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[1]WANG Zhendong,GU Zuowen,CHEN Bin,et al.Geomagnetic Secular Variation in China Described by CHAOS-6 Model and its Error Analysis[J].Journal of Seismological Research,2017,40(03):404-410.

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Geomagnetic Secular Variation in China Described by CHAOS-6 Model and its Error Analysis

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 03 Page number: 404-410 Column: 流动地磁专栏 Public date: 2017-07-23

Title:: Geomagnetic Secular Variation in China Described by CHAOS-6 Model and its Error Analysis

Author(s):: WANG Zhendong; GU Zuowen; CHEN Bin; WANG Can; YUAN Jiehao; (Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

Keywords:: CHAOS model; geomagnetic annual variations; geomagnetic secular variations; geomagnetic stations

CLC:: P318

DOI:: -

Abstract:: According to the CHAOS-6 model,the annual changes of geomagnetic at 28 observations located in China in 2015 and the geomagnetic secular variations at CDP,GLM,LZH,TAA and THJ observations in 2008.0—2016.5 were calculated.The differences between the geomagnetic data of practical observations and those calculated by the CHAOS-6 model were analyzed.The mean differences and the mean square root σ were obtained.The results show that the trend of the geomagnetic secular variation in China described by the CHAOS-6 model is basically consistent with those at observations,but there are some differences.The mean of the difference and the mean square root are -0.9'/1.7' and -29.3'/0.8' for geomagnetic declination(D)and inclination(I)respectively; and the mean of the difference and the mean square root are -116.3 nT/10.2 nT,264.7 nT/13.6 nT,-27.7 nT/15.0 nT,265.2 nT/13.7 nT and -356.9 nT/8.0 nT for total intensity(F),northern component(X),eastern component(Y),horizontal component(H)and vertical component(Z),respectively at 28 observations.The main reason for the error of the geomagnetic secular variation in China described by the CHAOS-6 model is that the regional and local magnetic anomalies in China,while the CHAOS-6 is a model of global geomagnetic field.The error of the CHAOS-6 model should be fully considered when we use it to study the regional problems in China.

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Last Update: 2017-07-20