Auroral boundary variations and the interplanetary magnetic field

Details Auroral boundary variations and the interplanetary magnetic field Auroral boundary variations and the interplanetary magnetic field

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32...25h&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, Jan. 1984, p. 25-29.

Computer Science

46

Auroral Zones, Geomagnetism, Interplanetary Magnetic Fields, Polar Caps, Earth Magnetosphere, Position (Location), Solar Wind, Statistical Analysis

Scientific paper

A DMSP satellite data set of 150 auroral images, obtained during magnetically quiet times, has been analyzed in corrected geomagnetic local time and latitudinal coordinates, and fit to offset circles whose parameters can be compared to the hourly IMF prior to the time of the satellite scans of the aurora. The results for variation of circle radius with the north-south component of the IMF B(z) agree with previously published results, and generally show a 1 deg radius increase when the B(z) component increases southward by 1 nT. The location of the circle center also has a clear statistical shift in the Southern Hemisphere with IMF B(y), such that the southern polar cap moves toward dusk or dawn with B(y) values greater than zero or less than zero, respectively.

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