Reprinted from http://spaceweather.com:
Solar activity is high. During a 24-hour period straddling May 13th and 14th, the sun unleashed three X-class solar flares. These are the strongest flares of the year so far, and they signal a significant increase in solar activity. The source of the flares, a large sunspot on the sun’s eastern limb, appears poised to erupt again as it turns toward Earth.
Check http://spaceweather.com for updates and more information.