The relationship between geomagnetic indices and the interplanetary medium parameters in magnetic storm main phases during CIR and ICME events

Abstract

This paper is a continuation of research (Boroyev and Vasiliev, 2018), in which the relationship of substorm indices both with the rate of storm development and electric field of the solar wind (SW) during the main phase of magnetic storms induced by CIR and ICME events for the 1979 to 2000 period was considered. In this paper on the basis of OMNI data for 1979–2017, the correlations between substorm indices and Dst variations, as well as with parameters of the interplanetary medium during the main phase of magnetic storms induced by CIR and ICME events, is analyzed. The obtained results confirm the dependence of substorm index variations on the type of interplanetary source and high efficiency of the SW electric field.