MAGNETIC STORM DEVELOPMENT AND ITS QUANTIFICATION FOR AIMS OF MODELING

Using a large sample of storms of different intensity the ring current magnetic field development is followed in terms of varying interplane tary conditions. It is shown that although the storm depression field is associated with energy input into the magnetosphere, the sustained IEF intensity <-5 mV/m as a condition for the occurrence of intense st orms appears not to be of general validity. Quantification of the magn etic storm development indicates the role of the actual state of the m agnetosphere in the development of its response on interplanetary medi um forcing. Ring current energization is considered for some storm mod els represented by pairs of energy injection rate and time decay param eter. A number of models are juxtaposed quantitatively. The adequacy o f modeling of storm profiles and the significance of decay parameter i n the magnetic storm development is discussed from the viewpoint of co nsistency of energy injection rate and energy decay rate and also with regard to an adequate distribution of dissipated energy within the ri ng current region and auroral ionosphere.