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SCIENCE

Aurora Simulator

Kp and Bz make the curtain; cloud and darkness decide whether you can see it. Set all four — or pick a location, pull the real conditions, and see the current chance of a sighting.

42%
Chance of a sighting
Marginal

Possible, but faint — activity is modest; expect a pale arc more than a curtain.

The solar wind's magnetic direction. South-pointing (negative) Bz opens the door — the more negative, the stronger the show.

Sky
◆ Replay any night

Pick a date: that day’s eight real Kp values (GFZ archive, three-hour slots) draw the curtain. Kp only — the night’s Bz, cloud and darkness are not in the archive, so there is no verdict.

Jump to a great storm

A visual analogy. Real colours come from oxygen (green/red) and nitrogen (pink) emission; "live conditions" combines NOAA SWPC + Open-Meteo data for the chosen location.