Analyses of Geomagnetic Field and Its Secular Variation over mas-microsoft-com:office:smarttags" />China
详细信息
- 责任者：Chen Bin (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Gu Zuowen
- 刊名：Chinese Journal of Geophysics
- 出版年：2011
- 卷期：54（3）
- 关键词：地磁场 ; geomagnetic field ; 中国 ; China
- 页码：p.771-779
- 图表：4 illus., 4 tables, 15 refs.
- 分类号：0400
- 出版序号：20120053
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In this paper, the authors used the Spherical Cap Harmonic (SCH) method to calculate the geomagnetic data at 1 119 sites and 36 observatories in China on 2005.0 epoch, and obtained the normal and abnormal geomagnetic spatial structure in China and built an SCH model for geomagnetic secular variation in China for 2005~2010 epoch. The results showed that the error of geomagnetic field by IGRF could be 5’ for declination and inclination and 100 nT for total intensity. By using better resolution and newer geomagnetic data, the geomagnetic chart on 2005. 0 epoch using SCH method should be better to describe the spatial structure of geomagnetic field. This method should be used in compiling Geomagnetic Chart for China stably.