Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ge%26ae..50..320l&link_type=abstract
Geomagnetism and Aeronomy, Volume 50, Issue 3, pp.320-328
Physics
Scientific paper
The complex geophysical pattern of the development of geomagnetic storm in VLF emissions has been studied based on the satellite data. It has been established that the variations in the LF noise emission intensity (0.1-20.0 kHz) and the energetic electron ( E ≥ 40 keV) flux density reflect the processes of magnetospheric plasma reconstruction during geomagnetic disturbances. It has been indicated that a distinct structure of the inner and outer radiation belts is observed under quiet conditions, and the VLF emission maximum was registered at L = 4-5. The inner boundary of the outer radiation belt shifted to lower latitudes, the intensity of the noise VLF emissions increased, and the intensity maximum was displaced to L = 2.5-3.5 during the geomagnetic storm, when the energetic electron flux density increased. The VLF noise spectrum widened toward higher frequencies. The VLF noise level continued increasing, the noise maximum shifted to L = 4-5, and the fluxes of precipitating electrons abruptly increased during the storm recovery phase, when the density of the flux of quasitrapped electrons remained increased for a long time.
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