The midday, discrete auroral gap

Details The midday, discrete auroral gap The midday, discrete auroral gap

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.4227d&link_type=abstract

Journal of Geophysical Research, vol. 83, Sept. 1, 1978, p. 4227-4236.

Mathematics

Logic

5

Auroral Arcs, Daytime, Satellite-Borne Photography, Meteorological Satellites, Polar Substorms, Statistical Analysis

Scientific paper

A gap in the midday sector of the auroral oval is studied by examining 38 suitable photographs selected from all of the Defense Meteorological Satellite Program satellite auroral photographs recorded in June 1975 over the southern hemisphere. No discrete auroral arcs extending continuously across the noon sector were detected; the gap appears typically to extend over more than 15 deg of longitude or, correspondingly, more than 1 hour of local time and is centered about the 1000 corrected geomagnetic local time meridian. Correlations of substorm and polar cap arc phenomena with the gap are described. It is suggested that the gap is a semipermanent feature of the midday auroral distribution.

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