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Aurora guides that go beyond "check the Kp index."

Timing, cloud cover, the Kp index, and everything else that decides whether tonight is actually worth staying up for.

Aurora Basics

What Time Are the Northern Lights Visible Tonight?

The northern lights are usually easiest to see between 10pm and 2am local time — but timing is only one part of it. Here's how to know if you'll actually see them.

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More guides on aurora photography, storm watching and the Kp index are on the way.