Stockholm 20101201, halo display with helic arc.

[Mats]

Hi.
Yesterday I saw a good halo display with lot of arcs. Among them was my first sighting of the rare helic arc. A very happy treat for a halo freak.
There was also a glimpse of a Wegener arc.

Image.


Image unsharped masked.


More images
http://www.sbgo.se/halos/halo-101201.htm

Mats

[Steffen Hildebrandt]

Nice .

Steffen

[Elmar Schmidt]

The more so!

This is a classic display from the great North with its prominent Parry and continuous helic arcs, and quite a few things in the 46-deg-halo regime.

Has anybody an explanation for the fuzziness or width of the rings? Can't be odd rings, I guess, so could this be a consequence of imperfect (maybe just freezing or thawing?) crystals?

Congratulations!

Elmar


PS: whenever the 22-deg sundogs (parhelia) get brilliant and "triangular" like in some other photos on your site, you should be looking for the exceedingly rare 44-deg parhelia (well documented only ca. 20 times) due to dual scattering, cf.

http://www.atoptics.co.uk/halo/44pars.htm
http://www.flickr.com/photos/yvonne/819 ... t-1779424/

[Heiko Ulbricht]

Hej,

helt fantastiskt! Tack!

Hälsningar från Sachsen,
Heiko