乾陵地震台地电场日变化特征及干扰因素分析
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摘要
该文对陕西乾陵地震台地电场日变化特征和常见的干扰因素进行分析。研究结果表明,地电场静日变化具有较为典型的单峰双谷形态,在发生地电暴时,高频成分明显增加,日变幅比静日有较大幅度的增加;存在的干扰主要是高压直流输电干扰、工业游散电流影响等;也有大风、降雨和雷电自然因素干扰;高压直流输电影响幅度的大小与入地电流的大小、距离及地下介质等因素有关;其他方面的干扰,是局部、短时间内电磁环境的变化而影响地电场的变化。
The diurnal variation characteristics of geoelectric field and common interference factors at Qianling Seismic Station in Shaanxi province are analyzed in this paper. The results show that the static diurnal variation of geoelectric field has a typical form of single peak and double valley. When a geoelectric storm occurs, the high frequency component increases obviously and thediurnal variation amplitude increases considerably compared with the static diurnal variation. The main disturbances are HVDC transmission interference, industrial drifting current influence, and natural factors such as gale, rainfall and thunder and lightning.The magnitude of influence of HVDC is related to the magnitude, distance and underground medium of ground current, and other disturbances are the changes of local and short time electromagnetic environment which affect the changes of geoelectric field.
The diurnal variation characteristics of geoelectric field and common interference factors at Qianling Seismic Station in Shaanxi province are analyzed in this paper. The results show that the static diurnal variation of geoelectric field has a typical form of single peak and double valley. When a geoelectric storm occurs, the high frequency component increases obviously and thediurnal variation amplitude increases considerably compared with the static diurnal variation. The main disturbances are HVDC transmission interference, industrial drifting current influence, and natural factors such as gale, rainfall and thunder and lightning.The magnitude of influence of HVDC is related to the magnitude, distance and underground medium of ground current, and other disturbances are the changes of local and short time electromagnetic environment which affect the changes of geoelectric field.
引文
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[6] 辛建村,谭大诚,赵菲,等.典型干扰对岩体裂隙优势方位计算结果的影响研究[J].地震,2017,37(4):112-122.
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[11] 徐文耀.地球电磁现象物理学[M].合肥:中国科学技术大学出版社,2009.
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[13] 赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004:1-7,272-274.
[14] 王同利,胡乐银,崔博文,等.北京城市轨道交通对地电场观测的干扰影响[J].地震地质,2013,35(4):887-893.
[15] 方炜,张国强,邵辉成,等.高压直流输电对地电场观测的影响[J].地震地质,2010,32(3):434-441.
[16] 孙君嵩,杜学彬.中国大陆地电暴时频特征[J].地震学报,2017,39(4):615-632.
[2] 叶青,杜学彬,周克昌,等.大地电场变化的频谱特征[J].地震学报,2007,39(4):382-390.
[3] Qing Ye,Ye Fan,Xuebin Du,et al.Diurnal characteristics of geoelectric fields and theirchanges associated with the Alxa Zuoqi MS 5.8 earthquake on 15 April 2015 (Inner Mongolia).Earthquake Science,2018,31:35-43.
[4] 崔腾发,杜学彬,叶青,等.中国大陆经纬链地电场日变化[J].地球物理学报,2013,56(7):2358-2368.
[5] 杜学彬,叶青,赵杰.地电场日变化研究[J].地震,2007,27(1):21-30.
[6] 辛建村,谭大诚,赵菲,等.典型干扰对岩体裂隙优势方位计算结果的影响研究[J].地震,2017,37(4):112-122.
[7] 马钦忠,钱家栋.地下电性非均匀结构对地电场信号的影响[J].地震,2003,23(1):1-7.
[8] 中国地震局科技监测司.地震及前兆数字观测技术规范(电场观测)[M].北京:地震出版社,2001:7-8.
[9] 谭大诚,赵家骝,席继楼,等.潮汐地电场特征及机理研究[J].地球物理学报,2010,53(3):544-555.
[10] 万永革.数字信号处理的MATLAB实现[M].北京:科学出版社,2007.
[11] 徐文耀.地球电磁现象物理学[M].合肥:中国科学技术大学出版社,2009.
[12] 张建国,张国勇,王晋萍.场电特性与防雷工程[J].山西气象,2003,52(3):47,63.
[13] 赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004:1-7,272-274.
[14] 王同利,胡乐银,崔博文,等.北京城市轨道交通对地电场观测的干扰影响[J].地震地质,2013,35(4):887-893.
[15] 方炜,张国强,邵辉成,等.高压直流输电对地电场观测的影响[J].地震地质,2010,32(3):434-441.
[16] 孙君嵩,杜学彬.中国大陆地电暴时频特征[J].地震学报,2017,39(4):615-632.