Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003

	Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003
	Solovyev, SI ; Moiseyev, AV ; Mullayarov, VA ; Du, A ; Engebretson, M ; Newitt, L
刊名	COSMIC RESEARCH
	2004-11-01
卷号	42 期号:6 页码:597-606
ISSN号	0010-9525
文献子类	Article
英文摘要	We study the response of the ionosphere and magnetosphere to a sudden commencement (SC) on October 29, 2003, at 06:11 UT. It is shown that the geomagnetic response had the form of two successive stages. In the first similar to5 min after the SC, a strong intensification of a two-vortex current system of the DP2 type was observed in latitudes similar to67degrees-65degrees, with variations of DeltaH -4000 nT (+700 nT). At the same time. energetic electrons were injected without dispersion to geosynchronous orbits simultaneously in the sectors similar to16, similar to04, and similar to07 MLT. In the subsequent 5-15 min, a new intensification of the western electrojet took place in all time sectors at latitudes similar to70degrees. Around midnight, this electrojet was extended in the poleward direction up to the polar cap latitudes (Phi' approximate to 7511-830). It had an unusually high velocity of extension (up to similar to5.0 km/s) and was accompanied by typical dispersionless substorm injections, but only at meridians similar to04, and 07 MLT. From comparing the development of electrojets with the data of satellite observations in the solar wind and magnetosphere. we suggest that similar to3-5 min after the SC onset a dipolization of the magnetic field at the geosynchronous orbit occurred. It was connected with the decay of the current flowing across the magnetotail. The subsequent extension of the region of current decay into the tail up to 150 R-E proceeded with a velocity of greater than or equal to1000 km/s, which exceeds the known velocities of such an extension by a factor of similar to5.
WOS关键词	SUBSTORMS ; DISTURBANCES
WOS研究方向	Engineering ; Astronomy & Astrophysics
语种	英语
出版者	MAIK NAUKA/INTERPERIODICA/SPRINGER
WOS记录号	WOS:000226394900007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/79541]
专题	中国科学院地质与地球物理研究所
通讯作者	Solovyev, SI
作者单位	1.Russian Acad Sci, Shafer Inst Cosmophys Res & Aeron, Siberian Div, Yakutsk, Russia 2.Inst Geol & Geophys, Beijing, Peoples R China 3.Augsburg Coll, Minneapolis, MN USA
推荐引用方式 GB/T 7714	Solovyev, SI,Moiseyev, AV,Mullayarov, VA,et al. Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003[J]. COSMIC RESEARCH,2004,42(6):597-606.
APA	Solovyev, SI,Moiseyev, AV,Mullayarov, VA,Du, A,Engebretson, M,&Newitt, L.(2004).Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003.COSMIC RESEARCH,42(6),597-606.
MLA	Solovyev, SI,et al."Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003".COSMIC RESEARCH 42.6(2004):597-606.