Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..20..491c&link_type=abstract
Astrophysics and Space Science, Volume 20, Issue 2, pp.491-497
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
It is suggested that changes in the electric field in the night-side auroral zone and polar cap observed during the expansion phase of a substorm are related to a change in the magnetospheric flow pattern. During the substorm growth phase the flow appears to be fairly uniform across the width of the magnetosphere (uniform electric field across the tail), while at expansion the observations are consistent with the magnetospheric potential drop in the tail falling across a narrow region near the dusk magnetopause. Such non-uniform electric fields in the tail have been predicted by recent theoretical work. A rather speculative interpretation of events during a magnetospheric substorm is presented.
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