Computer Science
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ge%26ae..25..150g&link_type=abstract
Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 25, Jan.-Feb. 1985, p. 150-153. In Russian.
Computer Science
Auroral Arcs, Magnetic Storms, Polar Caps, Polar Substorms, Antarctic Regions, Convexity, Daytime, Photometry, Time Response, Visual Observation
Scientific paper
Visual and photometric observations at the Antarctic station Vostok are discussed which show that the auroral convexity and the related auroral curve can travel far into the daytime sector of the polar cap during powerful magnetic disturbances. Unusual auroras of this type were observed at the Vostok station during the global storm of July 13-15, 1982, one of the most powerful storms of the current solar cycle. At 15:30 and 17:05 UT on July 14, the auroral convexity encompassed the latitude sector from 78 to 90 deg, lying between the 14-17 MLT meridians. This means that the region bounded by the auroral oval (i.e., the polar cap) was compressed to a minimum during these periods and was situated not around the invariant pole but at the daytime cusp.
Gusev G. M.
Troshichev Oleg A.
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