An aurora is a natural light display in the sky, caused by the collision of charged particles directed by the Earth’s magnetic field.
Aurora borealis (or the Northern lights) is in the northern latitudes.
Aurora Australis (or the southern lights) has similar properties, and is visible in southern latitudes.
The aurora borealis above Bear Lake. Wikipedia.
There is a colour differential with altitude, at a high altitude oxygen red dominates, then oxygen green and nitrogen blue/red. Green is the most common of all auroras. Behind it is pink, a mixture of light green and red, followed by pure red, yellow, and lastly pure blue. For more great photo’s and more information:- Wikipedia
I spent a week capturing one of the biggest aurora borealis shows in recent years.
Shot in and around Kirkenes and Pas National Park bordering Russia, at 70 degree north and 30 degrees east. Temperatures around -25 Celsius. Good fun. Terje Sorgjerd