G4Peak 30 July 1999 at 18:00 UTC
Northern Lights on 30 July 1999 (Kp 7.7): Where They Were Visible
Kp reached 7.7. At that level the edge of the auroral oval reaches about 51.2° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 46.7°. Activity stayed at storm level (Kp 5 or more) for 18 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
1,540 towns on our list had enough activity while it was dark there. Cloud cover is not included.
Only in photos
2,954 more towns could have caught a faint red or green glow low on the horizon with a phone or camera.
- HungaryBudapest, Debrecen, Szeged
- FranceLyon, Nantes, Bordeaux
- BelgiumBrussels, Antwerp, Ghent
- ItalyMilan, Torino, Genoa
- ChinaChangchun, Ürümqi, Daqing
- SloveniaLjubljana, Maribor, Celje
- SwitzerlandZürich, Geneva, Basel
- SlovakiaBratislava, Košice, Petržalka
- CroatiaZagreb, Split, Rijeka
- AustriaVienna, Graz, Linz
- CzechiaLiberec, Hradec Králové, Ústí nad Labem
- LiechtensteinSchaan, Triesen, Balzers
- TürkiyeBartın, Sinop, Artvin
- UkraineKyiv, Kharkiv, Odesa
- ArgentinaUshuaia, Río Grande
- ChilePunta Arenas, Puerto Williams
- South AfricaCape Town, Gqeberha
- SerbiaBelgrade
- Falkland IslandsStanley
Whether the aurora was actually seen also depended on the weather. Use this as a guide to where it was possible.