Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1017m&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 39, July 1991, p. 1017-1023.
Physics
5
Geomagnetic Micropulsations, Plasmasphere, Polarization Characteristics, Solar Terrestrial Interactions, Solar Wind Velocity, Interplanetary Magnetic Fields, Ion Cyclotron Radiation, Magnetohydrodynamic Waves
Scientific paper
The resulta are presented of a statistical study of the occurence, strength, frequency and polarization characteristics of magnetic pulsations in the Pc3 frequency range (0.022-0.1 Hz) recorded at Halley, L = 4, during September 1988. Similarities in the wave characteristics inside and outside the plasmasphere, suggest that many of the pulsations are due to forcing fast-mode waves. A correlative study with satellite measurements of the solar wind indicates a clear dependence of the occurrence and frequency of the pulsations, on the direction and magnitude of the interplantary magnetic field, respectively. This is consistent with the hypothesis that the source of the pulsations seen on the ground is ion-cyclotron waves generated upstream of the Earth's bow shock and is direct evidence for the transference of energy from the solar wind to the ground in the form of hydromagnetic waves.
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