Hall current as a source of the cross-tail current interruption, the asymmetric main phase field and the poleward expanding auroral bulge

Details Hall current as a source of the cross-tail current interruption, the asymmetric main phase field and the poleward expanding auroral bulge Hall current as a source of the cross-tail current interruption, the asymmetric main phase field and the poleward expanding auroral bulge

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..389a&link_type=abstract

Planetary and Space Science, vol. 30, Apr. 1982, p. 389-393.

Physics

5

Auroral Electrojets, Geomagnetic Tail, Hall Effect, Ionospheric Currents, Polar Substorms, Electric Fields, Magnetospheric Instability, Plasma Layers

Scientific paper

Although the ionosphere plays a passive part in the magnetosphere, providing the Pedersen current's closing circuit and dissipating power generated by the solar wind-magnetosphere dynamo, it plays an active role in Hall current closure by contributing to many substorm processes which were believed to be caused by magnetospheric processes. In this, the ionosphere becomes a battery, denoting a weak east-west electric field in the oval and implying that the westward electrojet should be associated with an eastward electric field while the eastward electrojet must be associated with a westward electric field. Such substorm phenomena as cross-tail current interruption, the asymmetric main phase field the poleward-expanding auroral bulge may be related to the closure of the Hall current circuit in the magnetosphere.

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