NOAA satellite detects potential X-class solar flare from sunspot.

A highly unstable sunspot, AR3311, which was responsible for an X-class solar flare eruption last week, is in full Earth view and can again explode to a terrifying effect. NOAA forecasters say there is a 75% chance of M-class flares and a 30% chance of X-flares. If the sunspot does explode and blasts an X-class solar flare, the resultant coronal mass ejection (CME) that escapes into space could be large enough to trigger even a G5-class geomagnetic storm.