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Giant solar flare detected

This NASA image taken on June 7, 2011 shows the Sun releasing a M-2 solar flare, a S1-class radiation storm and a coronal mass ejection. UPI/NASA
This NASA image taken on June 7, 2011 shows the Sun releasing a M-2 solar flare, a S1-class radiation storm and a coronal mass ejection. UPI/NASA | License Photo

PASADENA, Calif., Nov. 7 (UPI) -- A giant sunspot that erupted last week has been ranked as one of the largest solar flares seen in years, U.S. scientists said.

NASA said a powerful solar flare that erupted Thursday on the sun's surface has been classified as a powerful X1.9 flare. The flare triggered some disruption to radio communications, the U.S. space agency said on its Web site.

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"Scientists are continuing to watch this active region as it could well produce additional solar activity as it passes across the front of the sun," NASA said.

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