Overview
- An Earth‑directed coronal mass ejection triggered a G4 geomagnetic storm on Jan. 20, expanding the auroral oval far from the poles.
- Auroras were seen across Europe, Canada and the United States, reaching areas where sightings are typically rare.
- Reports highlighted vivid green and pink displays in countries such as Germany, the Netherlands and Norway, as well as over Canada’s Yukon.
- Authorities warned that severe geomagnetic disturbances can intermittently affect satellite links, radio signals, navigation and sensitive grids.
- Operators and scientists remain on alert for delayed or localized impacts, with monitoring continuing after the initial spectacle.