Via NASA's Suomi National Polar-Orbiting Partnership satellite:

Canada orbital view.jpg

On October 7th, the earth's atmosphere was bombarded with magnetic particles ejected into space after a storm on the sun earlier that week. The result: aurora borealis, a phenomena that, while colorful on Earth, appears as a gray, sandy wave on the Suomi satellite's infrared imaging radiometer.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.