Electron dropout echoes induced by interplanetary shock: Van Allen Probes observations

被引：26

作者：

Hao, Y. X. ^{[1
]}

Zong, Q. -G. ^{[1
]}

Zhou, X. -Z. ^{[1
]}

Fu, S. Y. ^{[1
]}

Rankin, R. ^{[2
]}

Yuan, C. -J. ^{[3
]}

Lui, A. T. Y. ^{[4
]}

Spence, H. E. ^{[5
]}

Blake, J. B. ^{[6
]}

Baker, D. N. ^{[7
]}

Reeves, G. D. ^{[8
]}

机构：

[1] Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China

[2] Univ Alberta, Dept Phys, Edmonton, AB, Canada

[3] Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China

[4] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[5] Univ New Hampshire, Dept Phys, Inst Earth Oceans & Space, Durham, NH 03824 USA

[6] Aerosp Corp, POB 92957, Los Angeles, CA 90009 USA

[7] Los Alamos Natl Lab, Space & Atmospher Sci Grp, Los Alamos, NM USA

[8] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 11期

基金：

中国国家自然科学基金;

关键词：

electron dropout echo; energetic particle; solar wind-magnetospheric coupling; interplanetary shock; magnetopause shadowing; drift shell splitting; ENERGETIC PARTICLE; GEOSYNCHRONOUS ORBIT; INNER MAGNETOSPHERE; FLUX; INJECTIONS; PROTONS; PLASMA;

D O I：

10.1002/2016GL069140

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

On 23 November 2012, a sudden dropout of the relativistic electron flux was observed after an interplanetary shock arrival. The dropout peaks at approximate to 1 MeV and more than 80% of the electrons disappeared from the drift shell. Van Allen twin Probes observed a sharp electron flux dropout with clear energy dispersion signals. The repeating flux dropout and recovery signatures, or dropout echoes, constitute a new phenomenon referred to as a drifting electron dropout with a limited initial spatial range. The azimuthal range of the dropout is estimated to be on the duskside, from approximate to 1300 to 0100 LT. We conclude that the shock-induced electron dropout is not caused by the magnetopause shadowing. The dropout and consequent echoes suggest that the radial migration of relativistic electrons is induced by the strong dusk-dawn asymmetric interplanetary shock compression on the magnetosphere.

引用

页码：5597 / 5605

页数：9

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