Space Weather News for Dec. 31, 2023 https://spaceweather.com https://www.spaceweatheralerts.com MAJOR X-CLASS SOLAR FLARE: Earth-orbiting satellites have just detected a major X5-class solar flare. It is the strongest flare of Solar Cycle 25 (so far) and the most powerful eruption the sun has produced since the great storms of Sept. 2017. The underlying sunspot is a giant, and it is turning toward Earth with more flares in the offing. Follow this story @ Spaceweather.com.