Computer Science – Sound
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.2525l&link_type=abstract
Journal of Geophysical Research, vol. 83, June 1, 1978, p. 2525-2532.
Computer Science
Sound
2
Extremely Low Radio Frequencies, Ionospheric Conductivity, Magnetic Variations, Polar Substorms, Balloon Sounding, Correlation, Cosmic Noise, Earth Magnetosphere, Magnetic Fields, Northern Hemisphere, Riometers, Southern Hemisphere
Scientific paper
Correlation coefficients were calculated for the relation between variations in the cosmic noise absorption by the ionosphere and variations in magnetic field in the period range of approximately 20-100 s, as measured in Siple, Antarctica. In several intervals during four magnetic storms, correlations were significant at the 3-4 sigma level. During some of these intervals, correlations between the magnetic field fluctuations in the northern and southern hemispheres was less than 2 sigma. The noise absorption and magnetic field fluctuation patterns are consistent with changes in the ionospheric conductivity at approximately 100 km produced by particle precipitation. The possibility of modulation of particle pitch angle distributions by highly localized hydromagnetic waves in the earth's magnetosphere is considered.
Evans Chris
Lanzerotti Louis J.
Maclennan Carol G.
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