EFFECTS OF 2 TYPES OF SOLAR-WIND STREAMS ON INTENSITY VARIATIONS OF COSMIC-RAYS

The influence of two types of high-speed (HS) solar wind streams - cor onal-hole and solar-flare-associated - on cosmic-ray intensity has bee n studied using the neutron monitor data of three stations for the per iod 1972-1984, which includes the year 1980 of solar field reversal. T he cosmic-ray depressions associated with the coronal-hole streams are much smaller than the typically Forbush-like depressions. No spectral difference is found in the Forbush-like decreases between the periods before and after the polarity change.