From NOAA Space Weather Prediction Center and spaceweather.com: Strong Solar Flare Radio Blackout
Newly numbered Region 1990 (the return of old Region 1967), just now rotating into view, produced an R3 (Strong) Solar Flare Radio Blackout at 0049 UTC on February 25 (7:49 pm Eastern on February 24). It was an X4.9-class solar flare. This is the most intense flare of 2014 so far, and one of the most intense of the current solar cycle. NASA’s Solar Dynamics Observatory recorded the extreme ultraviolet flash:
Although impressive, the source of this event is well off the Sun-Earth line and the coronal mass ejection (CME) associated with this event is not headed directly at Earth. Analysis continues to determine what, if any, geomagnetic impact this will have. Additionally, a slow-rising S1 (Minor) Solar Radiation Storm is in progress as a result of this eruption. This region will continue to rotate into a better position to affect Earth over the next week or so. Stay tuned for updates.
Watch near real-time data at WUWT’s Solar Reference Page: http://wattsupwiththat.com/reference-pages/solar/