Where is the Aurora borealis located in the atmosphere?

The Aurora Borealis, or Northern Lights, occurs in the upper atmosphere, primarily within the thermosphere at altitudes of about 80 to 300 kilometers (50 to 200 miles) above the Earth's surface. It is produced when charged particles from the solar wind collide with gases like oxygen and nitrogen in the Earth's atmosphere, resulting in the beautiful, colorful displays. These phenomena are most commonly observed near the polar regions, where the Earth's magnetic field is strongest.