Carrington-Class Sunspot, G3 Geomagnetic Storm and Cold Moon Supermoon: What to Know on December 6, 2025
A massive sunspot complex, AR 4294–4296, now faces Earth, rivaling the scale of the 1859 Carrington Event region. NOAA reports a strong geomagnetic storm has eased but warns of more minor disturbances from a recent solar eruption. December’s Cold Moon, the last supermoon of 2025, remains visible after reaching full phase on December 4.