Physics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.6369b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A5, May 1, 1992, p. 6369-6379.
Physics
20
Earth Magnetosphere, Electrodynamics, Interplanetary Magnetic Fields, Magnetic Signatures, Polar Cusps, Magnetopause, Particle Precipitation, Satellite Observation
Scientific paper
Possible low-altitude field signatures of merging occurring at high latitudes during a period of strong northward directed interplanetary magnetic field are reported. Large electric and magnetic field spikes detected at the poleward edge of the magnetosheathlike particle precipitation are interpreted as field signatures of the low-altitude footprint of such merging line locations. A train of phase-shifted, almost linearly polarized electric and magnetic field fluctuations was detected just equatorward of the large electromagnetic spike. It is argued that these may be due to either ion cyclotron waves excited by penetrating magnetosheath ions or transient oscillations in the frame of convecting plasma, brought about by the sudden change in the flow at the magnetospheric end of the field line.
Basinska Ewa M.
Burke William J.
David Winningham J.
Hanson William B.
Hughes Jeffrey W.
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