Description of substorms in the tail incorporating boundary layer and neutral line effects

Details Description of substorms in the tail incorporating boundary layer and neutral line effects Description of substorms in the tail incorporating boundary layer and neutral line effects

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15.1337l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, Nov. 1988, p. 1337-1340. Research supported by Aerospace Corp.

Physics

18

Field Aligned Currents, Line Spectra, Magnetic Storms, Plasma Layers, Plasma Spectra, Atmospheric Models, Space Plasmas

Scientific paper

A description of the substorm expansion phase that includes the formation of a neutral line in the relatively near-earth portion of the tail plasma sheet and phenomena observed in the plasma sheet boundary layer (PSBL) is proposed. Specifically, it is proposed that substorm onset results from the formation of a neutral line within the preexisting source region for the PSBL. The source region is presumably the tail current sheet, which is suggested to extend well earthward of 80 earth radii. Both before and after the neutral line forms, auroral field-aligned currents and large ion flows remain confined to the PSBL earthward of the source region.

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