Observations of small-scale auroral vortices by the S3-2 satellite

Details Observations of small-scale auroral vortices by the S3-2 satellite Observations of small-scale auroral vortices by the S3-2 satellite

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3127b&link_type=abstract

Journal of Geophysical Research, vol. 88, Apr. 1, 1983, p. 3127-3137.

Physics

47

Auroral Zones, Current Sheets, Magnetohydrodynamic Flow, Polar Substorms, Satellite Observation, Vortices, Electric Fields, Equatorial Atmosphere, Flow Distribution, Geomagnetism, Magnetic Field Configurations

Scientific paper

Two S3-2 satellite-observed intense auroral events encountered during a substorm near the equatorial edge of the region 1 current system are marked by large deflections in the east-west magnetic field component, with the deflection corresponding to an upward current sheet being the sharpest. The principal region of return current is not contiguous with the upward current sheet and is more spatially extended. In the region between the current sheets, adjacent to the principal upward current sheet, the electric field rotated by 180 deg and then returned to its original orientation. Such electric field variations give rise to vortex plasma flow patterns similar to those observed in auroral folds and curls.

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