Fired from a vast sunspot, the "coronal mass ejection" is expected to reach Earth on either Thursday or Friday this week.

BOULDER, Colo. — According to the Space Weather Prediction Center (SWPC) in Boulder, a solar flare detected on the sun Thursday was the strongest flare since the beginning of this solar cycle in 2020.

A solar flare is an extremely bright flash of radiation. It occurs when magnetic energy associated with a sunspot is suddenly ...