Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ge%26ae..49.1199k&link_type=abstract
Geomagnetism and Aeronomy, Volume 49, Issue 8, pp.1199-1203
Physics
Scientific paper
Based on the data of the ground observations, the global distributions of the Pc5 geomagnetic pulsation amplitudes during the recovery phase of the superstorm of October 31, 2003, have been mapped, and an unusually deep penetration of these pulsations into the inner magnetosphere has been found out. Thus, two more zones with identical dynamic spectra and oscillation amplitudes from the polar to equatorial latitudes have been detected in the postnoon sector simultaneously with morning classical Pc5 pulsations in the narrow (˜63°-68° CGM) latitudinal band extended along longitude. The higher-latitude zone as if continues the morning band, and the lower-latitude zone is characterized by the maximal intensity at latitudes of ˜50°-57° CGM. The oscillation amplitudes are of the same order of magnitude in both zones. The zones are spatially separated by a very narrow latitudinal amplitude minimum and by a change in the phase and sense of rotation of the wave polarization vector. The pulsation spectra in the morning and daytime sectors are different, which indicates that the nature of the morning and postnoon oscillations is different.
Kleimenova N. G.
Kozyreva O. V.
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