The auroras occur in what layer
Thermosphere-overview. The aurora (Northern Lights and Southern Lights) mostly occur in the thermosphere. Credit: Image Science & Analysis Laboratory, NASA Johnson Space Center. The thermosphere is a layer of Earth's atmosphere.he thermosphere is directly above the mesosphere and below the exosphere. It extends from about 90 km (56 miles) to between 500 and 1,000 km (311 to 621 miles) above our planet.