地震工程学报2017，Vol.39Issue(z1)：60-64,82,6.DOI:10.3969/j.issn.1000-0844.2017.Supp.060
山东苍山5.2级地震前深井地电观测网点异常及其特征
Anomaly Features of Deep-well Geoelectricity Observed Prior to M5 .2 Earthquake in Cangshan,Shandong Province
摘要
Abstract
In this study,we analyzed observation data recorded prior to the occurrence of an M5 .2 earthquake in Cangshan county,Shandong province,which were recorded by eight deep-well geoelectric stations within a 100 km radius of the epicenter.The results reveal varying degrees of anomalies at all stations.Further analysis of these anomalies indicates that the anomalies ap-peared synchronously 26 months prior to the earthquake at three stations located at the cross sec-tion of the Yishu and Cangni faults;16 months prior to the earthquake at two stations located be-tween the two faults;and 13 months prior to the earthquake at two stations located several faults away from the epicenter.Our analysis of the anomaly features shows that their times of appear-ance and changes are related to the epicentral distance,tectonic position of the station,tectonic setting,and the direction of the principal compressional stress of the regional stress field.The re-search suggests that observations of deep-well geoelectricity networks are extracted directly from the internal bedrock and are significant for earthquake monitoring and prediction.关键词
深井地电/异常特征/沂沭带/5.2级地震Key words
deep-well geoelectricity/anomaly feature/Yishu fault zone/Shandong province/Can-gshan county/M5.2 earthquake分类
天文与地球科学引用本文复制引用
孟凯..山东苍山5.2级地震前深井地电观测网点异常及其特征[J].地震工程学报,2017,39(z1):60-64,82,6.
