Tuesday, 24 January 2006

Another case of reflected Lowitz arcs


News about reflected Lowitz arcs prompted another observation. This display was photographed by Juha Oksa on 22. December 2005 in Jyväskylä, Finland. The picture on the left presents arcs (arrow) that seem to match the inward curvature of the inner reflected Lowitz arc component (see Jari Luomanen photo in previous news). Thus we are having displays that have two arcs or either one alone. I would be inclined to believe that all cases are indeed reflected Lowitz arcs. We just have to figure out what kind of crystals make the occurrences with only one component. 

The photo on the right shows reflected Lowitz extending below parhelion (arrow) - the "parhelia leg" effect. But it may also be subparhelia. Effect shows up also in the other image. 

Photo on the left is stacked from three individual unsharp masked images.


  1. Juha I can see faint Moilanen arc in your display and I can see it well in this picture: