Long-period hydromagnetic waves at very high geomagnetic latitudes

被引:28
作者
Lanzerotti, LJ [1 ]
Shono, A
Fukunishi, H
Maclennan, CG
机构
[1] Tohoku Univ, Dept Geophys & Astron, Sendai, Miyagi 9808578, Japan
[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
关键词
D O I
10.1029/1999JA900325
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Low-frequency (similar to 5 mHz) geomagnetic fluctuations are investigated at Antarctic ground-based locations ranging from similar to 71 degrees to similar to 80 degrees geomagnetic latitude, and in the northern conjugate region. We show that a narrow band spectral feature at about this frequency often appears in the data, especially at the lower latitudes. We conclude that the demarcation in latitude between the appearance or not of the spectral tone indicates the location of the magnetopause, and that the similar to 5 mHz frequency is the frequency of standing Alfven waves on the last closed magnetosphere field lines.
引用
收藏
页码:28423 / 28435
页数:13
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