More rare halos in Czechoslovakia

Today was day of halos for all observers. I was seen: Parry arc, Infralateral arc. Martin Jankovic: Parry arc, 120 parhelia. Milan Cerny: Parry arc. Stepanka Kosova: Parry arc, 120 parhelia. Roman Manak: Parry arc and Martin Popek: 120 parhelia. For discussion: Lukas Shrbeny from Ondrejov had maybe Lowitz arc. You see his link.

Lowitz arc in Prague

Upper part of Upper Lowitz arc was observed yesterday (9.10.) in Prague, Czech by Milan Cerny. Milan seen nice parhelia, upper tangent arc and Parry suncave arc. Red arrow show Lowitz arc. Here is second photo

9° column arcs in Prague

Today Ondrej Vlach seen nice Lunar display in Prague, Czech. Halo, upper tangent arc and rare 9 column arcs. Ondrej say: "Left side of 9 halo was very bright and I was took some photos at 22:40 UT. I use Registax for photo stacking."

Lower Parry arc in Antarctica region

Joe MacGregor observed very rare Lower Parry sunvex arc in Antarctica. Joe say: "The photo was taken about January 19, 2006 somewhere within ~100 km of 79S, 117W. It was taken with a point-and-shoot Canon S230." More photos halos are here. Simulation is made with Halosim by Les Cowley and Michael Schroeder. This Sun display with Lower Parry sunvex arc is probably second case of the World.

Low sun Parry in Helsinki

October is probably the worst halo month in Finland. The last chances for good high cloud displays are gone with September and diamond dust is not swarming in until November. So it was nice to see today a low sun Parry starting to develop in the sky upon returning from grocery store. Grabbed pocket camera and tripod from my room and rushed to nearby parking lot.

The two images are stacked from series of 15 and 16 shots. The time span is two minutes in both stacks.

Earlier I had seen low sun Parry's only on two occasions. These were in high arctic Canada during diamond dust conditions. It took 22 years of observing to get one in high clouds.

Wegener arcs in Czechoslovakia again

Today (9:00 - 11:30 UT) was next nice day. Sky in Holesov showed clear and coloured Wegener arc and other arcs (common halos and upper Parry suncave arc, lower Lowitz arc and infralateral arc).

Display was photographed also by others. Here are the photos by Martin Jankovic from Brno.

[text: Patrik Trncak]

From archives: odd radius column arcs in 2001

I saw this display in Oulu on 17 September 2001. Because the photos have not been around in the internet, I dare to make posting even though the event is not so recent.

The display has all the odd radius column arcs except the 23° arc. Images are stacked from 3-8 individual images. The one on the lower right is also flipped horizontally to get a bit more definition. For the upper left and lower images, simulations of the pyramid column arcs give crystals as in the figure. Also shown is similarly shaped real crystal, photographed during a weak odd radius column arc display at South Pole in 1999.

From pyramid plate crystals there is the 23° plate arc in all photos, and lower 9° and 24° plate arcs in the upper right photo. The display was discussed in more detail in September 2003 number of journal Weather. It also appears in the book "Atmospheric halos and the search for angle x" by Tape and Moilanen.