Surprising red aurora captured over Manitoba, Canada

Surprising red aurora captured over Manitoba, Canada

Night-sky photographer Alan Dyer captured a surprising red aurora over Churchill, Manotoba, Canada on February 14, 2015.The image below is his single, 25-second exposure at f/3.5 with the 180° fish-eye lens and Canon 6D at ISO 4000. It is part of a time-lapse sequen