Sun Unleashes Most Powerful Solar Flare of Year [1]
Weather.com - 4/12/13, Tariq Malik, Space.com
NASA/SDO
A look at a powerful M6.5 class flare, the strongest of 2013 at the time, at 3:16 EDT on April 11, 2013. This image shows a combination of light in wavelengths of 131 and 171 Angstroms.
The most powerful solar flare of the year erupted from the sun Thursday, sparking a temporary radio blackout on Earth, NASA officials say.
The solar flare occurred at 3:16 a.m. EDT and registered as a M6.5-class sun storm, a relatively mid-level flare on the scale of solar tempests. It coincided with an eruption of super-hot solar plasma known as a coronal mass ejection.
More: Weather.com. [2]