Physics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994angeo..12..636k&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 12, no. 7, p. 636-641
Physics
13
Auroral Arcs, Electric Fields, Field Aligned Currents, Ionospheric Conductivity, Ionospheric Currents, Magnetosphere-Ionosphere Coupling, Stability, Electrostatic Waves, Ion Concentration, Plasma Density, Plasma Pressure, Wave Propagation
Scientific paper
In this paper we study an instability of the plasma moving towards the Earth near the inner plasma sheet boundary. We include both the interchange instability of the plasma sheet and the magnetosphere-ionosphere interaction instability caused by an effect of field-aligned currents (connected with electron precipitation) on ionospheric conductivity. The instability leads to the separation of steady-state magnetospheric convection into parallel layers. This instability may be responsible for the appearance of quiet auroral arcs inside region 2 of field-aligned currents flowing out of the ionosphere. This instability allows us to explain also the existence of crossing auroral arcs.
Kozlovsky E. A.
Lyatsky W. B.
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