Physics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.3389p&link_type=abstract
Journal of Geophysical Research, vol. 84, July 1, 1979, p. 3389-3402.
Physics
Auroras, Evening, Magnetic Storms, Polar Orbits, Satellite-Borne Photography, Deflection, Explorer Satellites, Geomagnetism, Histograms
Scientific paper
Expansions and contractions of the auroral oval and substorm activity over a 10-day period were studied. Changes in latitude of the equatorward boundary of the diffuse aurora, scaled at 2000 CGT from DMSP photographs, reflect expansions and contractions of the oval. Hourly average and 5-min average IMF z-component data and auroral electrojet data are examined relative to the expansions and contractions of the oval and to auroral substorm activity as seen in the photographs. The minimum-size oval occurs near 73 deg CGL at 2000 CGT. Over the range of z-component values examined, the oval expands or contracts by less than 2.5 deg within 102 min, which is the temporal resolution limit imposed by the DMSP satellite orbital period. As was previously reported, the z-component appears to control both the expansion and the contraction of the oval. Substorm activity accompanies both the expansion and the contraction. Substorms which occur during the oval expansion are more intense than the substorms which occur during the ensuing contraction. Also, the oval appears to be able to expand more rapidly than it can contract.
Dandekar B. S.
Pike Charles P.
No associations
LandOfFree
Evening sector auroral oval dynamics from DMSP photographs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evening sector auroral oval dynamics from DMSP photographs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evening sector auroral oval dynamics from DMSP photographs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1557140