A "monster sunspot" 60,000 miles wide could send some powerful solar flares toward Earth on Wednesday, NASA says.
The sunspot -- actually a group of four spots, each larger than Earth, and smaller spots -- emerged over the weekend and was spotted by the orbiting Solar Dynamics Observatory and amateur astronomers, Spaceweather.com reported (via Space.com). It tossed off a moderately strong M-class flare today, and is expected to follow up with even stronger flares, possibly even X class.
more: content.usatoday.com
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