Morphology and possible mechanism of the generation of emissions at a frequency of about 0.25 Hz

Details Morphology and possible mechanism of the generation of emissions at a frequency of about 0.25 Hz Morphology and possible mechanism of the generation of emissions at a frequency of about 0.25 Hz

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ge%26ae..30..960m&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 30, Nov.-Dec. 1990, p. 960-964. In Russian.

Physics

Auroras, Earth Magnetosphere, Magnetohydrodynamic Waves, Radiation Sources, Vlf Emission Recorders, Geomagnetism, Ions, Polar Substorms, Polarization (Waves)

Scientific paper

Quasi-monochromatic emissions at 0.25 Hz have been recorded during the recovery phase of weak and moderate (AE less than 500 nTl) substorms in the morning sector of the magnetosphere and found to be associated with ion-flux increases. The limited spatial dimensions of the ground projection of the source and the polarization characteristics of the oscillations lead to the conclusion that the generation mechanism of these emissions may be the excitation of the Alfven waveguide in high-latitude ducts by fluxes of high-energy ions.

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