2022年3月16日吉林松原宁江M 4.3地震前地震活动特征  

Analysis of Seismicity Feature before the Ningjiang,Songyuan M 4.3 Earthquake on 16 March,2022

作　　者：张洪艳[1] 刘宏岩[1] 陈卓[1] 张璇 张帆[1] ZHANG Hongyan;LIU Hongyan;CHEN Zhuo;ZHANG Xuan;ZHANG Fan(Jilin EarthquakeAgency,Changchun 130117,China)

机构地区：[1]吉林省地震局,长春130117

出　　处：《华北地震科学》2024年第2期109-112,共4页North China Earthquake Sciences

基　　金：吉林省地震局青年科技发展课题(JZQ-202204)。

摘　　要：针对2022年3月16日吉林松原宁江发生的M 4.3地震前的测震学资料及相关方法进行了震例回溯,发现此次地震前测震学方面存在3项异常:ML 3.0地震条带、视应力(2.5≤ML≤3.1)高值、b值趋势下降,三项异常均为中长期异常。结合松原宁江区以往的震例总结报告,综合分析认为这3项异常预测意义明确,对松原宁江地区中强地震的震情趋势分析具有一定的指示意义。An M 4.3 earthquake occurred in Ningjiang,Songyuan,Jilin on 16 March,2022,the seismometric data and related methods were reviewed before the M 4.3 earthquake,three seismometric anomalies were revealed:the seismic belt of ML≥3.0 earthquakes;high value of apparent stress;continuous decline of b value.The three anomalies are all mid-long term.Combined with the summary of previous earthquake cases in this district,we found that the scientific significance of the three anomalies is clear,which has certain indicative meaning for seismic tendency of medium-strong earthquake in Ningjiang,Songyuan region.

关 键 词：吉林松原宁江 视应力 地震条带 B值 

分 类 号：P315.63[天文地球—地震学]