SUPERPOSED EPOCH ANALYSIS OF MAGNETOSPHERIC CONVECTION ELECTRIC FIELD DURING GEOMAGNETIC STORMS DUE TO HIGH-SPEED SOLAR WIND DURING SOLAR CYCLE 24

The present study concerns the time variation of the MCEF with respect to geomagnetic phases as shown by SymH time variation by means of a superposed epoch analysis during solar cycle 24 for HSSW.For this work the magnetosphere input energy behavior is also highlighted. During IP and MP, the main effect of storm is the drop of MCEF and the decreasing particles density especially during the storm MP. During MP and RP, there is convection into a magnetosphere and the time for the total releasing of magnetosphere energy is longer that devoted to the RP. From IP to MP + RP, are pointed out the substorm onsets and the presence of substorms during the MP. From IP to MP + RP, the substorms that occur during the MP and the generated storms are not HILDCAA.