基于大别造山带电磁测深数据的磁暴感应地电场分布特性分析
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TM151

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国家重点基础研究发展计划(973计划)


Analysis of the distribution characteristics of the geoelectric field induced by a magnetic storm based on the electromagnetic sounding data of the Dabie orogenic belt
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    摘要:

    为探明磁暴期间大别造山带的地面感应电场分布特性,通过引入大别造山带的大地电磁测深数据,结合2004年11月7日至9日强磁暴期间武汉地磁台站的秒级磁场数据,进而计算磁暴感应地电场的方法研究了磁暴期间地面感应电场频域下的电场强度幅值最大值及对应的频率分布。结果表明:磁暴期间频域下电场强度幅值分布不均匀,而且部分数值较大;频域下电场强度南北分量幅值普遍大于东西分量幅值;频域下电场强度幅值最大值对应频率分布相对集中,且频率数值较小,更加接近直流。可见在接近直流的频率下,会集中产生较大幅值的电场,对各种人工系统产生较大干扰,需引起足够重视。

    Abstract:

    In order to find out the distribution characteristics of the ground induced electric field in the Dabie orogenic belt during the geomagnetic storm, the magnetotelluric sounding data of the Dabie orogenic belt are introduced, and the geomagnetic field data of Wuhan geomagnetic station during the strong geomagnetic storm from November 7 to 9, 2004 are used to calculate the induced geoelectric field Frequency distribution. The results show that: during the geomagnetic storm, the amplitude distribution of electric field intensity in frequency domain is uneven, and some values are large; the amplitude of North-South component of electric field intensity in frequency domain is generally larger than that of East-West component; the frequency distribution corresponding to the maximum value of electric field intensity amplitude in frequency domain is relatively concentrated, and the frequency value is smaller, which is closer to DC. It can be seen that when the frequency is close to DC, the electric field with large amplitude will be generated, which will cause great interference to various artificial systems.

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王泽忠,张廉杰,司远,等. 基于大别造山带电磁测深数据的磁暴感应地电场分布特性分析[J]. 科学技术与工程, 2021, 21(12): 4944-4951.
Wang Zezhong, Zhang Lianjie, Si Yuan, et al. Analysis of the distribution characteristics of the geoelectric field induced by a magnetic storm based on the electromagnetic sounding data of the Dabie orogenic belt[J]. Science Technology and Engineering,2021,21(12):4944-4951.

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  • 收稿日期:2020-09-28
  • 最后修改日期:2021-02-26
  • 录用日期:2020-12-21
  • 在线发布日期: 2021-05-17
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