摘要
对苍山5.2级地震前距震中23km的临沂台深井地电观测资料进行了分析.结果表明,震前该台电阻率和自然电位出现了长达5年的与地震活动性异常同步的趋势异常.震前6个月电阻率出现下降异常.震前24天自然电位和电阻率同时急剧下降。
Through analysis on deep well geoelectricity data of Linyi station which is 23 km away from the epicentre of the Cangshan M S 5.2 earthquake,it is shown that before the earthquake,the background tendency anomalies of the deep well resistivity and natural geoelectric potential appeared synchronously with the seismicity anomaly for 5 years.The descending tendency anomaly of deep well resistivity occurred six months before the earthquake.The natural geoelectric potential and resistivity reduced rapidly 24 days before the earthquake,and then rose again abruptly after the earthquake.
出处
《西北地震学报》
CSCD
1998年第1期91-95,共5页
Northwestern Seismological Journal
关键词
苍山地震
电阻率
地电异常
临沂台
地震前兆
Resistivity, Natural geoelectric potential, Anomaly, Shandong, Cangshan M S 5.2 earthquake, Linyi station