Physics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.9939h&link_type=abstract
Journal of Geophysical Research, vol. 86, Nov. 1, 1981, p. 9939-9944.
Physics
6
Auroral Zones, Ionospheric Electron Density, Magnetic Storms, Radio Probing, Electron Energy, F Region, Field Aligned Currents, Plasmapause, Satellite Observation, Scintillation
Scientific paper
Two areas of irregularities are found during magnetic storms by VHF and UHF scintillation observations at auroral and subauroral stations, as well as in situ measurements by ISIS 2 in 1971-1972 and S3-2 in 1975-1976. The plasmapause irregularities are located on the equatorward edge of the trough and may extend several degrees in latitude. While the poleward wall of the trough is the beginning of the region where auroral oval F layer irregularities are found, the electron density trough shows very low activity of irregularities. In light of electron and ion density, electron temperature, magnetic field and precipitating particle measurements by S3-2, it is suggested that the plasmapause irregularity production mechanism is the temperature gradient drift instability. It is also shown that auroral irregularities are closely related to field-aligned currents.
Aarons Jules
Houminer Zwi
Rich F.
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