河北省地震前兆地电台观测背景  

Observation Background of Geo-electrical Precursor in Hebei Province

作　　者：牛露[1] 彭远黔[1] 孟立朋[1] 冉志杰[1] 韩和平[1] 

机构地区：[1]河北省地震局,河北石家庄050021

出　　处：《四川地震》2016年第3期34-39,共6页Earthquake Research in Sichuan

摘　　要：介绍了河北省现有4个地震前兆地电台站所处的地震活动环境、地震构造背景、台址下地层介质的电性结构;同时还分析了这4个地电台观测资料的映震能力,认为在特定的地震活动环境、断裂构造条件下有利于地电阻率前兆的观测时能够捕捉到地震前兆信息。地电台站观测中,高—低阻型电性断面或电性断面的高阻、低阻差别较大是具有较强地震映震能力的台址条件。分析认为,河北省北部地区目前为地电阻率异常失控区,需合理增设地电台站。The seismicity environment, the tectonic background and the electrical structures around four precursor observations of the geo-electric resistivity in Hebei Province are introduced in this paper. The response ability of the data recorded from these seismic stations is discussed as well. Our analysis shows that the seismic stations should be in the seismicity regions and also in the seismic fault region in order to capture the precursory information response to happening of earthquakes. The high-low geo-electrical resistant of an electrical profile or a larger difference rea- ches by 10 times between high and low geo-electrical resistance is a site condition to determine the location of a seismic station response to earthquakes. Our analysis also shows that in the northern regions of Hebei province there is a gap of the geo-electric resistance observation and new seismic stations of the geo-electric resistance are needed in order to capture the precursor information.

关 键 词：地电观测背景 地震映震能力 台址电性结构 

分 类 号：P315.722[天文地球—地震学]