| 首都圈数字电磁波变化特征 |
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| 引用本文： | 张国苓,;乔子云,;贾立峰,;张建国,;王艳荣.首都圈数字电磁波变化特征[J].地震地磁观测与研究,2014(1):104-108. |
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| 作者姓名： | 张国苓 ;乔子云 ;贾立峰 ;张建国 ;王艳荣 |
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| 作者单位： | [1]河北省地震局,中国石家庄050021; [2]邯郸地震中心台,中国河北056006; [3]昌黎地电台,中国河北066600 |
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| 基金项目： | 由国家自然科学基金（41274079）和中国地震局青年震情跟踪工作任务（2013020408）资助 |
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| 摘 要： | 选取首都圈地区红山、昌黎、怀来、昌平流村、密云牛栏山等11个地震台的数字电磁波资料，利用最大熵谱法，对其分钟值和时值资料进行谱成分分析，发现数字电磁波日变化12 h半日波和24 h全日波的成分较强。通过环境调研和对比分析，总结数字电磁波的常见干扰源为地电阻率干扰和地铁干扰等，干扰形态分别为地电阻率供电时段5 min左右的远超数字电磁波本底的扰动和地铁运行时段的正脉冲变化。
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| 关 键 词： | 数字电磁波 最大熵谱 日变 干扰 |
The study of electromagnetic data at metropolitan area |
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| Institution: | Zhang Gouling, Qiao Ziyun, Jia Lifeng, Zhang Jianguo, Wang Yanrong( 1) Earthquake Administration of Hebei Province, Shijiazhuang 050021, China 2) Handan Seismic Station, Hebei Province 056006, China 3) Changli Seismic Station, Hebei Province 066600, China) |
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| Abstract: | The spectrum characteristics of electromagnetic diurnal variation have been identified by maximum entropy method,based on electromagnetic data from eleven stations at Chinese metropolitan area,including Hongshan,Changli and Huailai,etc.This study shows that,the amplitude of the 12 h and 24-25 h semidiurnal wave is larger than others.The disturbance sources of electromagnetic date include geo-resistivity power supply and subway interference. The interference pattern caused by supplying periods of earth resistivity is electromagnetic disturbance far more than the background about 5 min,and that caused by subway is positive pulse change at the running time. |
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| Keywords: | electromagnetic data maximum entropy method diurnal variation disturbance sources |
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