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

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2016GL069140· OSTI ID:1402595
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8]
  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
+ Show Author Affiliations
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.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautic and Space Administration (NASA); USDOE
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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Cited By (5)

Relativistic electron dynamics produced by azimuthally localized poloidal mode ULF waves: Boomerang-shaped pitch angle evolutions: ULF BOOMERANG journal August 2017
Global‐Scale ULF Waves Associated With SSC Accelerate Magnetospheric Ultrarelativistic Electrons journal March 2019
Drift‐Dispersed Flux Dropouts of Energetic Electrons Observed in Earth's Middle Magnetosphere by the Magnetospheric Multiscale (MMS) Mission journal March 2019
Understanding Electron Dropout Echoes Induced by Interplanetary Shocks: Test Particle Simulations journal August 2019
Drifting Electron Holes Occurring During Geomagnetically Quiet Times: BD‐IES Observations journal November 2019

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Related Subjects

58 GEOSCIENCES
Heliospheric and Magnetospheric Physics