Below are a few pictures from a spell of aurora activity between 21:15 and 22:05 UTC on a very clear evening. Activity this night was mostly moderate, although there was a period of activity between 21:09 and 21:35 that was much stronger with bright greens to the eye and several bands of dancing rays across the northern sky. This corresponded with a clear drop in the Leirvogur magnetometer reading (Image 7) – not a huge drop, but the dip of around -150 nT was enough to spark some stronger aurora to the eye. By 22:10 UTC the aurora was faint to the eye and I went home due to freezing temperatures.
Image 1. 21:16 UTC. Taken at: ISO = 1600, f/2.8 @ 14 mm, exposure = 9.1 sec. Looking north-west.
Image 2. 21:29 UTC. Taken at: ISO = 1600, f/2.8 @ 14 mm, exposure = 13 sec. Looking north.
Image 3. 21:32 UTC. Taken at: ISO = 1600, f/2.8 @ 14 mm, exposure = 12 sec. Looking north.
Image 4. 21:39 UTC. Taken at: ISO = 1600, f/2.8 @ 14 mm, exposure = 10 sec. Looking north-west.
Image 5. 21:47 UTC. Taken at: ISO = 1600, f/2.8 @ 14 mm, exposure = 13 sec. Looking north-west.
Image 6. 22:05 UTC. Taken at: ISO = 1600, f/2.8 @ 14 mm, exposure = 11 sec. Looking north-east.
Image 7. The magnetometer read out from Leirvogur on the night of 7th/8th December 2017 showing a sharp dip at the time of the observed activity.
