Observation of a double-onset substorm during northward interplanetary magnetic field

被引：2

作者：

Liu, Jun-Ming ^{[1
,2
]}

Zhang, Bei-Chen ^{[1
]}

Kamide, Y. ^{[1
]}

Wu, Zhen-Sen ^{[2
]}

Hu, Ze-Jun ^{[1
]}

Yang, Hui-Gen ^{[1
]}

机构：

[1] Polar Res Inst China, SOA Key Lab Polar Sci, Shanghai 200136, Peoples R China

[2] Xidian Univ, Sch Sci, Xian 710071, Peoples R China

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2010年 / 72卷 / 11-12期

基金：

中国国家自然科学基金;

关键词：

Substorm; Interplanetary magnetic field; Double-onset; Auroral breakup;

D O I：

10.1016/j.jastp.2010.04.010

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：

For the first time, a substorm event with double onsets is shown observationally under northward IMF condition in this study. Magnetic field data from ground stations and from geosynchronous satellite, and aurora data from IMAGE satellite are examined to study the substorm activity. The results show that the intensity and the spatial extent of the event are as large as those of typical substorms. Another interesting finding is that two expansion onsets seem to occur during the event. A possible mechanism for the two onsets was proposed. The energy source for the event was also discussed. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：864 / 868

页数：5

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