Cloud cover fetched per location. Solar wind data is global. Scores update every 2 minutes.
Bz, solar wind speed, Bt and particle density are global — identical for all Iceland locations at any given moment.
The biggest difference between locations. Cloud data is fetched separately for each town's GPS coordinates from Open-Meteo.
Our 0–100 score weights Bz (45%), wind speed (25%), Bt (15%), density (5%), and cloud cover (10%) — applied locally per location.
Solar wind data updates every 2 minutes. Cloud cover refreshes every 15 minutes. Scores update automatically.
Once you know which location looks best tonight — book a guided aurora tour from Reykjavík.