州省地震局地震科技基金(项目编号:GZSDZJDZKJJJ202203,GZSDZJDZKJJJ202201,GZSDZJDZKJJJ202101) （项目编号:GZSDZJDZKJJJ202203,GZSDZJDZKJJJ202201,GZSDZJDZKJJJ202101）
