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Sometimes odd radius halos come day after another. In April 1987 I observed three consecutive days of odd radius halos and in April 1996 Jarmo Moilanen had four days in a row. On both periods there was also one night…

There are not much around photos of parhelic circle that fits inside the 22° halo. Here is one, seen over La Silla astronomical observatory in Chile on 27 January 1990. Sun is at 79 degrees elevation. Damien Hutsemekers, who took…

Changing crystal shape causes surprising behavior with Liljequist parhelion, casting doubts on its identity as a halo form. Look at the simulations above, larger image opens by clicking. I have simulated (software: HaloPoint2.0) the anthelic side of the plate parhelic…

This reflection subsun was photographed on 21 April 2006 in Salt Lake City and has been on display in the Flickr since then ( 1 ). The photographer, Heron, correctly suspected that sun’s reflection from the Great Salt Lake might…

For a change a display from Africa. This was see in Accra, Ghana, on 10 March this year. The photo was taken by Kwaku Chintoh. Sun is at 75.5 degrees elevation. The two sun concentric halos are rather 9° column…

At last they are here: good photographs of Bottlinger’s rings! Tim Stone’s images of Bottlinger’s rings over Illinois were published today in Les Cowley’s site ( 1 ). The rings lasted only for a few seconds, but luckily Stone was…

One would think that such a demanding halo as Liljequist parhelia would need the best possible swarm to be seen. While that may be true in halo displays from natural light sources, with spotlight it is a different story. Here…

With the great lunar halo display from the beginning of the month still fresh in memory, Marko Mikkilä drove again to Sotkamo last monday. This time the catch was less spectacular, but something was nevertheless seen in the spotlight beam.…

Several of us have been talking about a possible explanation for M-arcs. The responsible crystals are twinned trapezoidal plates that have what might be called restricted Lowitz orientations. The crystals perform rotational oscillations about a horizontal axis, with the equilibrium…

Sometimes halo display actually comes to your door step. On October 14th Toivo Säkkinen got out of his house in Kuusamo to feed the birds. Instead, he decided to photograph the halos first. This must be one of the earliest…