Attached are images captured from an aurora display observed by Caithness Astronomy Group members on 13th October from Caithness in northern Scotland. Hope you'll find them of interest.

The triptych of images show an aurora related phenomenon nicknamed "Steve" that has been studied quite a lot recently*. This is the second time I have positively seen it, and as it happened during an impromptu Caithness Astronomy Group observing session, quite a few members were treated to this somewhat unusual sight. The fine detail within this arc of light, that at one point stretched overhead form eastern to western horizon, is not really visible from the images as it was changing quite quickly. The movement was mesmerising to watch - a really unforgettable view.

Gordon Mackie

Thurso, Caithness

• All images were taken with a tripod mounted Canon 760D DSLR and 10-20 mm Sigma lens set at 10mm focal length and f3.5 aperture. Adobe Lightroom v6 was used for the image editing.
• The triptych shows 3 separate views of "Steve" during a 10 minute period. Exposure settings were (left to right) 15, 20 & 25 seconds at ISO 6400. The left image show the view towards the western horizon, the right image is the view to the east, and the middle image shows overhead.