Electric circuits and their generators in the earth's magnetosphere: The concept of electric circuits as applied to the first phase of the April 6, 2000, superstorm

Details Electric circuits and their generators in the earth's magnetosphere: The concept of electric circuits as applied to the first phase of the April 6, 2000, superstorm Electric circuits and their generators in the earth's magnetosphere: The concept of electric circuits as applied to the first phase of the April 6, 2000, superstorm

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ge%26ae..50..978m&link_type=abstract

Geomagnetism and Aeronomy, Volume 50, Issue 8, pp.978-987

Physics

Scientific paper

{1} The first phase of the superstorm on April 6, 2000 was studied based on the analogy between systems of magnetospheric currents and wire electric currents. The conventional dataset supplemented with maps of ionospheric equivalent currents (ECs) and field-aligned currents (FACs) was also used. The application of this analogy made it possible to introduce spatial R.N inhomogeneities into FAC distributions in the two-dimensional ionosphere and three types of meridional current systems, MCS-0, MCS-1, and MCS-2, providing electric coupling of three Iijima and Potemra FAC Regions. This basis was used to describe the formation and observed dynamics of ionospheric auroral electrojets and three-dimensional current systems in a disturbed magnetosphere-ionosphere system. The results the modify known paradigms of the substorm current wedge (SCW). A new important fact was noted: simultaneously with the beginning of the disturbance expansion phase due to the stepwise growth in the dynamic pressure of the solar wind (SW), the stepwise growth in the area of polar cap and in the electromagnetic energy flux coming to the magnetosphere from the SW were observed.

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