Physics
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...101.7737a&link_type=abstract
Journal of Geophysical Research, Volume 101, Issue A4, p. 7737-7748
Physics
84
Magnetospheric Physics: Storms And Substorms, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Current Systems, Magnetospheric Physics: Auroral Phenomena
Scientific paper
The magnetospheric magnetic field is highly time-dependent and may have explosive changes (magnetospheric substorms and geomagnetic storms) accompanied by significant energy input into the magnetosphere. However, the existing stationary magnetospheric models can not simulate the magnetosphere for disturbed conditions associated with the most interesting magnetospheric physics events (intensive auroras, particle injection in the inner magnetosphere, and precipitations at the high latitudes, etc.). We propose a method for constructing a nonstationary model of the magnetospheric magnetic field, which enables us to describe the magnetosphere during the disturbances. The dynamic changes of the magnetosphere will be represented as a sequence of quasi-stationary states. The relative contributions to the Dst index by various sources of magnetospheric magnetic field are considered using a dynamic model of the Earth's magnetosphere. The calculated magnetic field is obtained by using the solar wind and geomagnetic activity empirical data of the magnetic storm of March 23-24, 1969 and the magnetic disturbance of July 24-26, 1986. The main emphasis is on the current system of the magnetospheric tail, the variations of which enable a description of the fast changes of Dst.
Alexeev Igor I.
Belenkaya Elena S.
Feldstein Ya. I.
Grafe A.
Kalegaev Vladimir V.
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