Land and Rural Retreats St. Ignatius, Lake County, MT Farms and Ranches For Sale - 355 Acres
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.
A hurricane with a 74 mph wind is a Category 1 hurricane. Category 2 winds are at least 96 mph. Category 3 winds are at least 111 mph. A Category 4 hurricane has wind speeds of at least 131 mph, and those of a Category 5 are at least 155 mph.