Questions,
Answered.

Aurora is faint. Daylight, and even late twilight, hides it completely, however active it is. Zorja waits until the sun is far enough below the horizon. Under the midnight sun it can stay too bright all night.

Give your eyes 20 minutes away from screens and lights, then look north. Faint aurora can look grey to the eye while a phone camera shows green. Zorja also can’t see local haze, fog or streetlights. Its answer is guidance, not a promise.

Darkness and clouds can be planned for the next three nights. Aurora itself can only be known about 90 minutes ahead, so Zorja never guesses it for later nights. Further south, it shows when a forecast storm could reach you.

A number would look more precise than anyone can be. Zorja’s assessment is experimental and not scientifically validated, so it gives a plain answer (go out, wait or skip) and says why.

Your location is read once when Zorja checks the sky. Only a rough area, rounded to about a kilometre, is sent to get your forecast. There’s no account and no history of where you’ve been. The privacy policy has the details.

Anywhere. Aurora shows most often in the far north, in places like northern Norway, Sweden and Finland, Iceland, Alaska and northern Canada. Further south it takes a strong storm, and Zorja tells you when one is forecast.

Aurora and the geomagnetic forecast come from NOAA’s Space Weather Prediction Center. Clouds come from MET Norway. Darkness is worked out from the sun’s position for your place.

No. Zorja is free, with no account, no ads and no tracking.

Not yet. For now, open Zorja when you’re thinking of going out, and add the best night to your calendar from 3 Nights.