NASAのインスタグラム(nasa) - 2月21日 08時45分

Sputters and spurts on the Sun’s only visible active region eventually unleashed this brief, bright flare on Feb. 7. The flare appears about mid-way through the half-day clip. Normally, we do not pay much attention to flares this small, but it was just about the only real solar activity over the week around Feb. 7 as the Sun is slowing approaching its quiet period of the 11-year solar cycle.
These images were taken in a wavelength of extreme ultraviolet light.
Credit: NASA/SDO
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