Huge Solar Flare Erupts on Sun Huge explosion has potential to disrupt communication across Earth By Kevin Spak, Newser Staff Posted Mar 7, 2012 8:28 AM CST 30 comments Comments An image released by NASA on March 5, 2012 is a view of a X1 solar flare in a new active region on the sun, region 1429. It has let loose two M-class flares and one X-class so far. (AP Photo/NASA) (Newser) – The sun blasted out a massive solar flare last night, one that could have the potential to cause blackouts and other problems here on Earth, the Washington Post reports. The flare was an X5-class, the strongest category of flare, and, according to NOAA, "one of the largest solar flares of the current solar cycle." It let out a bright coronal mass ejection, but it's unclear yet if that wave is headed our direction. "Our best guess is, 'probably yes, but not directly toward Earth,'" SpaceWeather.com writes.