地电阻率临震异常特征及短临预报问题  

FEATURES OF IMPENDING ANOMALY OF EARTH RESISTIVITY AND SHORT-TERM AND IMPENDING PREDICTION

作　　者：汪志亮[1] 赵成达[1] 余素荣[1] 王志贤[2] 

机构地区：[1]国家地震局分析预报中心,中国北京100036 [2]河北省地震局,中国石家庄050021

出　　处：《地震》1996年第1期75-79,共5页Earthquake

基　　金：地震联合基金资助的课题(93046)

摘　　要：文中对大震、强震和中强地震的地电阻率临震异常特征采用统计方法,分别讨论了临震异常在趋势异常各时段中发震的概率。 大震能观测到短临异常的震例只有33.3％,强震和中强地震分别为50.0％。出现短临异常后1—20天内发震的概率最高达94.4％。 对地电前兆异常的时间、空间和短临监测预报工作等问题进行了探讨,其结果对地震监测预报工作有实用意义。Authors computed the posibilities of the growth of impending anomalies during each time interval of trend anomalies by using the statistical method based on impending anomalous features of the earth resistivity form strong and moderate earthquakes. There are only 33.3% of the large shocks before which the impending precursory anomalies can be observed and 50% of strong and moderate shocks do. The posibility of earthquake occurrence is 94.4% during twenty days after the appearance of impending anomalies . Authors also discussed the time, space, impending observation and prediction of geoelectrical precursory anomalies. The results are important for the practice of earthquake observation and prediction.

关 键 词：地电阻率 临震异常 异常特征 短临预报 地震预报 

分 类 号：P315.7[天文地球—地震学]