Relativistic electron microbursts and variations in trapped MeV electron fluxes during the 8-9 October 2012 storm: SAMPEX and Van Allen Probes observations

Kurita, Satoshi; Miyoshi, Yoshizumi; Blake, J. Bernard; Reeves, Geoffery D.; Kletzing, Craig A.

doi:10.1002/2016GL068260

Relativistic electron microbursts and variations in trapped MeV electron fluxes during the 8-9 October 2012 storm: SAMPEX and Van Allen Probes observations

Journal Article · Sun Mar 06 00:00:00 EST 2016 · Geophysical Research Letters

DOI:https://doi.org/10.1002/2016GL068260· OSTI ID:1402605

Kurita, Satoshi ^[1]; Miyoshi, Yoshizumi ^[1]; Blake, J. Bernard ^[2]; ^[3]; Kletzing, Craig A. ^[4]

Nagoya Univ. (Japan). Inst. for Space-Earth Environmental Research
Aerospace Corporation, El Segundo, CA (United States). Space Sciences Dept.
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy

It has been suggested that whistler mode chorus is responsible for both acceleration of MeV electrons and relativistic electron microbursts through resonant wave-particle interactions. Relativistic electron microbursts have been considered as an important loss mechanism of radiation belt electrons. Here in this paper we report on the observations of relativistic electron microbursts and flux variations of trapped MeV electrons during the 8–9 October 2012 storm, using the SAMPEX and Van Allen Probes satellites. Observations by the satellites show that relativistic electron microbursts correlate well with the rapid enhancement of trapped MeV electron fluxes by chorus wave-particle interactions, indicating that acceleration by chorus is much more efficient than losses by microbursts during the storm. It is also revealed that the strong chorus wave activity without relativistic electron microbursts does not lead to significant flux variations of relativistic electrons. Thus, effective acceleration of relativistic electrons is caused by chorus that can cause relativistic electron microbursts.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: International Space Science Institute (ISSI); Japan Society for the Promotion of Science (JSPS); National Aeronautic and Space Administration (NASA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1402605

Report Number(s):: LA-UR-16-20487

Journal Information:: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 7 Vol. 43; ISSN 0094-8276

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Response of Relativistic Electron Microbursts to the Arrival of High-Speed Solar Wind Streams and its Relation to Flux Variation of Trapped Radiation Belt Electrons Kurita, S.; Miyoshi, Y.; Blake, J. B. Journal of Geophysical Research: Space Physics, Vol. 123, Issue 9 https://doi.org/10.1029/2018ja025675	journal	September 2018
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Relativistic electron microbursts and variations in trapped MeV electron fluxes during the 8-9 October 2012 storm: SAMPEX and Van Allen Probes observations

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