"An intense solar flare took out low-frequency radio communications
over South America and the Atlantic Ocean earlier today (Sept. 28), and the unstable sunspot is likely to erupt again.
...At 10:53 a.m. EDT (1453 GMT), the medium-size M7-class solar flareburst from the sunspot called Active Region 2422 (AR2422).
...The peak of the action, when there was a brief radio communications blackout on the sunlit side of Earth, was about 5 minutes later, at 10:58 a.m. EDT (1458 GMT).
"AR2422 has an unstable 'beta-gamma-delta' magnetic field that could erupt again at any moment," Spaceweather.com said in its forecast.
At the time of this writing, there was a 40-percent chance of another, similarly sized solar flare and a 5 percent chance of a powerful X-class flare during the next 24 hours. X-class flares can cause planet-wide radio blackouts and radiation storms, and are 10 times more powerful than M-class flares..."
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