These are 'keograms' - a visualization of an entire night from sunset to sunrise, read like a sentence from left to right. You can spot cloudy nights, nights with a bright moon, and nights with aurora activity.
Below each keogram is a bar that shows the Kp-index throughout the night. It is a measure of geomagnetic activity. The more greomagnetic activity, the greater the chance of seeing the aurora. A Kp of 5 or higher is considered storm-level.
Clicking or touching on any night's keogram will open a virtual planetarium which allows you to experience that night's aurora!
These keograms are generated from publicly available timelapse video from the AuroraMAX all-sky camera, run by the
Kp Index archive from the Space Weather Prediction Center at NOAA.
This visualization project is not directly affiliated with these organizations.
Find an interesting night sky below and tap on it to time travel to that night.