| 摘要: |
| 基于通州地表地电阻率在1976年唐山M7.8地震前有明显前兆异常以及通州新建井下小极距地电阻率在2020年古冶M5.1地震和2021年滦州M4.3地震前出现的异常变化,从台站周边构造环境、地震特征等方面进行对比分析,认为通州台地电阻率对唐山地区中强地震的中短期映震能力比较强。同时分析结果也显示在目前观测环境条件下,井下小极距地电阻率再现了通州台地电阻率对周边地区中强地震具有较强地映震能力。 |
| 关键词: 通州地电阻率 井下小极距 中强地震 映震能力 唐山地区 |
| DOI： |
| 分类号:P315 |
| 基金项目:国家星火计划项目(XH20210401)、中国地震局冬奥会保障晋冀蒙监测能力提升项目共同资助 |
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| Analysis of Tongzhou Resistivity Reflecting of Moderate and Strong Earthquakes in Tangshan |
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Wang Tongli, Cui Bowen, Li Ran, Wang Lihong, Hu Yitao, Xing Hailin, Li Jingshan
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Beijing Earthquake Agency, Beijing 100080, China
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| Abstract: |
| The surface resistivity measured at the Tongzhou station changes before and after the Tangshan M7.8 earthquake in 1976,and the similar resistivity changes from small well were also detected before the Tangshan Guye M5.1 in 2022 and the Tangshan Luanzhou M4.3 in 2021. In this paper we study the change mechanism of resistivity based on the tectonic surrounding the Tongzhou station,measuring ability of resistivity and the characteristics of medium-strong earthquake. The results show that the resistivity changes of Tongzhou is sensitive to the moderate and strong earthquake in Tangshan region,the small well resistivity is more significant changes before and after the earthquake than surface resistivity. |
| Key words: The Tongzhou resistivity The small well resistivity Moderate and strong earthquake Seismic reflection capacity Tangshan region |
