Mapping and distortions of auroral structures in the quiet magnetosphere

Details Mapping and distortions of auroral structures in the quiet magnetosphere Mapping and distortions of auroral structures in the quiet magnetosphere

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.7973k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, June 1, 1990, p. 7973-7994.

Other

30

Auroral Arcs, Birkeland Currents, Current Sheets, Electric Fields, Lines Of Force, Magnetospheric Instability, Current Density, Diurnal Variations, Magnetopause

Scientific paper

The closed quiet magnetosphere model of Beard (1979) and Beard et al. (1982) is used to identify those features of commonly observed dayside auroras that can be explained by either of two processes: mapping distortions or distortions caused by nearby Birkeland currents. It is shown that single and multiple linear and hooked auroral forms can be easily explained in terms of mapping distortions in a quiet magnetosphere. On the other hand, the shapes of bright twisted or folded auroral forms can be more easily explained as distortions produced by localized Birkeland currents.

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