It was caught on camera near the small town of Stykkisholmur on Sunday evening by keen photographer Vidir Bjornsson. "I was driving in heavy rain and so much wind and I just stopped the car because I could not believe what I was seeing," Mr Bjornsson tells the BBC. "First I thought I was just seeing some reflection from the window of my car, but then me and my friend who was driving decided to stop and try to get a picture of it." A second moonbow was also visible at the time, although it is hard to make out in the photograph.