Abstract
The paper provide, approaches for formulating general ideas of a gas dynamic stage for an explosion in the upper atmosphere in which the geomagnetic field is of importance. Various versions concerned with magnetic pressure influence, particle collisions, and the latitudinal atmosphere nonuniformity are discussed. The following magnetogasdynamic models are constructed: 1) a quasitwo-dimensional model which treats the spherically symmetric flows with the magnetic force averaged over angles, 2) a two-dimensional model, and 3) a three-dimensional model. The latter model is applied to a general case of an arbitrary directed magnetic field. The computational results obtained for particular flows according to the magnetohydrodynamic (MHD) models are given. In the next paper we substantiate the MHD-theory application even for very rarefied magnetified plasma
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