Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2899t&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 25, p. 2899-2902
Physics
8
Compression Waves, Earth Magnetosphere, Electric Fields, Geomagnetic Pulsations, Magnetoacoustic Waves, Magnetohydrodynamic Waves, Orbit Perturbation, Planetary Magnetic Fields, Plasma Oscillations, Satellite Observation, Shock Waves, Wave Propagation, Faraday Effect, Geophysical Satellites, Magnetohydrodynamics, Phase Velocity, Power Spectra, Shock Wave Propagation, Wave Dispersion
Scientific paper
Compressional Pc 3 magnetic pulsations and accompanying electric field oscillations were observed by the GEOTAIL satellite in the dayside magnetosphere on October 17-18, 1992. When interpreted in terms of MHD wave modes, the oscillations in the fields are consistent with fast magnetosonic waves propagating Earthward. This result lends strong support to the view that ULF waves generated near the quasi-parallel portion of the bow shock propagate into the magnetosphere and are observed as compressional Pc 3 pulsations in the dayside magnetosphere. The Earthward component of Poynting flux associated with the pulsations is approximately 5 x 10(exp -8) W/sq m.
Kawano Hideaki
Kokubun Susumu
Matsuoka Ayako
Matsuoka Hiroshi
Nakamura Maho
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