y SOLAR CYCLE BY A LOOK OF HIGH SPEED SOLAR WIND STREAMS VARIATION

In this paper are presented variation of the solar wind parameters during last four solar cycles (21 divided by 24) with focus on the high speed solar wind streams (HSS) condition. The averaged values of the parameters for every cycle are calculated and discussed. The results show that Earth is under the HSS influence more than 50% of the total time in each of the last four solar cycles. This fact determines the importance of the studding the behavior of the HSS.