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《Chinese Journal of Geophysics》 2016-01
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The spatio-temporal characteristics of geomagnetic induction vectors in North China

WANG Qiao;HUANG Qing-Hua;Department of Geophysics,School of Earth and Space Sciences,Peking University;  
More than five years′variations of geomagnetic induction vectors for 13 geomagnetic stations in North China were obtained by using the robust estimation method,which has been verified and compared with the ordinary least square and the weighted least square methods.We proposed the following three principles of selecting a specified period of the results from the robust estimation method:(a)the relatively higher coherency between horizontal and vertical component at this period,(b)the much more stable results of the robust estimation at this period,and(c)the skin depth within the crust for the period.After investigating the stability of coherency resulting from different time window(one day and ten days),we chose the results with640 second period for all stations finally,to be analyzed forward.Significance annual background variations were revealed from the time series results of the geomagnetic induction vectors with640 second period,and were extracted the long-term background(more than six months)from them using the Fourier harmonic analysis.A similar phase variation was obtained for most station excepting DAL,BJI and JIH stations,possibly related to different underground conductive structures.The further statistical analyses of the geomagnetic vectors of BJI,JIH,LYH,WHN,HUH and TAY stations indicated that a relatively higher conductivity layer might existaround these stations,while the results of QIX,TSY,LZH,TAA and MAL stations showed some complexity of the electrical conductivity structures in the crust.After removing the longterm background from the time series,we found that there exists a rough monthly variation of the geomagnetic induction vectors.Such period variation is consistent with the geomagnetic activity index,and may relate to the period of the solar rotation.
【Fund】: 973计划(2014CB845903);; 国家杰出青年基金项目(41025014)资助
【CateGory Index】: P318;P315.721
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【Citations】
Chinese Journal Full-text Database 1 Hits
1 RONG Yang-Ming,WANG Qiao,DING Xia,HUANG Qing-Hua Department of Geophysics,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Non-uniform scaling behavior in Ultra-Low-Frequency(ULF) geomagnetic signals possibly associated with the 2011 M9.0 Tohoku earthquake[J];Chinese Journal of Geophysics;2012-11
【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 GAO Shu-De1,TANG Ji2,SUN Wei-Huai3 1 Lanzhou Institute of Earthquake Research,CEA,Lanzhou 730000,China 2 Institute of Geology,China Earthquake Administration,Beijing 100029,China 3 Earthquake Administration of Yunnan Province,Kunming 650224,China;Electromagnetic anomaly before the Yingjiang MS5.8 and Myanmar MS7.2 earthquakes[J];Chinese Journal of Geophysics;2013-05
2 Huang Ya-Ping;Geng Jian-Hua;Guo Tong-Lou;The School of Resource and Geosciences,China University of Mining and Technology;State Key Laboratory of Marine Geology,School of Ocean and Earth science,Tongji University;Exploration Branch Company of China Petroleum and Chemical Corporation;;New seismic attribute:Fractal scaling exponent based on gray detrended fluctuation analysis[J];应用地球物理(英文版);2015-03
【Secondary Citations】
Chinese Journal Full-text Database 4 Hits
1 DU Ai-Min 1,2 ZHOU Zhi-Jian3 XU Wen-Yao1 YANG Shao-Feng1 1 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2 Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085, China 3 Institute of Mathematics and Physics, China Agriculture University, Beijing 100083, China;GENERATION MECHANISMS OF ULF ELECTROMAGNETIC EMISSIONS BEFORE THE M_L7.1 EARTHQUAKE AT HOTAN OF XINJIANG[J];Chinese Journal of Geophysics;2004-05
2 HUANG Qing-Hua,LIU TaoDepartment of Geophysics,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Earthquakes and tide response of geoelectric potential field at the Niijima station[J];Chinese Journal of Geophysics;2006-06
3 HUANG Qing-Hua,LIN Yu-Feng Department of Geophysics,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Numerical simulation of selectivity of seismic electric signal and its possible influences[J];Chinese Journal of Geophysics;2010-03
4 Guoze Zhao Yan Zhan Lifeng Wang Jijun Wang Ji Tang Qibin Xiao and Xiaobin Chen Institute of Geology,China Earthquake Administration,Beijing 100029,China;Electromagnetic anomaly before earthquakes measured by electromagnetic experiments[J];地震学报(英文版);2009-04
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