Facing north: Timelapse revealing faint airglow ripples.
April 30, 2025. Another clear night and there appeared to be an aurora substorm forming, so I set up a timelapse. I didn’t see much aurora, but there was some faint red and green airglow instead. From 1 - 3 am MDT (7:00 - 10:00 UTC April 30, 2025). Nikon D750, f2.8, 20 second exposure, iso 3200, 14mm Sigma Art lens