Estimation of storm-time level of day-side wave geomagnetic activity using a new ULF index

被引:10
作者
Kozyreva, O. V. [1 ]
Kleimenova, N. G. [1 ]
机构
[1] Russian Acad Sci, Inst Phys Earth, Moscow 123810, Russia
关键词
D O I
10.1134/S0016793208040099
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The level of wave geomagnetic activity in the morning and daytime sectors of auroral latitudes during strong magnetic storms with Dst(min) varying from -100 to -150 nT in 1995-2002 have been studied using a new ULF index of wave activity proposed in [Kozyreva et al., 2007]. It has been detected that daytime Pc5 pulsations (2-6 mHz) are most intense during the main phase of a magnetic storm rather than during the recovery phase as was considered previously. It has been indicated that morning geomagnetic pulsations during the substorm recovery phase mainly contribute to daytime wave activity. The appearance of individual intervals with the southward IMF B-z component during the magnetic storm recovery phase results in increases in the ULF index values.
引用
收藏
页码:491 / 498
页数:8
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