Lightning-associated precipitation of MeV electrons from the inner radiation belt

Details Lightning-associated precipitation of MeV electrons from the inner radiation belt Lightning-associated precipitation of MeV electrons from the inner radiation belt

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15..172i&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, Feb. 1988, p. 172-175.

Physics

43

Electron Precipitation, High Energy Electrons, Inner Radiation Belt, Ionospheric Propagation, Lightning, Atmospheric Ionization, Signal Distortion

Scientific paper

This paper presents the first evidence of lightning-associated precipitation of electrons with energies above 1 MeV out of the inner radiation belt at L = 1.8 or less. The evidence consists of the observation of characteristic VLF signal perturbations on a subionospheric signal path that lies entirely on L = 1.8 or less. That the electron energies involved are in the MeV range is inferred from (1) the fact that gyroresonant electron energies for typical whistler wave frequencies are in the MeV range for L = 1.8 or less, and (2) the unusually rapid initial recovery exhibited by the observed perturbations, which is attributed to the relatively short effective loss rate for excess ionization at 40-70 km altitudes penetrated by the MeV electrons.

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