We pin your latitude
The moment you land, we approximate your location and translate it to your geomagnetic latitude — the thing that actually decides how strong a storm has to be for the aurora to reach you.
Alerts
Get told when to look up
Most aurora apps buzz you every time the Kp index twitches — usually when it's cloudy, daylight, or the storm is nowhere near your latitude. We do the opposite: one email, only on the nights the aurora is genuinely reachable from where you are.
Aurora alerts
How it works
We set your threshold
From that latitude we compute the Kp level at which the auroral oval reaches your sky. That becomes your personal trigger — Kp 3 in Tromsø, Kp 7 in London. Nudge it up or down if you'd rather wait for a stronger show or catch a faint one.
We watch the NOAA forecast
Each evening we pull the planetary Kp forecast from NOAA's Space Weather Prediction Center. If tonight's peak meets your threshold, you get one email. If it doesn't, you hear nothing.
We never spam you
One email per qualifying night at most — never a daily digest, never a marketing blast. We store only your email, coordinates and threshold, and every email carries a one-click unsubscribe. That's the whole deal.
Prefer to just check tonight?
See tonight's live forecast