Observations of the impenetrable barrier, the plasmapause, and the VLF bubble during the 17 March 2015 storm

TitleObservations of the impenetrable barrier, the plasmapause, and the VLF bubble during the 17 March 2015 storm
Publication TypeJournal Article
Year of Publication2016
AuthorsFoster, JC, Erickson, PJ, Baker, DN, Jaynes, AN, Mishin, EV, Fennel, JF, Li, X, Henderson, MG, Kanekal, SG
JournalJournal of Geophysical Research: Space Physics
Volume121
Issue6
Pagination5537 - 5548
Date Published06/2016
Keywordsbarrier; Plasmapause; storm; Van Allen Probes; VLF
AbstractVan Allen Probes observations during the 17 March 2015 major geomagnetic storm strongly suggest that VLF transmitter-induced waves play an important role in sculpting the earthward extent of outer zone MeV electrons. A magnetically confined bubble of very low frequency (VLF) wave emissions of terrestrial, human-produced origin surrounds the Earth. The outer limit of the VLF bubble closely matches the position of an apparent barrier to the inward extent of multi-MeV radiation belt electrons near 2.8 Earth radii. When the VLF transmitter signals extend beyond the eroded plasmapause, electron loss processes set up near the outer extent of the VLF bubble create an earthward limit to the region of local acceleration near Lā€‰=ā€‰2.8 as MeV electrons are scattered into the atmospheric loss cone.
URLhttp://doi.wiley.com/10.1002/2016JA022509
DOI10.1002/jgra.v121.610.1002/2016JA022509
Short TitleJ. Geophys. Res. Space Physics


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