2023年福建连城小震群活动分析  

作　　者：赵文波[1] 李强[1] 黄艳丹[1] 

机构地区：[1]福建省地震局,福州350003

出　　处：《科技创新与应用》2024年第28期98-101,共4页Technology Innovation and Application

基　　金：福建省地震局科技基金面上项目(M202301)。

摘　　要：2023年7月30日至8月15日,福建连城地区发生一组小震群活动,短时间内共计发生69次ML0以上地震,时空密集特征明显。该文分别从地震地质背景、地震受调整情况、震源机制解以及地震视应力角度,对该震群的活动特征和震源特征进行分析。结果显示,该震群受潮汐引力调制作用影响相对较小;震源机制均为走滑型,且一致性相对较高;地震视应力反映其震区应力目前处于正常水平。From July 30 to August 15,2023,there was a series of minor seismic cluster activities in Liancheng,Fujian Province,with a total of 69 earthquakes of ML0 and above occurring in a short period,exhibiting distinct spatiotemporal clustering characteristics.This paper analyzes the activity and source characteristics of this seismic cluster from the perspectives of seismic geological background,seismic adjustment situation,focal mechanism solution,and seismic apparent stress.The results indicate that the influence of tidal gravitational modulation on this seismic cluster is relatively small;the source mechanisms are predominantly strike-slip with relatively high consistency;the stress reflected by the seismic apparent stress suggests that the stress level in the seismic zone is currently normal.

关 键 词：小震群 震群活动 震源机制 地震视应力 福建连城 

分 类 号：P315[天文地球—地震学]