Severe Geomagnetic Storm Triggers Auroras Across Northern Hemisphere
Severe Geomagnetic Storm Triggers Auroras Across Northern Hemisphere
US · Published Jan 21, 2026
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.
Geomagnetic storm causes spectacular auroras worldwide
A severe geomagnetic storm has struck the Earth, triggering spectacular auroras across the Northern Hemisphere. Classified as a G4 storm by the National Oceanic and Atmospheric Administration's (NOAA) Space Weather Prediction Center (SWPC), this event was sparked by a powerful X-class solar flare. The resulting auroras have been observed at unusually low latitudes, stretching across parts of Europe and the United States.
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