Severe solar storm alert: NASA tracks CME as NOAA upgrades G4 geomagnetic storm
WASHINGTON, Jan 20, 2026, 09:52 EST The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center said a severe geomagnetic storm hit the agency’s G4 level early Tuesday, with storm conditions logged at 3:23 a.m. and again at 5:21 a.m. Eastern time.