晋冀蒙交界地区中强地震前地震活动图像异常特征  

Characteristics of Seismic Activity before the Medium-strong Earthquakes in the Bordering Region of Shanxi,Hebei and Inner Mongolia

作　　者：李丽[1] 孟令媛[2] 吴昊昱[1] 李玉铰 陈慧 LI Li;MENG Lingyuan;WU Haoyu;LI Yujiao;CHEN Hui(Shanxi Earthquake Agency,Taiyuan 030021,Shanxi,China;China Earthquake Networks Center,Beijing 100045,China)

机构地区：[1]山西省地震局,山西太原030021 [2]中国地震台网中心,北京100045

出　　处：《地震研究》2022年第4期581-591,共11页Journal of Seismological Research

基　　金：2021年度地震预测开放基金项目(2021EF0F07);山西省应用基础研究计划面上青年基金项目(201901D211549);地震科技星火计划项目(XH210402Y)联合资助。

摘　　要：对晋冀蒙交界地区1970年以来M_(S)≥5.5地震前的地震活动图像时空演化特征进行了梳理,结果表明,M_(S)≥5.5地震前地震活动图像,如地震空区、地震条带、地震活动显著增强、显著地震或震群等指标,均出现了异常。异常图像的空间演化基本上围绕主震震源区或在其附近发生,这些地震活动图像异常对未来主震的时、空、强预测具有一定的指示意义。异常图像的时间演化特征在不同震例前也具有高度的一致性,符合非均匀介质中坚固体孕震模式。显著地震或震群基本上是在地震空区、地震条带、地震活动显著增强等图像异常的后期出现,表明地震活动图象异常对主震的时间和地点预测有较好的指示意义。The temporal and spatial evolution characteristics of seismic patterns before the M_(S)≥5.5 earthquakes in the bordering region of Shanxi,Hebei and Inner Mongolia since 1970 are collated.The results show that before the M_(S)≥5.5 earthquakes,the anomalies of seismic patterns such as seismic gaps,seismic bands,significantly increased seismicity,and significant earthquakes or earthquake swarms,are universal.The spatial evolution of anomalies basically occurs around the focal region or its vicinity,and these anomalies have some certain indicative significance for the prediction of time,space and magnitude of the main earthquake in future.The anomalies of seismic patterns evolve consistently before different earthquake cases,which is in line with the seismogenic solid model in heterogeneous media.Significant earthquakes or earthquake swarms basically occur in the late period of the anomalies of seismic patterns;this well indicates the time and place of the main earthquake in future.

关 键 词：晋冀蒙交界地区 地震空区 地震条带 地震活动 显著地震 震群 

分 类 号：P315.5[天文地球—地震学]