I took this at our observatory at Sleaford which is about 40/45 miniutes east of Saskatoon Saskatchewan.
You can gauge the height of the aurora by the colors as each color is a chemical reaction you just have to determine which molecules radiate in what color and find what level they are at in the atmosphere.
This smallish aurora here is actualy an ionospheric sub-storm.
So put THAT in your pipe and smoke it!!!
Looks best in large size