Computer Science
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..955v&link_type=abstract
Planetary and Space Science, vol. 24, Oct. 1976, p. 955-965.
Computer Science
7
Auroras, Geomagnetism, Magnetic Storms, Auroral Zones, Daytime, Evening, Interplanetary Magnetic Fields
Scientific paper
The direction of motion of the auroral forms in several sectors of the auroral oval during substorms is studied. The creation phase is characterized by the equatorward displacement of the luminous region in evening (15-21 LT) and in day (09-15 LT) hours, while individual forms in the luminous region drift mainly poleward with a mean velocity of 230 m/sec in day hours and equatorward with the mean velocity of 230 m/sec in evening hours. The equatorial shift of the luminous region correlates well with the vertical component of the interplanetary magnetic field. The onset of the displacement coincides with the southward vertical rotation and is accompanied by auroral intensity increase for about 10-20 min. During the expansive and recovery phases, the day auroras drift poleward with mean velocities of 330 and 300 m/sec, respectively. In the evening sector, the individual auroral forms drift both poleward and equatorward during the expansive phase but drift mainly towards the pole during the recovery phase with a mean velocity of 200 m/sec.
Feldstein Ya. I.
Starkov G. V.
Vorob'ev V. G.
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