| 易县地震台四分量钻孔应变观测震前异常特征 |
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| 引用本文： | 赵慧琴,王艳,张肖,马栋.易县地震台四分量钻孔应变观测震前异常特征[J].地震地磁观测与研究,2017,38(4):132-136. |
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| 作者姓名： | 赵慧琴 王艳 张肖 马栋 |
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| 作者单位： | 1. 中国河北 071000 保定中心地震台;2. 中国河北 065800 文安地震台;3. 中国石家庄 050021 河北省地震局 |
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| 基金项目： | 中国地震局监测、预测、科研三结合一般课题（课题编号：CEA-JC/3JH-170409） |
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| 摘 要： | 通过对河北易县地震台钻孔应变资料进行处理,发现在2014年9月6日涿鹿4.3级和2015年9月14日昌黎4.2级地震前,该台四分量钻孔应变观测到显著前兆异常变化,与2012年5月28日唐山4.8级地震前出现的异常相似度较高,异常形态均表现为"来快去慢",均在极值附近维持数日后,逐渐恢复原值过程中发生地震。
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| 关 键 词： | 钻孔应变 前兆异常 异常特征 慢地震 |
Seismic observation of four component borehole strain at Yixian Seismic Station |
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| Zhao Huiqin,Wang Yan,Zhang Xiao,Ma Dong.Seismic observation of four component borehole strain at Yixian Seismic Station[J].Seismological and Geomagnetic Observation and Research,2017,38(4):132-136. |
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| Authors: | Zhao Huiqin Wang Yan Zhang Xiao Ma Dong |
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| Institution: | 1. Baoding Central Seismic Station, Hebei Province 071000, China;2. Wenan Seismic Station, Hebei Province 065800, China;3. Hebei Earthquake Agency, Shijiazhuang 050021, China |
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| Abstract: | Through processing the borehole strain data of Yixian Seismic Station in Hebei, the significant anomaly about the four component borehole strain at this seismic station was found before the Zhuolu M 4.3 earthquake on September 6, 2014 and Changli M 4.2 earthquake on September 14, 2015. And such anomalies are very similar with the phenomena before the Tangshan M 4.8 earthquake on May 28, 2012. The abnormal morphology showed the characteristics of "Come fast and Go slow", after several days to maintain in near the extremum, the earthquake occurred at the process of recovering to the original value. |
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| Keywords: | borehole strain precursor anomaly anomaly characteristics slow earthquake |
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