Overview
- NOAA’s Space Weather Prediction Center classified the geomagnetic storm as G4, noting onset around 01:20 Paris time after the overnight arrival of solar ejecta.
- Auroras were documented from Île-de-France and Normandy to the Alps and Provence between roughly 3:00 and 5:30 a.m., with sightings also reported in Iowa and Bavaria.
- Geomagnetic disturbance exceeded Kp 8 on the 0–9 scale, indicating very strong activity during the peak.
- Forecasters said the disturbance was ongoing, with displays expected Wednesday night into early Thursday around 23:00–03:00 and, per Thursday guidance, potentially again late Thursday into early Friday near 01:00–03:00.
- Viewers were urged to look north from dark locations or use webcams and alert services such as Space Weather, Aurora Forecast, My Aurora Forecast and skaping for short‑notice updates.