Characteristics of the global geomagnetic response to quasi-periodic variations in the solar wind dynamic pressure

被引：0
|
作者：
Solovyev, SI
Moiseyev, AV
Baishev, DG
Makarov, GA
Yumoto, K
Engebretson, M
机构：
[1] Russian Acad Sci, Siberian Div, Inst Cosmophys Res & Aeron, Yakutsk 677007, Russia
[2] Kyushu Univ, Higashi Ku, Fukuoka 8128581, Japan
[3] Augsburg Coll, Minneapolis, MN 55454 USA
来源：
GEOMAGNETISM AND AERONOMY | 2003年 / 43卷 / 02期
关键词：
D O I：
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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：
It has been shown that the geomagnetic response to the solar wind dynamic pressure variations with T = 8-12 min, shown in the global generation of geomagnetic pulsations with similar periods T, has two different modes of oscillations. The first mode is recorded in antiphase relative to the noon meridian and is observed from equatorial to high latitudes. The second mode of oscillations is excited at latitudes of greater than or equal to73degrees-75degrees and does not change its phase relative to the noon meridian in the region extending over similar to7 MLT in longitude. The region of generation of the second-mode pulsations shifts poleward at a velocity of similar to2-3 km/s. It is assumed that the first mode of the oscillations results from the modulation of the intensity of the large-scale two-vortex current system and the second mode is caused by the generation of jet ionospheric currents closed at the dayside magnetosphere by field-aligned currents of zone 1.
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页码：172 / 180
页数：9
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