A large solar flare yesterday triggered a coronal mass ejection travelling at 1400 km/s that will reach Earth today. An energetic eruption of this level can disrupt satellites, so operation teams at ESA and other organisations are closely monitoring the storm.
A coronal mass ejection (CME) is a huge cloud of magnetised plasma from the Sun’s atmosphere – the corona – thrown into interplanetary space. They often occur in association with a solar flare. This ejection was detected by the ESA/NASA SOHO and NASA Stereo spaceborne solar observatories. See: Solar storm heading toward Earth
|Center time of most recent polar pass measurement: 2012 Jan 25 0137 UTn = 2.16|