The back-to-back eruptions caused radio blackouts across two hemispheres as the active sunspots turn to face Earth.
A moderate solar flare might affect radio communications on Earth, the National Oceanic and Atmospheric Administration said ...
A erupted with M1 and M6 class solar flares. Watch the fireworks in these views from NASA's Solar Dynamics Observatory.
Sunspot AR3474 detonated with an X1.8 solar flare on November 4, sending an ultraviolet wave silencing South America's ...
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