ELECTRIC FIELD EVIDENCE FOR TAILWARD FLOW AT SUBSTORM ONSET.

A. Nishida, Y. K. Tulunay, F. S. Mozer, C. A. Cattell, E. W. Hones, J. Birn

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Electric field observations made near the neutral sheet of the magnetotail provide additional support for the view that reconnection occurs in the near-earth region of the tail. Southward turnings of the magnetic field that start at, or shortly after, substorm onsets are accompanied by enhancements in the dawn-to-dusk electric field, resulting in a tailward E multiplied by B drift velocity. Both the magnetic and the electric fields in the tailward-flowing plasma are nonuniform and vary with inferred spatial scales of several R//E in the events examined in this paper. These nonuniformities may be the consequence of the tearing-mode process. The E multiplied by B flow was also toward the neutral sheet and away from midnight in the events studied.

Original languageEnglish (US)
Pages (from-to)9109-9113
Number of pages5
JournalJournal of Geophysical Research
Volume88
Issue numberA11
DOIs
StatePublished - Jan 1 1983

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