Observations of relativistic electron precipitation from the radiation belts driven by EMIC waves

Rodger, C.J.; Raita, T.; Clilverd, M.A. ORCID: https://orcid.org/0000-0002-7388-1529; Seppala, A.; Dietrich, S.; Thomson, N.R.; Ulich, T.. 2008 Observations of relativistic electron precipitation from the radiation belts driven by EMIC waves. Geophysical Research Letters, 35 (16), L16106. 5, pp. 10.1029/2008GL034804

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Abstract/Summary

For some time theoretical modeling has shown that electromagnetic ion cyclotron (EMIC) waves should play an important role in the loss of relativistic electrons from the radiation belts, through precipitation into the atmosphere. Up to now there has been limited experimental evidence for relativistic electron precipitation driven by EMIC waves. In this paper we present case studies of events showing EMIC waves, observed by ground-based pulsation magnetometers, which are linked to strong responses in a subionospheric precipitation monitor. This response is consistent with precipitation occurring near the plasmapause, where EMIC waves may resonate with relativistic electrons. At the same time there is only a weak response in a co-located riometer chain, as expected for relativistic electron precipitation that penetrates deeply into the atmosphere.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2008GL034804
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections
ISSN:	00948276
NORA Subject Terms:	Atmospheric Sciences
Date made live:	10 Aug 2010 13:19 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/10322

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