Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992p%26ss...40..953c&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 40, no. 7, July 1992, p. 953-964.
Physics
19
Auroral Zones, Coherent Radar, Energetic Particles, Geomagnetic Pulsations, Magnetometers, Proton Energy, Iceland, Scandinavia, Wave Packets
Scientific paper
A giant pulsation (Pg) is described that was observed at different times with two arrays of magnetometers and with radar. The drift velocity, azimuthal wavenumbers, and longitudinal phase variations of the Pg over a large area are calculated along with the ionospheric convection electric field. The energies of the protons are given at around 10-20 keV depending on pitch angle, and energies of about 5-18 keV are derived to satisfy the bounce-resonance condition based on azimuthal numbers from magnetometer and radar data. The substorm particle injection preceding the Pg by one day is theorized to have donated the protons that drove the Pg, and the energies of the protons are given at near 11-24 keV. Bounce resonance is shown to be a tenable mechanism for generating the Pg event based on the data and analytical results.
Chisham Gareth
Orr Daniel
Yeoman Timothy K.
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