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《Chinese Journal of Geophysics》 2013-03
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The method of geomagnetic diurnal correction to vector geomagnetic data by virtual diurnal variation station

GU Chun-Lei1,2,ZHANG Yi2,XU Ru-Gang2,YUAN Jie-Hao3,WANG Lei2,ZHU Zhi-Chun2 1 College of Earth and Space Science,University of Science and Technology of China,Hefei 230026,China 2 Earthquake Administration of Anhui Province,Hefei 230031,China 3 Institute geophysics,China Earthquake Administration,Beijing 100081,China  
Mobile vector seism magnetic survey is a kind of method to obtain seismic precursor,experimentation and survey proved,the value of geomagnetic anomalies is small which caused by earthquake preparation,so we should as far as possible to elimination errors of data processing.The aim of this paper is to discuss the diurnal correction precision of vector geomagnetic data.First we used the inverse distance weighted interpolation method to obtain the virtual data of Mengcheng by observed data form Tai′an,Wuhan,Chongming and Hangzhou geomagnetic observatories,and the correlation coefficients of declination,horizontal and vertical components are 0.9987,0.9946 and 0.9806 respectively between virtual and observed data.The result verifies that this method is effective to spatial interpolation of geomagnetic.Then we calculated the virtual diurnal variation data of vector geomagnetic points by inverse distance weighted interpolation method,and used to correct diurnal correction to vector geomagnetic points of eastern and western of monitoring area.This method can effectively improve the diurnal correction precision,and have more practical application value to geomagnetic observatory scarce area.
【Fund】: 地震行业科研专项《中国综合地球物理场观测——青藏高原东缘地区第4、6专题》(200908029-04);; 2010.0年代中国地磁图编制(2008FY220100)项目资助
【CateGory Index】: P318
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