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The solar wind speed at Earth normally lies around 300km/sec but increases when a coronal hole high speed stream (CH HSS) or coronal mass ejection (CME) arrives. During a coronal mass ejection impact, the solar wind speed can jump suddenly to 500, or even more than 1000km/sec.
Although less than Jupiter and Saturn, the wind speeds on Uranus can reach 900 km/hour, and seem to be changing as the planet approaches its equinox â when the rings are seen edge on. We have written many articles about the weather on Uranus for Universe Today. Hereâs one that talks about how stormy the planet can get.