中美地磁总强度日变化的分析比较
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摘要: 利用中国京津地区13个台站、滇西地区3个台站以及美国加州6个台站的地磁总强度观测资料,分析比较了这些台站的地磁总强度日变化及其频谱.结果表明,地磁总强度日变化的形态、日变幅与频谱,在100-200km 的局部范围内基本相同,在500km 大范围则不同.在25-40纬度范围内,地磁总强度日变幅的纬度因子约为1-2nT/度.
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关键词:
- 地磁总强度 /
- 地磁日变化及其频谱 /
- 中国京津地区与滇西地区 /
- 美国加州
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[2] 周勋,1986.地磁仪器及其在震磁关系研究中的应用.宋守全、张洪由、毛桐恩、詹志佳编,国际震磁研究,92——100.科学技术文献出版社,北京.
[3] 詹志佳、林云芳,1985.中美地磁合作观测及其初步结果.中国地震年鉴1983,29—— 30.地震出版社,北京.
[4] Mueller, R, Johnston, M, Smith,B. and Keller, V.. 1981. U. S. Geological Survey magnetometer network and measurement technigues in western U. S. A. USGS Open——file Rep.,81——1346.
[5] Matsushita, S. and Campbell, W.(Editorsl,1967. Physic.c of Geomagnetic Phenomena, 302——503. Academic Press, New York and London.
[6] Johnston, M.,1987. Tectonomagnetism and tectonoelectricity. Rev. Geophy.,25, 983——988.
[7] Johnston, M.,1989. Review of magnetic and electric field effects near active faults and volcanoes in the U. S. A. Phys. Earth Planet. Inter,57, 47——63.
[8] Rikitake, T.,Honkura, Y.,Tanaka, H.,Ohshiman, N.,Sasai, Y.. Ishikawa, Y,Koyama, S.,Kawamura, M. and Ohchi. K.,1980. Changes in the geomagnetic field associated with earthquakes in
[9] the Izu Penisula, Japan. J. Geomag. Geoeleclr.,32, 721——739.
[10] Shapiro,V.and Abdullabekov,K., 1982. Anomalous variations ofthe geomagnetic field in East Fergaka——magnetic precursor of the Alay earthquake with M=7.0(1978 November 2). Geopirys. J. R. astr..Soc, 68, 1——5.
[11] Zhan, Z. J.,1989. Investigations of tectonomagnetic phenomena m China. Phys.Earth Planet.Inter.,57, 11——22.
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