G3Peak 4 April 1991 at 12:00 UTC
Northern Lights on 4 April 1991 (Kp 6.7): Where They Were Visible
Kp reached 6.7. At that level the edge of the auroral oval reaches about 53.2° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 48.7°. Activity stayed at storm level (Kp 5 or more) for 15 hours.
Kp 0–3 Kp 4 Kp 5–6 (G1–G2) Kp 7+ (G3+) Times in UTC; faded bars are forecasts.
Three-hourly Kp from GFZ, one day either side of the storm.
Where the aurora could be seen
1,519 towns on our list had enough activity while it was dark there. Cloud cover is not included.
Only in photos
2,269 more towns could have caught a faint red or green glow low on the horizon with a phone or camera.
- GermanyHamburg, München, Bremen
- PolandGdańsk, Szczecin, Bydgoszcz
- HungaryBudapest, Debrecen, Miskolc
- ChinaHarbin, Ürümqi, Daqing
- SwitzerlandZürich, Basel, Bern
- FranceNantes, Rennes, Angers
- IrelandDublin, Galway, Tallaght
- NetherlandsGroningen, Leeuwarden, Alkmaar
- AustriaVienna, Graz, Linz
- SloveniaMaribor, Murska Sobota, Šentilj v Slov. Goricah
- SlovakiaBratislava, Petržalka, Nitra
- LiechtensteinSchaan, Triesen, Balzers
- South AfricaCape Town, Gqeberha
- UkraineOdesa
Whether the aurora was actually seen also depended on the weather. Use this as a guide to where it was possible.