Compressional ULF waves in the outer magnetosphere. I - Statistical study

Details Compressional ULF waves in the outer magnetosphere. I - Statistical study Compressional ULF waves in the outer magnetosphere. I - Statistical study

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9619451z&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Nov. 1, 1991, p. 19,451-19,467.

Physics

46

Compression Waves, Earth Magnetosphere, Extremely Low Radio Frequencies, Radio Waves, Satellite Observation, Space Plasmas, International Sun Earth Explorers, Magnetic Fields, Polarization (Waves), Spatial Distribution

Scientific paper

Statistical properties of the ULF waves of period 2-20 min in the outer magnetosphere were studied using 14 months of magnetic field and plasma data obtained by the ISEE 1 and 2 spacecraft. It was found that intense compressional waves with typical wave periods of 10 min are a persistent feature near the two flanks of the magnetosphere; they are mainly polarized in a meridian plane with comparable compressional and transverse amplitudes and have larger amplitudes at higher latitudes. Transverse waves polarized in the azimuthal direction are found to be mainly a nightside phenomenon, and they seem to be associated with substorm activity.

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