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  张国苓,乔子云,贾立峰,梁红杰,韩和平,王艳荣.河北阳原台地电阻率变化分析[J].震灾防御技术,2015,10(2):464-471, DOI:10.11899/zzfy20150228.

河北阳原台地电阻率变化分析
摘要:    河北阳原台地电阻率NE测向2014年以来出现年变幅变小的年变畸变现象,经核实,这时的观测系统工作正常,而降雨量与地电阻率的异常变化具有一定的相关性,但通过褶积滤波法去除降雨量的影响后,这种异常变化依旧存在。同时,阳原台NE测向的地电阻率与自然电位在2014年的变化具有同步性,也进一步验证了异常变化的可靠性。阳原台地电阻率观测位于晋冀蒙交界地区,对地壳的应力-应变响应比较敏感,其地电阻率异常变化与1989年大同地震和1998年张北地震有较好的对应关系,并显示出持续时间长、幅度大和恢复慢的特点。因此,阳原台地电阻率异常变化的可信度较高,可为监测晋冀蒙交界地区的地震活动提供参考。
作者单位
张国苓 河北省地震局石家庄050021 
乔子云 河北省地震局石家庄050021 
贾立峰 河北省地震局石家庄050021 
梁红杰 河北省地震局石家庄050021 
韩和平 阳原地电台张家口075800 
王艳荣 三河地震台三河065200 
关  键  词:地电阻率  阳原  异常分析
DOI:10.11899/zzfy20150228
基金项目:国家自然科学基金(41274079)和震情跟踪定向工作任务(2015010403)共同资助
收稿日期:2015-02-01
作者简介:张国苓,女,生于1986年。河北省地震局工程师。主要研究方向:地震电磁学和地震预测研究。E-mail: zhangguoling002@163.com
通讯作者:
Analysis on the Anomaly of Resistivity at Yangyuan Station, Hebei Province
Abstract:      The Geoelectric resistivity monitoring from Yangyuan station detected that the annual amplitude of resistivity in NE direction became smaller since 2014. After verification, we found that the observation system is working properly and there was correlation between rainfall and ground resistivity. The abnormal is still exist after removing the effects of rain by convolution filtering method. The NE resistivity and natural potential changes in 2014 is synchronous, so the reliability of earth resistivity anomaly is improving. The ground resistivity variation has a good relationship with the history of earthquake group at Shanxi, Hebei and Inner Mongolia border area, such as 1989 Datong earthquake, 1998 Zhangbei earthquake, et al.. The anomaly of resistivity at Yangyuan station is sensitive to stress change of the earth crust. Therefore, the anomaly of the earth resistivity has a higher reliability to earthquake prediction, and we should pay close attention to the seismic activity at Shanxi, Hebei and Inner Mongolia border area.
Keywords:  Resistivity  Yangyuan Station  Anomaly analysis
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