1 – 2 ). It was of the same intensity as the UTA, and I did not have to wait long until I could catch sight of the suncave Parry arc, as well ( 3 ). Unfortunately, Tape-arcs cannot be confirmed from the images.
When the Sun was of 4.1°-4.5° elevation, besides the supralateral arc, another halo patch formed under the CZA ( 4 – 5 ). I automatically took it as part of a 46° halo, but later it turned out that it might as well be 46° contact arc. As contact arcs are formed by Lowitz-oriented crystals, I had a closer look at the top of the 22° halo (what was outside the thick cloud), and unsharp masking of photos revealed lines that may be Lowitz arcs – if not jpg artefacts. It must be noted that all these images were taken about 5-7 minutes before the halo patch appeared. ( 6 - 7 ).