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地震 ›› 2015, Vol. 35 ›› Issue (4): 43-52.

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芦山MS7.0与岷县漳县MS6.6地震前电磁扰动异常变化

刘君1,2, 安张辉1,2, 范莹莹1,2, 杜学彬1,2, 崔腾发1,2   

  1. 1.中国地震局地震预测研究所兰州科技创新基地, 兰州 730000;
    2.中国地震局兰州地震研究所, 兰州 730000
  • 收稿日期:2015-01-09 出版日期:2015-10-31 发布日期:2020-06-28
  • 作者简介:刘君(1984-), 女, 甘肃兰州人, 硕士研究生毕业, 主要从事地震电磁学研究。
  • 基金资助:
    中国地震局预测研究所基本科研业务费专项(2014IESLZ06)和国家自然科学基金(41374080)资助

Anomalous Electromagnetic Disturbances before the 2013 Lushan MS7.0 and Minxian—Zhangxian MS6.6 Earthquakes

LIU Jun1,2, AN Zhang-hui1,2, FAN Ying-ying1,2, DU Xue-bin1,2, CUI Teng-fa1,2   

  1. 1. Lanzhou Base of Institute of Earthquake Science, CEA, Lanzhou 730000, China;
    2. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China
  • Received:2015-01-09 Online:2015-10-31 Published:2020-06-28

摘要: 应用四川芦山MS7.0和甘肃岷县漳县MS6.6地震震中周围部分电磁扰动观测台站资料, 主要利用电磁扰动原始波形比较以及电磁脉冲能量分析两种方法, 对两次地震前电磁扰动观测资料进行分析研究。 结果表明: ① 两次地震前4个电磁扰动台站原始曲线出现异常变化, 主要表现形式为观测值脉冲信号频繁突跳、 增大以及震前波形畸变、 反复出现阶跃; ② 两次地震前, 电磁扰动台站都记录到了明显的脉冲能量增大的异常现象, 主要异常出现的时间在几天~2个多月; ③ 电场分量和磁场分量都在地震前记录到了异常变化, 但反映出的异常时间及变化幅度不同步。 对于研究所得结果, 从地震电磁辐射的产生机制方面进行了尝试性的理论解释。

关键词: 电磁扰动异常变化, 芦山MS7.0地震, 岷县漳县MS6.6地震

Abstract: Based on data of electromagnetic disturbance observation stations surrounding the epicenters of the Lushan MS7.0 and Minxian—Zhangxian MS6.6 earthquakes, we mainly use the original waveform comparison of electromagnetic disturbances and statistical of the electric magnetic field pulse energy, and analyze the data of electromagnetic disturbance stations before the two earthquakes. The results show that: ① The abnormal changes in the original waveform before the two earthquakes showed mainly in the forms of frequent sudden jump and increases of pulse signal for the observed values, and waveform distortion and repeated steps before earthquakes. ② The increased energy of the geo-magnetic field pulse are recorded at the geo-electromagnetic disturbance stations before two earthquakes, which basically appeared in a few days to 2 months before the earthquake. ③ Abnormal changes in the electric component and magnetic field components are recorded before earthquake, but the magnitude of change and the abnormal time are not synchronized. From the results obtained, a tentative theoretical explanation has been presented in terms of the generation mechanism of seismic electromagnetic radiation from the two earthquakes.

Key words: Electromagnetic disturbance, The 2013 Lushan MS7.0 earthquake, The 2013 Minxian—zhangxian MS6.6 earthquake

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