Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.5791e&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, May 1, 1990, p. 5791-5804. Research supported by NSERC.
Physics
73
Auroral Zones, Interplanetary Magnetic Fields, Magnetic Field Configurations, Satellite Imagery, Azimuth, Spatial Distribution, Temporal Distribution, Viking Spacecraft
Scientific paper
Viking images obtained throughout 1986 have been utilized in combination with IMP 8 satellite measurements of the IMF to determine typical Northern Hemisphere auroral distributions for a variety of IMF Bz positive conditions. Varying By has an effect which is consistent with expected results; that is, By positive implies high-latitude auroral arcs in the dusk sector, while negative By gives dawn-sector polar arcs. A new result gives significant importance to the Bx component of the IMF. Bx toward the sun gives polar arcs on both dawn and dusk with comparatively weak UV emissions. With Bx away from the sun, a single sun-aligned morning-sector polar arc dominates the auroral distribution.
Cogger Leroy L.
Elphinstone R. D.
Jankowska K.
Murphree John S.
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