Solar Flare, 2013's Most Powerful So Far, Sparks Radio Blackout, NASA Says
Clip from Article: "... The most powerful solar flare of the year erupted from the sun today (April 11) sparking a temporary radio blackout on Earth, NASA officials say. The solar flare occurred at 3:16 a.m. EDT (0716 GMT) and registered as a M6.5-class sun storm..."
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