青海西北部ML4地震平静对中强地震的指示意义  

INDICATION SIGNIFICANCE OF ML4 EARTHQUAKES CALMS TO MODERATE AND STRONG EARTHQUAKES IN NORTHWEST QINGHAI

作　　者：胡维云 刘文邦[1] 李启雷[1] 孙玺皓 王培玲[1] HU Weiyun;LIU Wenbang;LI Qilei;SUN Xihao;WANG Peiling(Qinghai Earthquake Agency,Xining 810000,China)

机构地区：[1]青海省地震局,青海西宁810001

出　　处：《高原地震》2020年第1期14-17,共4页Plateau Earthquake Research

基　　金：青海省地震局2020年地震科学基金(项目编号:2020B06);青海省重大科技专项(项目编号:2019-ZJ-A10)联合资助。

摘　　要：本文对1980年以来青海西北部ML≥4地震活动特征进行了分析研究。结果显示,青海西北部共出现5次ML≥4地震显著平静异常,其后的8个月内在该地区均发生了中强地震,且中强地震前异常呈现出“长期平静—平静打破—震前平静—发震”的演化特征。据此研究结果,可为未来青海西北部震情趋势提供判定意见,为中强地震预测工作提供参考依据。In this paper,the seismic activity characteristics of ML≥4 in northwest Qinghai since 1980 was analyzed and studied.The results show that there are 5 significant quiet anomalies of ML≥4 earthquakes in the northwest of Qinghai,all of which correspond to the medium strong earthquakes in the following 8 months.The medium strong earthquakes after the end of the quiet show“long-term calm-break the calm—calm before the earthquake—seismogenic”.According to the research results,it can provide the judgment opinions about the earthquake situation trend in the northwest of Qinghai Province in the future,and provide the reference to the medium and strong earthquake prediction work.

关 键 词：青海西北部 ML≥4地震平静 中强地震 

分 类 号：P315.6[天文地球—地震学]