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The Sun Just Released the Most Powerful Solar Flare in More Than a Decade

Solar flares occur when the sun's magnetic field twists up and reconnects, blasting energy outward that can cause radiation storms in Earth's atmosphere.

September 6, 2017
2:56 PM EDT
NASA's Solar Dynamics Observatory captured this view of a mid-level solar flare on the sun at 4:33 pm EDT on Monday (Sept. 4). | NASA/SDO