川滇地区地震活动图像异常统计特征研究  

Study on statistical characteristics of seismic activity image in Sichuan-Yunnan area

作　　者：王霞[1,2] 宋美卿[1,2] 郭文峰[1,2] 李玉铰 WANG Xia;SONG Meiqing;GUO Wenfeng;LI Yujiao(Shanxi Earthquake Agency,Taiyuan 030021,China;Shanxi Taiyuan National Continental Rift Valley Dynamics Observation and Research Station,Shanxi Province 030025,China)

机构地区：[1]山西省地震局,太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西030025

出　　处：《地震地磁观测与研究》2024年第4期33-40,共8页Seismological and Geomagnetic Observation and Research

基　　金：2024年震情跟踪定向工作任务(项目编号:2024020101);太原大陆裂谷国家野外科学观测研究站研究课题(项目编号:NORSTY2021-01);地震预测开放基金(项目编号:XH24004D)。

摘　　要：基于《中国震例》,梳理总结了1966—2018年川滇地区120次5级以上地震震前6种地震活动图像异常及特征参数,并提出了各异常的半定量预测指标。结果显示,川滇地区6种地震活动图像异常按次数排序依次为:震前显著事件88次,地震平静42次,地震空区39次,地震条带25次,地震窗24次,震群11次;其中,4项异常多出现在中强震前的中短期阶段,多数中强震发生在这些异常区内及其附近地区;部分特征参数与中强震之间存在较好的线性关系,但在实际应用中还需结合其他观测异常来综合判定震情趋势。Based on the Earthquake cases in China,we comprehensively collected and summarized the image anomalies and characteristic parameters before 120 earthquakes with magnitude greater than 5 in Sichuan and Yunnan region from 1966 to 2018,and formed semi-quantitative prediction indicators of each anomaly.The results show that the six anomalies in Sichuan and Yunnan are in order of number:88 significant events before earthquakes,42 seismic quiescence,39 seismic gaps,25 seismic belts,24 seismic windows,and 11 earthquake swarms.Four anomalies occur in the short and medium term before the strong earthquake,and most of the strong earthquakes occur in or near these anomaly areas.There is a good linear relationship between some characteristic parameters and strong earthquakes,but it need to determine the seismic tendency prediction by combining other observation anomalies.

关 键 词：地震活动图像异常 中国震例 预测指标 川滇地区 

分 类 号：P315.6[天文地球—地震学]