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

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7]; ORCiD logo [8]
+ Show Author Affiliations
  1. Peking Univ., Beijing (China). Inst. of Space Physics and Applied Technology
  2. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics
  3. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Geology and Geophysics
  4. Johns Hopkins Univ., Baltimore, MD (United States). Applied Physics Lab.
  5. Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics Inst. for Earth Oceans and Space
  6. Aerospace Corporation, Los Angeles, CA (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Space and Atmospheric Sciences Group
  8. Univ. of Colorado, Boulder, CO (United States). Lab for Atmospheric and Space Physics
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE; National Aeronautics and Space Administration (NASA)
OSTI Identifier:
1402595
Report Number(s):
LA-UR-15-28227
Journal ID: ISSN 0094-8276; TRN: US1702873
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 43; Journal Issue: 11; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Heliospheric and Magnetospheric Physics

Citation Formats

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., and Reeves, G. D. Electron dropout echoes induced by interplanetary shock: Van Allen Probes observations. United States: N. p., 2016. Web. doi:10.1002/2016GL069140.
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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. Electron dropout echoes induced by interplanetary shock: Van Allen Probes observations. United States. https://doi.org/10.1002/2016GL069140
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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., and Reeves, G. D. Tue . "Electron dropout echoes induced by interplanetary shock: Van Allen Probes observations". United States. https://doi.org/10.1002/2016GL069140. https://www.osti.gov/servlets/purl/1402595.
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@article{osti_1402595,
title = {Electron dropout echoes induced by interplanetary shock: Van Allen Probes observations},
author = {Hao, Y. X. and Zong, Q. -G. and Zhou, X. -Z. and Fu, S. Y. and Rankin, R. and Yuan, C. -J. and Lui, A. T. Y. and Spence, H. E. and Blake, J. B. and Baker, D. N. and Reeves, G. D.},
abstractNote = {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.},
doi = {10.1002/2016GL069140},
journal = {Geophysical Research Letters},
number = 11,
volume = 43,
place = {United States},
year = {Tue Jun 07 00:00:00 EDT 2016},
month = {Tue Jun 07 00:00:00 EDT 2016}
}
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https://doi.org/10.1002/2016GL069140
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    Works referencing / citing this record:

    Drift‐Dispersed Flux Dropouts of Energetic Electrons Observed in Earth's Middle Magnetosphere by the Magnetospheric Multiscale (MMS) Mission
    journal, March 2019

    • Cohen, Ian J.; Mauk, Barry H.; Turner, Drew L.
    • Geophysical Research Letters, Vol. 46, Issue 6
    • DOI: 10.1029/2019gl082008

    Understanding Electron Dropout Echoes Induced by Interplanetary Shocks: Test Particle Simulations
    journal, August 2019

    • Liu, Y.; Zong, Q. ‐G.; Zhou, X. ‐Z.
    • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 8
    • DOI: 10.1029/2019ja027018

    Drifting Electron Holes Occurring During Geomagnetically Quiet Times: BD‐IES Observations
    journal, November 2019

    • Liu, Z. ‐Y.; Zong, Q. ‐G.; Zou, H.
    • Journal of Geophysical Research: Space Physics, Vol. 124, Issue 11
    • DOI: 10.1029/2019ja027194
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