Earth hit by G4 severe geomagnetic storm due to CME that left the Sun on December 29th — NOAA
https://x.com/disclosetv/status/1874526552341512592
G4 (Severe) Geomagnetic Storm Alert Threshold Reached at 1241 ET
https://www.swpc.noaa.gov/news/g4-severe-geomagnetic-storm-alert-threshold-reached-1241-et