Study of the relative geoeffectiveness of high-speed solar wind streams of different speed and different durations

We consider high speed streams (HSS) identified from 16 years (1996-2011) of continuous solar wind plasma and field data. We compare the geomagnetic response of the HSS of different speed and different durations based on statistical distribution, the superposed epoch analysis as well as the regression analysis. We analyse the geomagnetic responses of the HSS of different speed and durations together with the solar wind plasma and field data. The observed differences in the amplitudes, time profiles and recovery characteristics of geomagnetic disturbances during the passage of the HSS of different speed and durations are compared with the differences in the simultaneous solar wind plasma/field behaviour. Implications of these results on the solar wind-magnetosphere coupling are discussed. (C) 2019 COSPAR. Published by Elsevier Ltd. All rights reserved.