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Title: Nonstorm time dropout of radiation belt electron fluxes on 24 September 2013

Journal Article · · Journal of Geophysical Research. Space Physics
DOI:https://doi.org/10.1002/2016JA022546· OSTI ID:1291235
 [1];  [1];  [2];  [3];  [4];  [4];  [1];  [1];  [1];  [5];  [6];  [7];  [8]
  1. Univ. of Science and Technology of China, Hefei (China)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); New Mexico Consortium, Los Alamos, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of California, Los Angeles, CA (United States)
  5. Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics
  6. Univ. of Colorado, Boulder, CO (United States)
  7. The Aerospace Corp., Los Angeles, CA (United States)
  8. Univ. of Minnesota, Minneapolis, MN (United States)

Radiation belt electron flux dropouts during the main phase of geomagnetic storms have received increasing attention in recent years. Here we focus on a rarely reported nonstorm time dropout event observed by Van Allen Probes on 24 September 2013. Within several hours, the radiation belt electron fluxes exhibited a significant (up to 2 orders of magnitude) depletion over a wide range of radial distances (L > 4.5), energies (~500 keV to several MeV) and equatorial pitch angles (0° ≤ αe ≤ 180°). STEERB simulations show that the relativistic electron loss in the region L = 4.5–6.0 was primarily caused by the pitch angle scattering of observed plasmaspheric hiss and electromagnetic ion cyclotron waves. Furthermore, our results emphasize the complexity of radiation belt dynamics and the importance of wave-driven precipitation loss even during nonstorm times.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1291235
Report Number(s):
LA-UR-16-23140
Journal Information:
Journal of Geophysical Research. Space Physics, Journal Name: Journal of Geophysical Research. Space Physics; ISSN 2169-9380
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Cited By (9)

Nonlinear fundamental and harmonic cyclotron resonant scattering of radiation belt ultrarelativistic electrons by oblique monochromatic EMIC waves journal February 2017
Contemporaneous EMIC and whistler mode waves: Observations and consequences for MeV electron loss: SIMULTANEOUS EMIC AND WHISTLER OBSERVATIONS journal August 2017
Shock‐Induced Disappearance and Subsequent Recovery of Plasmaspheric Hiss: Coordinated Observations of RBSP, THEMIS, and POES Satellites journal October 2017
Multipoint Observations of Nightside Plasmaspheric Hiss Generated by Substorm‐Injected Electrons journal October 2018
The Efficiency of Coronal Mass Ejection With Different IMF Preconditions on the Production of Megaelectronvolt Electron Content in the Outer Radiation Belt journal May 2019
Energetic Electron Precipitation: Multievent Analysis of Its Spatial Extent During EMIC Wave Activity journal April 2019
Direct Observation of Subrelativistic Electron Precipitation Potentially Driven by EMIC Waves journal November 2019
Impact of Significant Time‐Integrated Geomagnetic Activity on 2‐MeV Electron Flux journal June 2019
Propagation of EMIC Waves Inside the Plasmasphere: A Two‐Event Study journal November 2019

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