临汾台大地电场地震过程中的岩石裂隙方位角变化特征  

The Change Characteristics of Rock fracture Azimuth during the Earthquake of Linfen Station Geoelectric Field

作　　者：李军[1] LI Jun(Linfen Central Seismostation of Shanxi Earthquake Bureau,Linfen Shanxi 041000)

机构地区：[1]山西省地震局临汾中心地震台

出　　处：《河南科技》2019年第32期143-146,共4页Henan Science and Technology

基　　金：山西省地震局面上项目（SBK-1906）

摘　　要：使用SN/WE向大地电场裂隙优势方位角α对发生在临汾台100km范围内ML3.0以上地震进行解析,发现在没有干扰的情况下每次地震前方位角都会出现突跳变化,突跳一般出现在震前5天左右,震级越大,震方位角突跳出现时间越早。临汾南部地震方位角突跳形式表现为上升后下降,临汾北部地震方位角多表现为先下降后上升,分析结果表明,无干扰情况下的方位角突跳变化有可能作为孕震进入短临阶段的前兆信息及识别标志。SN/WE is used to analyze the ML3.0 or higher earthquakes occurring in the 100km range of Linyi station from the azimuth angleαof the ground electric field.It is found that there is a sudden change in the azimuth before each earthquake without interference.Generally,it occurs about 5 days before the earthquake.The larger the magni?tude,the earlier the azimuth jump occurs.Seismic azimuth jumps in the south of Linfen show a rise and then de?crease,and most of the earthquakes in the north of Linfen show a fall and then rise.The analysis results show that the change in azimuth jump without interference may be used as the precursor information and identification mark of the imminent imminent stage of pregnancy.

关 键 词：大地电场 裂隙优势方位角 变化特征 短临前兆 

分 类 号：P315.72[天文地球—地震学]