Space Weather Prediction Center

National Oceanic and Atmospheric Administration

G3 (Strong) Geomagnetic Storm levels reached

G3 Strong storm Key messages and current aurora forecast image
G3 (Strong) Geomagnetic Storm levels reached
published: Thursday, September 18, 2025 12:31 UTC UTC

G3 (Strong) geomagnetic storm levels were reached at 15/0259 UTC (2259 EDT on 14 Sep) following the onset of increased solar winds from a coronal hole high speed stream. Stay tuned to our website for updates.