| 河北地区地电场观测数据地电暴变化特征 |
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| 引用本文： | 罗娜,乔子云,赵志远,张波,王静,吴鹤帅.河北地区地电场观测数据地电暴变化特征[J].地震地磁观测与研究,2019,40(6):53-61. |
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| 作者姓名： | 罗娜 乔子云 赵志远 张波 王静 吴鹤帅 |
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| 作者单位： | 中国河北 054000 红山基准地震台;中国石家庄 050021 河北省地震局 |
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| 基金项目： | 河北省地震科技星火计划（项目编号：DZ20170510050，DZ20190422037）；中国地震局科技星火计划（项目编号：XH17004Y） |
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| 摘 要： | 选取河北省6个地电台站地电场观测数据,分析地电场静日和地电暴期间的波形变化,讨论地电暴期间不同台站之间急始脉冲和急始变幅差异性,认为:地下介质不均匀性造成地电暴急始脉冲相位不同;地电暴急始变幅差异与观测台址表层电阻率大小关系密切。应用最大熵谱方法提取频谱成分,发现地电暴日高频短周期成分更加丰富,优势周期约1.6 h。
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| 关 键 词： | 地电场 地电暴 磁暴 最大熵谱 |
Analysis of the geoelectric storm characteristics of geoelectric field observation data in Hebei area |
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| Luo Na,Qiao Ziyun,Zhao Zhiyuan,Zhang Bo,Wang Jing,Wu Heshuai.Analysis of the geoelectric storm characteristics of geoelectric field observation data in Hebei area[J].Seismological and Geomagnetic Observation and Research,2019,40(6):53-61. |
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| Authors: | Luo Na Qiao Ziyun Zhao Zhiyuan Zhang Bo Wang Jing Wu Heshuai |
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| Institution: | 1.Hongshan Benchmark Seismic Station, Hebei Province 054000, China;2.Hebei Earthquake Agency, Shijiazhuang 050021, China |
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| Abstract: | By selecting the observation data of the geoelectric field from 6 stations in Hebei Province, the quiet day changes of geoelectric field and the changing waveform shape of the geoelectric storm are analyzed. By discussing the sudden commencement pulse and sudden variable amplitude difference among different stations during the geoelectric storm, we consider that the inhomogeneity of underground medium results in different phase features of the sudden commencement pulse of the geoelectric storm and the sudden variable amplitude difference of the geoelectric storm relates closely to the surface conductivity of the observation stations. The spectrum composition characteristics is extracted by the use of the maximum entropy spectra method, the geoelectric storm daily component of high frequency is more abundant and the dominant period is about 1.6 h. |
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| Keywords: | geoelectric field geoelectric storm magnetic storm maximum entropy method |
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