• A severe G4 geomagnetic storm, triggered by a powerful solar flare, caused widespread auroras visible across the Northern Hemisphere.
• The storm, peaking on January 19th and 20th, 2026, is the largest solar radiation storm in 23 years, though not the most intense geomagnetic storm in recent history.
• The NOAA's SWPC is monitoring the storm, providing updates and forecasts to mitigate potential impacts on communication systems and infrastructure.