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

TitleRelativistic electron microbursts and variations in trapped MeV electron fluxes during the 8-9 October 2012 storm: SAMPEX and Van Allen Probes observations
Publication TypeJournal Article
Year of Publication2016
AuthorsKurita, S, Miyoshi, Y, J. Blake, B, Reeves, GD, Kletzing, CA
JournalGeophysical Research Letters
Paginationn/a - n/a
Date Published02/2016
KeywordsRadiation belts; relativistic electron microbursts; relativistic electrons; SAMPEX; Van Allen Probes; whistler mode chorus
AbstractIt 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.
URLhttp://doi.wiley.com/10.1002/2016GL068260http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2016GL068260
DOI10.1002/2016GL068260
Short TitleGeophys. Res. Lett.


Page Last Modified: April 20, 2016