Northern Lights Alaska

This is a thirty minute time lapse photo of the Northern Lights on December 7th. It was taken just outside of Aurora, Alaska. The lights span up to an altitude of 100 km. They stretch more than 500 km across the sky. These lights were caused by a moderate level geomagnetic storm and a high speed solar wind stream hit Earth's magnetosphere. I found it really cool that something like magnetic fields from the Sun can cause the pretty Northern Lights here on Earth.