Spatial structure of ion bounce wave in the magnetosphere

Details Spatial structure of ion bounce wave in the magnetosphere Spatial structure of ion bounce wave in the magnetosphere

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.6877l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, June 1, 1986, p. 6877-6883.

Physics

3

Earth Magnetosphere, Geomagnetism, Ionic Waves, Magnetic Variations, Ground Stations, Ion Motion, Magnetic Signatures, Oscillations, Periodic Variations, Power Spectra, Protons

Scientific paper

Large amplitude (about 5-30 nT), high-frequency (about 0.14 Hz) geomagnetic field oscillations were observed across eastern North America and in the conjugate region in Antarctica during a large magnetic storm. These are the largest amplitude oscillations reported to date in the Pc 2 frequency band (0.1-0.5 Hz). The waves are first seen on the east coast, with the onset delayed by about 4 min at the midcontinent stations. The oscillations are consistent with a wave excited by the bounce motion of protons with a peak in the energy distribution at about 100 keV, with the energy source drifting from east to west with the ion gradient B drift.

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