Prompt energization of relativistic and highly relativistic electrons during a substorm interval: Van Allen Probes observations

被引：85
|
作者：
Foster, J. C. [1 ]
Erickson, P. J. [1 ]
Baker, D. N. [2 ]
Claudepierre, S. G. [3 ]
Kletzing, C. A. [4 ]
Kurth, W. [4 ]
Reeves, G. D. [5 ]
Thaller, S. A. [6 ]
Spence, H. E. [7 ]
Shprits, Y. Y. [8 ]
Wygant, J. R. [6 ]
机构：
[1] MIT, Haystack Observ, Atmospher Sci Grp, Westford, MA 01886 USA
[2] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA
[3] Aerosp Corp, Dept Space Sci, Los Angeles, CA 90009 USA
[4] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
[5] Los Alamos Natl Lab, Los Alamos, NM USA
[6] Univ Minnesota, Dept Phys & Astron, Minneapolis, MN USA
[7] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA
[8] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 01期
基金：
美国国家科学基金会;
关键词：
Relativistic Electrons; Substorm; Radiation Belts; Prompt Energizations; INNER MAGNETOSPHERE; ENERGETIC PARTICLE; RADIATION BELTS; ACCELERATION; TRANSPORT;
D O I：
10.1002/2013GL058438
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
On 17 March 2013, a large magnetic storm significantly depleted the multi-MeV radiation belt. We present multi-instrument observations from the Van Allen Probes spacecraft Radiation Belt Storm Probe A and Radiation Belt Storm Probe B at similar to 6Re in the midnight sector magnetosphere and from ground-based ionospheric sensors during a substorm dipolarization followed by rapid reenergization of multi-MeV electrons. A 50% increase in magnetic field magnitude occurred simultaneously with dramatic increases in 100keV electron fluxes and a 100 times increase in VLF wave intensity. The 100keV electrons and intense VLF waves provide a seed population and energy source for subsequent radiation belt enhancements. Highly relativistic (> 2MeV) electron fluxes increased immediately at L*similar to 4.5 and 4.5MeV flux increased > 90 times at L*=4 over 5h. Although plasmasphere expansion brings the enhanced radiation belt multi-MeV fluxes inside the plasmasphere several hours postsubstorm, we localize their prompt reenergization during the event to regions outside the plasmasphere.
引用
收藏
页码：20 / 25
页数：6
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