Why do the Northern Lights occur? A brief explanation of what happens according to me is, that, The Aurora Borealis or the Northern Lights are caused when charged particles from the Sun collide with atoms and molecules in the Earth’s atmosphere at altitudes between 100 and 250 kms. Due to the collision, oxygen and nitrogen emit what is seen by us as auroral light. These lights are mostly seen in the areas north of the Arctic Circle, and rarely, below the Circle, and then only sometimes.
This card was sent to me by Tero .