Modeling the Dst variation during magnetic storms

Details Modeling the Dst variation during magnetic storms Modeling the Dst variation during magnetic storms

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ge%26ae..46..563k&link_type=abstract

Geomagnetism and Aeronomy, Volume 46, Issue 5, pp.563-569

Computer Science

94.30.Lr, Magnetic Storms, Substorms

Scientific paper

A unified method for calculating the Dst index and its components using models of the magnetospheric magnetic field is proposed. The method is consistent with the procedure for calculating Dst from the ground-based magnetometer data. When calculating Dst, the quiet-day magnetic variation is subtracted from the model variation of the magnetic field of magnetospheric sources. The effect of induced currents flowing in the surface layer of the Earth’s crust is taken into account. The dynamics of the magnetospheric current systems during a storm is studied based on an analysis of the Dst components. The magnetic field components for a “quiet” day in June 1998 are studied. The calculations of the Dst components in the parabolid and T01 models demonstrate that the maximum contributions of the ring current and magnetotail current system to the Dst variation are comparable for the magnetic storm of June 25-26, 1998.

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