Strange lunar halo with an excessive lower tangent arc

This photo was taken on 28.10.2015 at 10:10 p.m (local time) near the Swedish city Tärnabi – a birthplace of the famous Swedish skiers Ingemar Stenmark and Anja Pärson (65° 43' N; 15° 18' E). We were on the road with my best man Rosen Vatchev and my wife, when we saw a strange glow just over the road. Getting out of the car, we saw a full lunar halo with clear parhelic circle and upper and lower tangent arcs. The latest one was the glow over the road. The explanation of this phenomenon is following: in an absolutely clear night and almost full moon, we passed near the ski pistes of Tärnabi, where multiple machines were making artificial snow. Billions of crystals ejected from the machines were responsible for this show. The image above was taken using my Canon 60 Da camera with 10mm lens. The exposure time was 0.6 sec at 3200 ISO. Hovering the mouse over the image will show the names and position of the different atmospheric phenomenons, as well as an annotation map of the background sky.


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