Physics
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.4273f&link_type=abstract
Journal of Geophysical Research, vol. 83, Sept. 1, 1978, p. 4273-4287. Research sponsored by the U.S. Department of Energy.
Physics
3
Earth Magnetosphere, Geomagnetism, Magnetic Storms, Polar Cusps, Polar Substorms, Satellite Observation, Explorer 34 Satellite, Lines Of Force, Magnetosheath, Particle Motion, Power Spectra
Scientific paper
High time-resolution data from the magnetic field, plasma, energetic particle, and VLF wave experiments performed aboard Imp 6 in a study of the distant dayside cusp during substorms are described. The cusp was studied when its location was slightly equatorward of its normal location and the geomagnetic dipole was tilted in the appropriate direction. The data support both reconnection and diffusion as methods of particle entry to the magnetosphere. The evidence (1) indicates an acceleration process to explain enhancements of 400 to 600-km/sec protons above their magnetosheath intensities, and (2) suggests convection of field lines over the polar cap as a means of explaining the lack of low-energy protons near the low-latitude boundary of the cusp. Magnetic field fluctuations, a perturbation vector, ion cyclotron waves, and an abrupt change in the intensity of both whistler waves and electrostatic waves are characterized.
Fairfield Donald H.
Hones Edward W. Jr.
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