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
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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. |
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