Significance of two types of high-speed solar wind streams in modulating cosmic ray intensity

One of the most dynamical interplanetary phenomena of solar terrestrial physics is definitely the passage of solar wind streams near the Earth environment. In this work, we have identified the two types of high-speed solar wind streams using the spacecraft data during high amplitude days. The behaviour of high-speed solar wind streams during high amplitude anisotropic wave trains is investigated for the period 1981-1994. The two types of high-speed solar wind streams (corotating streams and flare-generated streams) produce significant deviations in cosmic ray intensity during high amplitude anisotropic wave trains. On the onset of both types of streams the cosmic ray intensity reaches its minimum during high amplitude events and then increases statistically. It has been observed that both types of solar wind streams (Corotating and Flare generated) produce significant deviations in cosmic ray intensity during high amplitude anisotropic wave train events. PACS: 96.40.Kk, 96.40. -z, 96.40.cd