Physics
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.1558c&link_type=abstract
Journal of Geophysical Research, vol. 83, Apr. 1, 1978, p. 1558-1564.
Physics
5
Dynamo Theory, Electric Fields, Plasmapause, Radar Measurement, Whistlers, Atmospheric Electricity, Diurnal Variations, Earth Magnetosphere
Scientific paper
New information is provided on the origin of quiet-day drifts in the plasmasphere and on the noontime plasmaspheric bulge that appears to develop as a result of the drifts. A whistler path drift analysis is made of four successive 24-hr periods of magnetic quiet. The results confirm earlier findings and extend them by revealing new evidence of a decrease with increasing equatorial distance in the east-west magnetospheric electric field near L = 4. Additional evidence is provided for a secondary maximum in plasmapause radius near noon, apparently the phenomenon reported by Gringauz and Bezrukikh (1976). The observed electric fields originate at middle to low latitudes, apparently in an ionospheric dynamo process, and the noon bulge (noon-midnight asymmetry) of the plasmasphere is apparently due to the quiet-day flow pattern.
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