July | 2010 | Ice Crystal Halos

Moilanen arc without snowguns

24.7.2010 1 -

I was recently filing images digitized from somewhat older slides and came across this upper tangent arc image from many years ago, in the early morning from here in Calgary. I decided to subject this image to some processing, in…

Suggestion of observation: possible spurious arcs from Moilanen crystals

6.7.2010 1 -

Here is an observation suggestion for next winter. Marko Mikkilä photographed possible new arcs during winter 2007-2008 ( 1 ). Source elevation was -1.5°. Different processing shows them as not only 22° arcs but also new helic arcs. Some twinned…

Odd-radii again

2.7.2010 0 -

Alan Clark sent the above image, which shows the same display that Elmar Schmidt saw from Virginia, and which can be read about in the previous post. Alan photographed the halo from Dulles Airport, about 120 km NE of Elmar’s…

Monthly Archives: July 2010

Moilanen arc without snowguns

Suggestion of observation: possible spurious arcs from Moilanen crystals

Odd-radii again

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