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

Hao, Y. X.; Zong, Q. -G.; Zhou, X. -Z.; Fu, S. Y.; Rankin, R.; Yuan, C. -J.; Lui, A. T.  Y.; Spence, H. E.; Blake, J. B.; Baker, D. N.; Reeves, G. D.

doi:10.1002/2016GL069140

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

Journal Article · Tue Jun 07 00:00:00 EDT 2016 · Geophysical Research Letters

DOI:https://doi.org/10.1002/2016GL069140· OSTI ID:1402595

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]; ^[8]

Peking Univ., Beijing (China). Inst. of Space Physics and Applied Technology
Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Geology and Geophysics
Johns Hopkins Univ., Baltimore, MD (United States). Applied Physics Lab.
Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics Inst. for Earth Oceans and Space
Aerospace Corporation, Los Angeles, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Space and Atmospheric Sciences Group
Univ. of Colorado, Boulder, CO (United States). Lab for Atmospheric and Space Physics

On 23 November 2012, a sudden dropout of the relativistic electron flux was observed after an interplanetary shock arrival. The dropout peaks at ~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 ~1300 to 0100 LT. We then conclude that the shock-induced electron dropout is not caused by the magnetopause shadowing. Furthermore, 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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; National Aeronautic and Space Administration (NASA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1402595

Report Number(s):: LA-UR--15-28227

Journal Information:: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 11 Vol. 43; ISSN 0094-8276

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Drift‐Dispersed Flux Dropouts of Energetic Electrons Observed in Earth's Middle Magnetosphere by the Magnetospheric Multiscale (MMS) Mission Cohen, Ian J.; Mauk, Barry H.; Turner, Drew L. Geophysical Research Letters, Vol. 46, Issue 6 https://doi.org/10.1029/2019gl082008	journal	March 2019
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