ocr: CME (Coronal Mass Ejection) One of the most important solar events from Earth's perspective is the coronal mass ejection, the solar equivalent of a hurricane. A CME is an eruption of a huge bubble of energized plasma from the Sun's outer atmosphere, or corona. Having escaped the Sun's gravity, a CME speeds across the gulf of space at velocities of some 400 km/sec. They reach the Earth in 2.5to: 5 days. Just hours after blowing into space, a CME cloud can grow to dimensions exceeding those of the Sun itself, often as wide as 50 million kilometres across. As it ploughs into the solar wind, a CME ...
