Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39..975d&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 39, July 1991, p. 975-982.
Physics
Frequency Ranges, Geomagnetic Micropulsations, Ground Stations, Magnetohydrodynamic Turbulence, Power Spectra, Diurnal Variations, Least Squares Method, Magnetospheric Instability
Scientific paper
Geomagnetic pulsation activity and local turbulence have been investigated at three stations located at different latitudes (L'Aquila, L about 1.6; Tuckerton, L about 2.6; Iqaluit, L about 13.0) for about 25 days during 1988. Hourly power spectra have been calculated in the period range 21.3-640.0 s (Pc3-Pc5) for the entire period of time. Enhanced Pc3 activity has been found at L'Aquila, the lower latitude station, and, in the lower frequency limit of the Pc3 band, at Tuckerton, but higher Pc3 levels are seen at Iqaluit, the highest latitude station. Spectral slopes ranging from about -1.5 to about -4.0 have been found, and sharp changes in spectral slopes are seen to occur in different frequency bands.
de Lauretis Marcello
Vellante Massimo
Villante Umberto
Wolfe Arthur
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