An odd red aurora, at the start of the display on Feb 14, 2015, as seen from Churchill, Manitoba from the Churchill Northern Studies Centre. The curtains appeared mainly red at the start, then the green auroral curtains moved from east to west, from the horizon here to overhead over the next few minutes. The aurora then took on the more normal appearance with green curtains topped by fringes of red. Jupiter is at right.
This is a single 25-second exposure at f/3.5 with the 180° fish-eye lens and Canon 6D at ISO 4000.
The Amazing Sky 