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Large geomagnetic storms of extreme solar event periods in solar cycle 23

文献类型：期刊论文

作者Wang RG(王瑞光); Wang, RG
刊名ADVANCES IN SPACE RESEARCH
出版日期2007
卷号40期号:12页码:1835-1841
关键词geomagnetic storms ground level enhancements coronal mass ejections solar wind plasma cosmic ray decreases
通讯作者[Wang, Ruiguang] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China ; [Wang, Ruiguang] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
英文摘要During extreme solar events such as big flares or/and energetic coronal mass ejections (CMEs) high energy particles are accelerated by the shocks formed in front of fast interplanetary coronal mass ejections (ICMEs). The ICMEs (and their sheaths) also give rise to large geomagnetic storms which have significant effects on the Earth's environment and human life. Around 14 solar cosmic ray ground level enhancement (GLE) events in solar cycle 23 we examined the cosmic ray variation, solar wind speed, ions density, interplanetary magnetic field, and geomagnetic disturbance storm time index (D-st). We found that all but one of GLEs are always followed by a geomagnetic storm with D-st <= -50 nT within 1-5 days later. Most(10/14) geomagnetic storms have D-st index < -100 nT therefore generally belong to strong geomagnetic storms. This suggests that GLE event prediction of geomagnetic storms is 93% for moderate storms and 71% for large storms when geomagnetic storms preceded by GLEs. All D-st depressions are associated with cosmic ray decreases which occur nearly simultaneously with geomagnetic storms. We also investigated the interplanetary plasma features. Most geomagnetic storm correspond significant periods of southward B-z and in close to 80% of the cases that the B-z was first northward then turning southward after storm sudden commencement (SSC). Plasma flow speed, ion number density and interplanetary plasma temperature near 1 AU also have a peak at interplanetary shock arrival. Solar cause and energetic particle signatures of large geomagnetic storms and a possible prediction scheme are discussed. (c) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.
学科主题Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
类目[WOS]Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
原文出处SCI
语种英语
WOS记录号WOS:000253590300009
源URL[http://ir.ihep.ac.cn/handle/311005/239546]  
专题高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 Wang RG,Wang, RG. Large geomagnetic storms of extreme solar event periods in solar cycle 23[J]. ADVANCES IN SPACE RESEARCH,2007,40(12):1835-1841.
APA 王瑞光,&Wang, RG.(2007).Large geomagnetic storms of extreme solar event periods in solar cycle 23.ADVANCES IN SPACE RESEARCH,40(12),1835-1841.
MLA 王瑞光,et al."Large geomagnetic storms of extreme solar event periods in solar cycle 23".ADVANCES IN SPACE RESEARCH 40.12(2007):1835-1841.

入库方式： OAI收割

来源：高能物理研究所

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