Halos in the sky of Seitseminen National Park, Finland 25.8.2012

Observed phenomena: Halo phenomena
Light source: Sun
Origin: High clouds (cirrostratus)
Observed halo forms:

  • 22° halo
  • Upper tangent arc
  • Parhelia
  • Circumzenithal arc
  • Supralateral arc
  • Upper suncave Parry arc

Date: 25.8.2012
Time: 18:16-19:23
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm IS, Samyang 8mm fish eye

In the evening of 25th of August 2013 I noticed that there are some halos in the sky. I took my camera and started to observe and take some photos. In the beginning, there were only some ordinary everyday -halos in the sky (22° halo with parhelia), but then something more interesting appeared in the sky! An upper tanget arc and upper suncave Parry arc appeared with 22° halo and parhelia! Later also circumzenithal arc and supralateral arc (or 46° halo) joined with the other halo forms.

This was a pretty nice halo display, luckily I stayed and observed and documented it thoroughly! This was also the very first time for me in my life so far to observe the Parry arc (and the upper suncave subform of it)!

Below you can see photos from the halo display. All photos are unsharp masked.


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