| Sq内外源电流体系中国地区变化特征 |
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| 引用本文： | 刘晓灿,陈化然,赵旭东,于培青,杨军,王秋军,罗开奇,胡秀娟.Sq内外源电流体系中国地区变化特征[J].地球物理学报,2014,57(11):3789-3794. |
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| 作者姓名： | 刘晓灿 陈化然 赵旭东 于培青 杨军 王秋军 罗开奇 胡秀娟 |
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| 作者单位： | 1. 中国地震局地球物理研究所, 北京 100081;2. 福建省地震局, 福州 350003;3. 云南省地震局, 大理 671000;4. 石家庄经济学院, 石家庄 050031;5. 福建省地震局泉州基准地震台, 泉州 362000;6. 河北省地震局红山基准台, 隆尧 055350 |
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| 基金项目： | 中央级公益性科研院所基本科研业务专项(DQJB12B22)、国家自然科学基金(41204121)、国家重大科学仪器设备开发专项(2014YQ100817)资助. |
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| 摘 要： | 利用球冠谐分析法对2009年我国35个绝对观测地磁台站的Sq太阳静日变化进行内外源场分离,反演得到三个劳埃德季节(冬季D,分点E,夏季J)相应的内、外源等效电流体系,结果表明Sq外源电流体系在该区域D、E、J三个季节的电流涡中心强度分别为56.2 kA、137.7 kA、137.9 kA,电流涡中心位置的地方时由冬季的1124LT前移至夏季的约1030LT;Sq内源电流体系在该区域D、E、J三个季节的电流涡中心强度分别为21.1 kA、63.4 kA、72.7 kA,电流涡中心位置的地方时由冬季的1100LT前移至夏季的约1000LT.
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| 关 键 词： | Sq内外源 等效电流体系 球冠谐分析法 季节变化 |
| 收稿时间： | 2013-10-24 |
Characteristics of inner and external geomagnetic Sq current system in China |
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| LIU Xiao-Can,CHEN Hua-Ran,ZHAO Xu-Dong,YU Pei-Qing,YANG Jun,WANG Qiu-Jun,LUO Kai-Qi,HU Xiu-Juan.Characteristics of inner and external geomagnetic Sq current system in China[J].Chinese Journal of Geophysics,2014,57(11):3789-3794. |
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| Authors: | LIU Xiao-Can CHEN Hua-Ran ZHAO Xu-Dong YU Pei-Qing YANG Jun WANG Qiu-Jun LUO Kai-Qi HU Xiu-Juan |
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| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;2. Earthquake Administration of Fujian Province, Fuzhou 350003, China;3. Earthquake Administration of Yunnan Province, Dali 671000, China;4. Shijiazhuang University of Economics, Shijiazhuang 050031, China;5. Quanzhou Fiducial Seismic Station of Fujian Province, Quanzhou 362000, China;6. Hongshan Fiducial Seismic Station of Hebei Province, Longyao 055350, China |
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| Abstract: | We calculated three-component Sq variations of 35 geomagnetic observatories for three geomagnetic seasons in China in 2009, and used spherical cap harmonic analyzing method to divide those Sq variations into inner and external two parts, then deduced their equivalent current system individually. We analyzed the seasonal characteristics of the two parts of geomagnetic current systems and obtained the following results. For external current system, in three Lioyd (D,E,J) seasons, respectively, the maximum intensity is 56.2 kA, 137.7 kA, 137.9 kA, and the LT of the current vortex is displaced from 1124LT to about 1030 LT. For inner current system, in D, E, J season, respectively, the maximum intensity is 21.1 kA, 63.4 kA, 72.7 kA, and the LT of the current vortex is displaced from 1100 LT to about 1000 LT. |
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| Keywords: | Sq variations inner and external sources Equivalent electric current system Spherical cap harmonic analyzing Seasonal variation |
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