Physics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95..119g&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Jan. 1, 1990, p. 119-137.
Physics
18
Earth Magnetosphere, Magnetic Storms, Magnetosphere-Ionosphere Coupling, Particle Interactions, Wave Interaction, Cosmic Noise, Daytime, Electron Precipitation, Extremely Low Frequencies, Very Low Frequencies
Scientific paper
Results are presented on a study that used ground-based observations at three Antarctic stations (South Pole, Siple, and Palmer) to quantitatively characterize changes in ELF-VLF wave activity and ionospheric absorption associated with sudden commencements. Changes in ELF-VLF wave activity at these high-latitude stations were observed in 50-60 percent of total events studied and for about 80 percent of the events when the observing station was on the dayside. It was observed that, in a significant number of cases, measurable particle precipitation inferred from the cosmic noise signal absorption began simultaneously to within 5 sec of the wave growth onset, suggesting that at least a part of the observed precipitation resulted from wave-induced scattering.
Carpenter Donald L.
Gail William B.
Helliwell Robert A.
Inan Umran S.
Krishnaswamy S.
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