Journal article
Relativistic electron microbursts and variations in trapped MeV electron fluxes during the 8–9 October 2012 storm: SAMPEX and Van Allen Probes observations
Geophysical research letters, Vol.43(7), pp.3017-3025
04/16/2016
DOI: 10.1002/2016GL068260
Abstract
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 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.
Key Points
Balance between MeV electron acceleration and loss by chorus is investigated
Microburst precipitations well coincides with large increase in MeV electron fluxes
MeV electron acceleration by chorus is much efficient than microburst losses
Details
- Title: Subtitle
- Relativistic electron microbursts and variations in trapped MeV electron fluxes during the 8–9 October 2012 storm: SAMPEX and Van Allen Probes observations
- Creators
- Satoshi Kurita - Nagoya UniversityYoshizumi Miyoshi - Nagoya UniversityJ. Bernard Blake - The Aerospace CorporationGeoffery D Reeves - Los Alamos National LaboratoryCraig A Kletzing - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.43(7), pp.3017-3025
- DOI
- 10.1002/2016GL068260
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Number of pages
- 9
- Grant note
- JSPS (G2602) International Space Science Institute's (ISSI) Japan Society for the Promotion of Science (JSPS) (25302006; 14J09407; 15H05747; 15H05815)
- Language
- English
- Date published
- 04/16/2016
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199942302771
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