LARGE SOLAR-WIND DISTURBANCES DURING LATE MAY AND EARLY JUNE 1991

Solar wind data from the Ames experiment aboard the Pioneer Venus Orbi ter, coincident with a period of unprecedented solar activity that beg an at the end of May, 1991, within the highly active earlier portion o f 1991, are summarized and discussed. Some comparison is made with cor responding data from Earth. Some particularly large, strong shocks and solar ejecta were observed at Venus. The solar longitude of Venus, re lative to associated flares, varied over a wide range, for a series of flares that produced X-rays that saturated the GOES X-ray counters. S ome of the disturbances at Venus must be due to CMEs with longitudinal extents up to similar to 40-50 deg.