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A model of currents and electric fields in a discrete auroral arc

1996; American Geophysical Union; Volume: 23; Issue: 18 Linguagem: Inglês

10.1029/96gl02378

1944-8007

E. M. Blixt, A. Brekke,

Solar and Space Plasma Dynamics

A discrete auroral arc is set up by precipitating electrons. Current continuity requires a return current fed by a horizontal current from the arc. In the closing of this current system E‐region plasma might escape along the return current, and if the source acts as a constant current generator the horizontal electric field can get enhanced. The existence and relative position of these features can be used to diagnose the state of the magnetospheric generator.