tag:blogger.com,1999:blog-207778502011-09-06T23:55:32.309Zof interesting halo displays observed around the World.marko riikonennoreply@blogger.comBlogger1411100tag:blogger.com,1999:blog-20777850.post-62926465847579191872007-12-08T15:14:00.002Z2008-12-11T18:12:10.939Z

Because users are increasingly unhappy about the terms of use for the Blogger, we have decided to move the Halo Reports to another server. The new home is at the Ursa Astronomical Association server. Veikko Mäkelä made all the ground work. No more postings can be done to Halo Reports here, at the Blogger. With time, we try to move the old postings to new home so that the Halo Reports here at

marko riikonennoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-69144954542235251222007-12-05T21:41:00.000Z2007-12-05T22:09:03.002Z

Although this year only few haloes appeared over Germany, I could observe the second complex halo display on Mt. Wendelstein. In the morning I saw my first subsun in this year, which appeared in freezing fog. Later a veil of cirrostratus from a low pressure area over the Mediterranean Sea crossed the Alps from the south. Under those weather conditions, large halo displays can be seen very often.

Claudia Hinznoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-59606817023812311512007-12-04T19:50:00.000Z2008-12-11T18:12:11.775Z

It seems putting the photos of the recent displays to my web page will delay. So, in a meanwhile here are two more photos of the display three weeks back.When light source is at 0° elevation, some difficulties arises in identifying certain halos. Tricker arc and subanthelic arc merge together, as do helic and subhelic arcs. However, the subanthelic arc is formed by Parry-oriented crystals, while

marko riikonennoreply@blogger.com5tag:blogger.com,1999:blog-20777850.post-21639522927195385262007-12-03T17:34:00.001Z2008-12-11T18:12:15.734Z

Here is some more material from the diamond dust in Rovaniemi three nights ago. After the heaviest Parry-crystal bombarding was over, Moilanen arc appeared, as shown in the photo on the left. Moon gives the beauty spot.I have crystal photos from this stage, but as usual, they give no clue to Moilanen arc. In the earlier Parry-stage there was no indication of Moilanen arc whatsoever, but I did not

marko riikonennoreply@blogger.com10tag:blogger.com,1999:blog-20777850.post-84531006413912651972007-12-01T20:47:00.001Z2008-12-11T18:12:16.554Z

A bright halogen spotlight and diamond dust is a magic combination.Spot yourself exactly in the middle of the beam and breathtaking halo views may rewards you. An outsider will see just somebody bathing in the light and may wonder what is going on. There might be a Moon in the sky at the same time - like in the case shown here - but it shows hardly no halos at all. The lamp creates its own

marko riikonennoreply@blogger.com16tag:blogger.com,1999:blog-20777850.post-76254735248629878402007-11-17T10:35:00.001Z2008-12-11T18:12:16.803Z

Yesterday it was halos from sunrise to sunset in Rovaniemi. I was biking in the outskirts of the town in hope of getting into the heat of the things, but as afterwards many people told about good halos in and near the center, I think I missed the best action.Anyway, here is a photo showing Moilanen arc towards the end of the display. The image is stacked from 14 frames taken during one minute.

marko riikonennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-58750304129286942652007-11-15T12:51:00.001Z2008-12-11T18:12:16.999Z

Last night diamond dust formed again in Rovaniemi with help of Ounasvaara ski resort snow guns. Two photos of what was seen in the light beam of a bright lamp are shown here.In the upper image are diffuse anthelic arcs. In the lower image a number of common halos are seen together with Moilanen arc. Three white strikes extend from lamp to different directions to the left. Possibly these are

marko riikonennoreply@blogger.com5tag:blogger.com,1999:blog-20777850.post-36261903349894551682007-11-08T20:32:00.000Z2008-12-11T18:12:17.157Z

The winter in Lappland was two weeks late but when it finally arrived last weekend, along came the diamond dust. Decent displays were seen here in Rovaniemi on two nights and one day. In the night time I used a bright lamp to create the halos. The photo here is from the second night showing the anthelic region with diffuse arcs. More photos, including all sky views, will follow some time later

marko riikonennoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-16003928447903541092007-11-07T07:44:00.000Z2008-12-11T18:12:17.285Z

A funny coincidence that a halo-observer may want to experience is travelling to Egypt and seeing some pyramidal crystal halos.This odd-radius display was photographed by Márk Laczkó of Budapest, Hungary somewhere over the southern borders of Romania. He was sitting on an airplane heading towards Egypt on 27th October. When he realised they were flying in cirrus clouds, he deliberately started

Ágnes Kiricsihttp://www.blogger.com/profile/08611168432247808121noreply@blogger.com5tag:blogger.com,1999:blog-20777850.post-54539999507724083772007-10-21T16:16:00.000Z2008-12-11T18:12:19.875Z

Today on 21st October at 11:27 local time I saw this elliptical halo above Vecsés, Hungary. I was photographing Ac len and iridescent Ac clouds, when I caught sight of the display. The elliptical halo formed on the ice crystal precipitation of one of the Ac. The display lasted less than two minutes, so I really had to hurry to find a good object to shield the Sun with, and not to miss the sight

Ágnes Kiricsihttp://www.blogger.com/profile/08611168432247808121noreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-75089497439772275542007-10-21T14:14:00.000Z2007-10-21T14:40:47.565Z

On October 9, 2007, my husband and I made a trip to Austria to visit the highest mountain of that country, Mt. Großglockner (3798m). The main ridge of the alps gave a warm welcome to us with a bright and diffuse fragment of the infralateral arc. Just a little later, at a sun elevation of 33.4°, a sharply defined Parry arc formed directly above the upper tangent arc. There were only few occasions

Claudia Hinznoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-9686672879298885042007-10-17T01:08:00.000Z2008-12-11T18:12:21.538Z

After over 90 days of above 90 degree temps and no halos this half-way decent display shows it's self in high clouds. Upon leaving work I got quite a few photos. In all I got 22d halo, parhelia, upper tangent arc. bits of parhelic circle, infralateral arcs, 120d parhelia, and an upper suncave parry arc. While on the road I observed a rather bright 120d parhelion on the left side. As the patch of

Michael Ellestadnoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-59988410925455545242007-10-10T11:38:00.000Z2007-10-10T11:58:56.414Z

In the early afternoon of July 8, 2007, Reinhard Nitze could observe the most extensive halo display with 8 different halo types he had ever witnessed.The most interesting feature of the display was probably the appearing of the anthelion with Wegener´s anthelic arcs attached to it. The left part of Wegener´s anthelic arc was clearly visible to the naked eye, but in the photographs also the right

Claudia Hinznoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-36098372287503018302007-10-07T19:44:00.000Z2008-12-11T18:12:21.753Z

A visitor of my homepage emiled me this photo of a complex display that took place in Rome Georgia and the year I can't remember but it was in the early 90s and of all the halos the bright upper concave and convex parry arcs are the most interesting. This is probably the best I have seen where both upper parry arcs are visible . Other images show a bright supralateral arc as well. The person who

Michael Ellestadnoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-28808631723626718172007-10-07T19:30:00.001Z2008-12-11T18:12:22.503Z

Blue spot is the color feature of the parhelic circle occurring at the anthelic region of the sky. In addition to the blue, the theory predicts also green, but no red. Yet in several observations also red color has been reported. However, because the red has never reproduced in photos, the observations have been doubted.The image here shows two versions of a simulation of plate crystal parhelic

marko riikonennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-907780658428864792007-10-06T12:35:00.000Z2007-10-06T12:39:14.178Z

On September 6, 2007, Peter Krämer observed a relatively bright left Lowitz arc in the skies over Bochum in the German Ruhr area. The arc (picture with unsharp mask) stayed visible for about 20 minutes, stretching away upwards and downwards from the left sundog.Apart from the sundogs and Lowitz arc, there was also a faint 22°-halo visible, together with the upper tangent arc and circumzenital

Claudia Hinznoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-20021694317700404492007-10-03T19:56:00.002Z2008-12-11T18:12:23.558Z

About a year ago in Muonio, Finland, a diamond dust display produced a new halo, the 46° contact arcs. The display was shortly reported in the blog, but no simulation was shown. So here is a simulation, together with a composite of the photos that were taken by Päivi Linnansaari. The 46° contact arcs, which arise from Lowitz-oriented crystals, appear as three arcs below the circumzenith arc.The

marko riikonennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-61736454717666070992007-09-25T12:19:00.000Z2007-09-25T12:23:51.182Z

When Stefan Danner was driving home in the evening of September 12th, he saw a pair of very beautiful sundogs. After having reached home, he noticed that there were two more halos – a very rare combination of a concave and a convex Parry arc. He could watch the two arcs getting brighter and brighter by the time. The impressive phenomenon lasted about 10 minutes before it ended showing a bright

Claudia Hinznoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-27015824191597467682007-09-24T07:35:00.000Z2008-12-11T18:12:23.948Z

12th August 2007 - This day I can see interesting halo display. I trought that I could see upper tangent arc and inexpressive 22 degree halo. But the upper tangent arc was more and more brighter and lower tangent arc has not been seen. It crossed my mind that this phenomenon what i can see isn’t 22 degree tangent arc but 23 degree plate arc. I searched another pyramidal halos, but didn’t see it.

Patrik Trncaknoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-8610563329144782292007-09-19T05:34:00.000Z2008-12-11T18:12:24.392Z

The halo-season in Hungary has began in a very promising way. There were two particularly noteworthy displays this week. The first one was observed by László Henez "Felhőcske" on 16th September near Eger, Hungary. As a born halo-observer, even though he was quite unaware of what he was seeing, he took a picture of not only the sunward halos, but the anthelic side, as well, where about a

Ágnes Kiricsihttp://www.blogger.com/profile/08611168432247808121noreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-57076168900788533282007-09-18T13:40:00.000Z2008-12-11T18:12:24.665Z

With the diamond dust season soon on our doorteps, here is a tidbit from last winter. The display was seen in Kajaani on 26 February 2006. It was shortly presented in the blog, but now I made a composite which somewhat better shows the grandeur of the display. On a more technical side, the faintness of the 46 infralateral arc is noteworthy. In simulations this can be obtained with non-regular

marko riikonennoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-26534456580316484212007-09-09T17:02:00.000Z2008-12-11T18:12:24.935Z

On August 28th anthelic arcs appeared in the northern part of Finland. My coffee break was suddenly halted as watching from the window I noticed several arcs. Once outside my eye was first caught by well developed parhelic circle. Then, looking up I noticed a colourful Wegener arc. Colours were red on the bottom and blue on the upper part. In the later stage of the display I noticed faint X at

Marko Mikkilänoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-7539226199916964852007-09-02T17:02:00.000Z2008-12-11T18:12:25.175Z

Sunday, September 2nd 2007 The Hague, The NetherlandsAfter a cloudy morning, the low clouds broke up and both the sun and higher cirrus clouds became visible.The appearance of the cirrus was an indication for me, to keep a keen eye on the sky. That policy was worth-while, because a short time later, at about 11.35 C.E.S.T., a part of the Parhelic circle appeared, together with a remarkably bright

Frank Nieuwenhuysnoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-76697484343690805022007-08-16T19:03:00.000Z2008-12-11T18:12:25.402Z

14 August 2007 - At the edge of a large, smooth-structured Altocumulus bank, elliptic halos appeared at 1100, and from 1113 to 1120 UTC. In the first stage, the halo was complete and quite bright, although hardly coloured. It remainded too short to get the camera ready. In the second stage, the halo was quite bright as well, and uncoloured, and sometimes partly covered by the continuously

Jarmo Moilanennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-15418586749402936652007-08-15T01:42:00.000Z2008-12-11T18:12:25.691Z

After weeks of seeing no nice halo displays I was at work today on breaktime and I saw 22 halo and upper 22 deg tangent arc. I put my sunglasses on and I soon realized I had an odd radius display at hand. In all there was 9 deg. halo 18 deg halo and the outer halo who knows it could be 22 or 23 or a combo of both. The upper arc is convincing it looks sharp and I think it might be 22deg upper

Michael Ellestadnoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-81130063393241644982007-07-30T20:59:00.001Z2008-12-11T18:12:25.838Z

There is no denying it - stacked and unsharp masked halo image can be rather ugly. Ground objects are blurred and horizon is coated with blue glow.But the looks can be improved by taking the ground from single untreated frame. That's what is done in the upper right image. It is the same image as the upper left except for the ground.Near the horizon the clouds from the single frame dominate the

marko riikonennoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-33124568386655788202007-07-01T19:33:00.000Z2008-12-11T18:12:26.015Z

While at work on break time I noticed there were cirrus clouds in the sky and I decided to check for halos and I got three odd radius halos which were 9, 18 and 22 or 23? degree rings. I took a few photos. I unsharp masked one of them the show the halos more clearly. This was probably the only halo highlight of june but nothing super special but it beats nothing.

Michael Ellestadnoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-19078829750065685492007-06-30T19:33:00.000Z2008-12-11T18:12:26.443Z

In June when conditions for observing halos aren’t fine because of low full moon elevation, I have had my best observation ever. On cirrostratus veil devided from cumulonimbus cloud firstly appeared 9° halo and later thick halo at 22-24 area. After stacking 20 pictures, it turned out to be 23° and 24° halo. Fragments of 20° halo were not recognizable until stacking fotos. Halos were seen at the

Ondrej Vlachnoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-48554957414318918062007-06-30T19:18:00.000Z2008-12-11T18:12:26.666Z

Theese odd radii were a little bit surprising, I didn’t expect somthing like this at Asimenia beatch in Kavroz. I had been waiting for any halos for five days and the first display was directly pyramidal 18°, 20° and 23° halos. Fortunately I had a piece of welding glass because fotos I took without this protective glass was totaly unusable because of reflections. The display originated at very

Ondrej Vlachnoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-33377019129536648392007-06-11T15:01:00.000Z2008-12-11T18:12:27.475Z

Bill Burton, USGS observed nice halo display with very rare Reflected Lowitz arcs. Bill: "This photo showing an impressively bright sub-Sun and sub-parhelion was taken from the window of a commercial airliner on a flight from Anchorage to Minneapolis. I was looking down at a thin, cirrus cloud layer over the snow covered farmland of southern Canada when these wonderful halos and arcs appeared.

Patrik Trncaknoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-34193319547637969802007-05-06T19:44:00.000Z2008-12-11T18:12:28.175Z

The April 21st 2007 was undoubtely one of the best halo days in this year. Observers from all over the Czech republic enjoyed very bright 22° halo with tangent arcs and infralateral arcs.We probably observed wegener arcs and 120° parhelia, but this cannot be proven, because even fotos from Registar didn’t help us to clearly identify them. Anyway, Martin Popek saw that day very nice 46° halo and

Ondrej Vlachnoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-54286983740342705642007-05-06T19:29:00.000Z2008-12-11T18:12:28.385Z

On April 5th 2007 there was typical nice, but „dry“ cirrostratus in the sky without presence of halos. I was continously checking the sky and after 10:00 I noticed very faint halo that had unusualy wide upper part. That was very suspitious to me so I started to take photos which were after processed by Registar. You can see the result in the output picture. There are two seperated halos which I

Ondrej Vlachnoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-61264878852823004862007-05-06T15:37:00.000Z2008-12-11T18:12:28.550Z

A horrendously quiet April passed by without any noteworthy action (except Jarmo's fantastic bolid halo). Halo people were awakened from oblivion on 5th May, when a smooth cirrostratus veil crept in from west and offered plate crystals and odd radii halos. The display was seen and photographed by Ismo Luukkonen in Turku, Marko Riikonen in Helsinki (photo on the right by Marko) and Jukka

Jukka Ruoskanennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-13423049866514108072007-04-16T17:36:00.000Z2008-12-11T18:12:28.724Z

A fireball as bright as a full moon was observed in Finland 15 April 2007 at 00.13 local time. The fireball was also recorded by several fireball cameras in Finland.In Vaala, a low-light video camera operating by Jarmo Moilanen got the whole event and also something extra: parhelion (A in image) and fragment of 22° halo (B) are following the fireball!Image shown here is cropped from a single

Jarmo Moilanennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-22760006028441441682007-03-26T05:40:00.000Z2008-12-11T18:12:28.935Z

On 25th March a relatively small high-cloud area swept over Southern Finland and produced a fine halo for observers in Helsinki, Espoo, Turku and Riihimaki. In Riihimaki the upper Lowitz arc was continuously in the sky for over three hours. In addition to Lowitz, there were also pyramidal crystal halos (9 halo/column arc?, 24 lower plate arcs, 18 plate arcs), helic arc and Wegener anthelic

Jukka Ruoskanennoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-82649441553958040492007-03-07T22:30:00.000Z2007-03-08T07:19:01.313Z

On Mar/3/2007 I captured a halo display with a remote webcam in Oklahoma/USA. The camera image shows a bright parhelic circle, 120° parhelion and a rare Wegener arc forming a cross on the parhelic circle. A time lapse movie is available here: http://www.parhelia.de/storm/2007/flash/wegener.html (Flash)

Mark Vornhusennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1827104425312157632007-03-07T02:27:00.000Z2008-12-11T18:12:29.838Z

Throught my work day there was a number of halos that were coming and going. Around midday there was 22d halo, circumscribed halo, parhelic circle, and parhelia. Later on at break time I got 22 and circumscribed halos and there was a nice infralateral arc on the left and a possible lower suncave parry arc not sure on that need help to identify short piece of arc to the left of 22d halo. Before I

Michael Ellestadnoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-56829571644500534002007-03-06T09:30:00.000Z2008-12-11T18:12:30.126Z

On 23 February an another diamond dust display with odd radius halos occured in Vaala, Finland. Temperature was dropping from -29°C to -24° during my observation.A parhelic circle and circumzenithal arc were present with nice parhelia. A subsun and subparhelia were also seen as sparkling ice crystals in front of the ground.Odd radius halos labelled in this enhanced photo are A) a pyramidal heliac

Jarmo Moilanennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1173114311666292632007-03-05T17:00:00.000Z2007-03-05T18:46:15.550Z

On February 21, Wolfgang Hamburg was on holiday in the Erzgebirge, but rather had snow there. Around noon, the cirrus clouds which already had caused an unusual halo activity in Bavaria (see one thread below), arrived at his position in Mulda. So between 1 and 1.30 pm, Wolfgang Hamburg also observed unusually bright sundogs followed by a beautiful display showing Parry arc and upperLowitz arc.

Claudia Hinznoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1172763101604813912007-03-01T15:18:00.000Z2007-03-05T19:18:22.610Z

On February 20 there were a lot of cirrus shreds in the foehn area of a strong northern low pressure area. Already in the morning there appeared unusually bright sundogs and a circumzenithal arc of the same brightness in these cirrus shreds. Later also a Parry arc appeared together with parts of the parhelic circle and very bright 120°-parhelia which had an accentuated reddish rim. At 11.50 CET,

Claudia Hinznoreply@blogger.com5tag:blogger.com,1999:blog-20777850.post-1172678149567881582007-02-28T15:46:00.000Z2007-02-28T15:55:49.583Z

On the 23rd of February Harald Wochner took his obligatory view out of the dormer window towards the night sky. Immediately, he realized an unusual circle which later turned out to be a 9° halo around the moon. Right at this moment he took his Camera and tripod and went a couple of hundred meters away from his village in order to have a darker sky. He could also recognize a feeble 22° halo in

Claudia Hinznoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1171743882457114142007-02-17T19:50:00.000Z2007-02-17T21:16:55.936Z

We have now enough photographs of Moilanen arc to make some suppositions of the responsible crystal. As lower component of Moilanen arc does not seem to exist, the crystal must be well oriented. Straight upwards pointing wedge with ~ 34° angle seems to produce an arc that fits well with photographed cases both in shape and location.In the image above are given simulations of Moilanen arc and 22°

marko riikonennoreply@blogger.com8tag:blogger.com,1999:blog-20777850.post-1171728719597787802007-02-17T16:09:00.000Z2007-02-26T09:50:24.576Z

On January 26, 2007, Claudio Martinez watched and photographed a complex diamond dust halo display at the Baqueira Ski Station in the Spanish Pyrenees. Baqueira is situated at an altitude of 1850m. At about 5.30 pm CET the display showed the 22°-halo with sundogs, anextremely bright upper tangent arc, upper and lower sun pillar and the parhelic circle. Part of these was also visible in front of a

Claudia Hinznoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1171016962741555422007-02-09T10:07:00.000Z2007-02-09T10:32:23.676Z

In 8 Feb 2007 an odd radius display was produced by local heating plant plumes in -28°C temperature in Vaala, northern Finland. I photographed this display on a road about 1.5 km away from the heating plant.Odd radius halos in display were 18° halo, 23° upper plate arc, very faint 35° halo and rare pyramidal heliac arc. See arrows in a stacked and strongly unsharp masked photo shown.Pyramidal

Jarmo Moilanennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1170433068879799112007-02-02T15:35:00.000Z2007-02-02T19:14:12.056Z

On 30th january 2007 I found that local district heating plant was causing a nice diamod dust display. Temperature was -22 C and the steam crystallized immediately. Only a few hundreds meters from the plant was already aplenty of crystals, but the best was about 2 km from the plant.There I drove to a small road and got out and saw a display like never before.Parhelia were very bright, like

Marko Mikkilänoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1170380330958455892007-02-02T01:31:00.000Z2007-02-02T19:14:58.873Z

While at work on break I saw some cirrus clouds gather in the sky and I later saw a halo appear so I got my camera out of the car and my sunglasses. As the minutes passed I notice that there were three halos: 9 degree halo 18 degree halo and possible 23 degree halo. The left side of the 9 degree halo looks strange because it is brighter on one side and has a somewhat vertical look to it.When I

Michael Ellestadnoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1170363550598215892007-02-01T20:42:00.000Z2007-02-02T17:35:03.010Z

On the evening of 30th January cirrostratus clouds filled the sky and odd radius halos (9, 20 and 35) were seen in the Moonlight in Hyvinkää, Finland. The 20 and 35 halos were very weak, and couldn't be seen with naked eye. In addition to the high clouds there were good but fast moving diamond dust areas on the ground level. At times the halodisplay was a combination of cirrostratus and diamond

Jukka Ruoskanennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1168852808079180802007-01-15T09:18:00.000Z2007-01-16T18:31:49.200Z

Jaakko Tähti photographed this moderate display with Moilanen arc on 12. January 2007 in Viitasaari. "The halo display lasted for about four hours and changed constantly. It was a pity I was working inside. At times however I went to take some pics", says Tähti who used his cell phone camera for photographing. The vague double structure in the upper tangent arc seems to indicate that the display

marko riikonennoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1168082839919081902007-01-06T11:00:00.000Z2007-01-10T14:41:05.216Z

Little after midnight on the night of 5-6th January a fairly bright 22 halo and upper tangent arc appeared in high clouds. At this stage nothing implied that anything better would be on the way. However, at around 1.30 a.m. the halos arising from oriented columns had got much better and upper and lower tangent arcs strecthed out to form a circumscribed halo. Infralateral arcs and a 9 halo

Jukka Ruoskanennoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-1166033028450624572006-12-13T17:54:00.000Z2006-12-13T18:46:31.413Z

On 11th of december 2006 I saw a wonderful diamond dust phenomenon in the Wendelstein area in the altitude of ca. 1100m. It was the best in my life! I was a part of it and around me floated ice crystals with different white and coloured arcs. Directly over my head was formed an aura, the upper tangent arc I could touch and on the opposite side of the sun were some white arcs crossed in

Claudia Hinznoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1165423229474092972006-12-06T15:54:00.000Z2006-12-06T16:43:46.096Z

It is not so often to see diamond dust halos over the open sea, like here in the photograph of Pasi Snellman, taken on 5 November in Porvoo, Southern Finland. The display occurred only above the sea indicating that the open water was the moisture source for ice crystal growth. A couple of of kilometers upwind from the bridge is a small ski center, and according to Snellman snow making was under

marko riikonennoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1164147347041465432006-11-21T22:11:00.001Z2006-11-21T22:39:00.916Z

Richard Löwenherz made a cycle tour across Mongolia and while in Bajantes he witnessed a wonderful halo display. Up to 15 different types of halo (here the German halo key) were simultaneously visible. Unfortunately there are no photos because on the 10th day of the 6-week cycle tour the camera failed. However, I think, the sketch give a no less beautiful impression of the multiplicity of the

Claudia Hinznoreply@blogger.com8tag:blogger.com,1999:blog-20777850.post-1163452429217432042006-11-13T21:03:00.000Z2006-11-14T01:32:09.680Z

On Nov/11/2006 I observed a nice high moon halo display in Switzerland. Visible was a bright circumscribed halo and a infralateral or circumhorizon arc.

Mark Vornhusennoreply@blogger.com12tag:blogger.com,1999:blog-20777850.post-1163018914501855242006-11-08T18:56:00.000Z2006-11-08T23:34:41.640Z

In the evening of 4 November this lunar display graced the sky soon after sunset. Among the halo forms observed are the rare heliac arc, Tape arcs and Moilanen arc. The Moon elevation is ca. 16°.In the image the entire length of the heliac arc is visible as a beautiful loop encircling the zenith. The Moilanen arc is very intensive and appears to extend beyond the 22 degree halo. Tape arcs can be

Jari Luomanennoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-1162987000407698972006-11-08T11:47:00.000Z2006-11-08T17:26:42.636Z

To fill the weekend of diamond dust halos in Finland, Simo Romo sent photographs of a display that was seen on sunday 5. November in Jämsä. The location is not far from Himos ski center where previous night and day Mika Aho photographed good displays, so it's probable that this one also originated from snow machines.In addition to photographed halos there was also something else to be seen: "I

marko riikonennoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1162856319060886812006-11-06T21:31:00.000Z2006-11-07T00:09:10.580Z

On the evening of 30 october 2006, I saw this lunar Display in the west of France, close to Nantes. The photos were taken between 18h and 21h UT, the moon elevation was between 19 and 24 degrees.A lot of halos were visible, including 9° halo, upper and lower Lowitz arc and a bright upper suncave Parry arc.The orange colour of the sky is due to a strong light pollution. The images have been

Cyrille Baudouinnoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1162834323862269812006-11-06T16:59:00.000Z2006-11-06T19:12:15.766Z

Mika Aho was also on the halo move on saturday 4. November. He headed for the Himos ski center, where some 30 snow guns were operational. The trip was worthwhile. From skiing flanks spread an ice crystal cloud that, even though a bit unclean in appearance, presented some of the rarest halos.These rare halos are best shown in the photo on the left where several white arcs are seen crossing the

marko riikonennoreply@blogger.com6tag:blogger.com,1999:blog-20777850.post-1162831207870510882006-11-06T16:02:00.000Z2006-11-06T21:04:30.263Z

Towards the last weekend tension was rising among Finnish halo observers. It was going to be clear skies with sinking temperatures and full moon. Most of the ski centers had their snow guns running, so anticipation for diamond dust was high.On saturday, 4 November, Arto Oksanen drove to check the sitation at Riihivuori ski center. There was indeed a column crystal dominated display with upper

marko riikonennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1162568073988893322006-11-03T14:56:00.000Z2006-11-04T09:47:59.013Z

On October 26 the pupils of the Särkijärvi school near the small northern Finland town of Muonio stopped suddenly their indoor activities and rushed out - somebody had noticed a halo wonder in the sky.At the school were also excursionists from University of Lappland. Among them, Päivi Linnansaari happened to have a camera handy and took several photos of which a selection is presented here.The

marko riikonennoreply@blogger.com6tag:blogger.com,1999:blog-20777850.post-1162409476903324252006-11-01T19:00:00.000Z2006-11-03T16:17:18.370Z

Louise Emmons sent these two photos of a halo display seen on 9 October, in Noel Kempff national Park North-Eastern Bolivia. The halos are a bright circumscribed halo, a probable 46° infralateral arc and parhelic circle."It was one of the most amazing phenomena that I have seen in my life, together with a total solar eclipse with ground waves and an immense fireball", writes Emmons.The display

marko riikonennoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1162391356269826512006-11-01T14:20:00.000Z2006-11-01T14:32:28.596Z

At Oct.30 in Prague was observed rare halos. Stepanka Kosova had Lowitz arcs and 120 deg. parhelia (title photo). Lukas Shrbeny had nice 120 deg. parhelia too. I observed rare halos in two last days. At Oct.30 I seen: 9°, 20° halos and Parry suncave arc. At Oct.31 I seen: Parry suncave arc , upper and lower Lowitz arcs and probably circular Lowitz arc too. M.Popek and R.Manak seen 9° halos in

Patrik Trncaknoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1162141608483096492006-10-29T17:04:00.000Z2006-10-29T17:06:48.506Z

At Oct.28. in Czech republic I and Lukas Kosarek observed Parry arcs. I seen sunvex arc too (you see title photo) and Lukas take photos of Suncave arc. We seen nice supralateral arcs too.

Patrik Trncaknoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1161532035780639192006-10-22T15:44:00.000Z2006-10-22T15:47:15.800Z

At Oct.20. and 21. I and Roman Manak was seen Parry upper suncave arcs. At Oct.21 I was observed Lowitz arcs too. On photo is nice Parry arc by Roman. My Parry arc and my Lowitz arcs.

Patrik Trncaknoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1161186787453089202006-10-18T15:50:00.000Z2006-10-18T19:07:21.686Z

This high-sun picture by Dorothé Trompert was taken in Alice Springs, Australia, on 15 Nov 2005 13:17 LT. The solar height was 75°. Although the halo is almost circular, it is probably not the 22° halo itself. Instead, the strong peak in its intensity near the halo angle and its vivid colors indicates that it is a circumscribed halo. This observation supports my conjecture that in many of the

Günther Könnennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1160934737570965832006-10-15T17:47:00.000Z2006-10-17T16:37:09.976Z

Martin Jankovic and Lukas Kosarek from Brno (Czech rep.) observed nice lunar display with bright parhelia at Oct. 9. On photos was found clear upper and lower components of Lowitz arcs. More photos of this display are here.

Patrik Trncaknoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1160931998353636332006-10-15T17:00:00.000Z2006-10-16T10:25:37.790Z

Attila Kosa-Kiss from Salonta, Romania observed on 29th September 2006 a very interesting halo display at a sun elevation of 12°. Unfortunately, there were no photos but there is a sketch. The most probable explanation is the existence of suncave [H] and sunvex [G] Parry arcs, as shown by the simulation from Les Cowley. Other possibilities would be an circular Lowitz arc [F], as seen on the

Claudia Hinznoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1160845513866931372006-10-14T17:03:00.000Z2006-10-14T17:05:13.866Z

Very rare Tricker anthelic arc was observed in Prague by Stepanka Kosova. Stepanka seen bright anthelion with "small X". This image is stacking of three photos. It is part of nice halo display with Parry arc and 120 parhelia at Oct. 12.2006.

Patrik Trncaknoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1160845352639247942006-10-14T17:00:00.000Z2006-10-14T23:58:42.296Z

This photo show nice circular Lowitz arc. Photo was taken by Michal Nagy from Slovakia at Sep. 29. 2006. My photo possible all components of Lowitz arcs was taken in Holesov (Czech rep.) at Oct. 12. 2006.

Patrik Trncaknoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1160683351724481542006-10-12T19:51:00.000Z2006-10-16T10:26:14.900Z

At the end of September weather fronts from an ex-hurricane reached Germany. In the leading cirrus, Lowitz arcs were observed over two days. Hartmut Bretschneider in Schneeberg (Saxony) made the first sighting on 28th September. He first saw a parhelion with a Lowitz arc emanating from the parhelion when the sun was at an elevation of 14 deg. Later when the sun was higher there was a very bright

Claudia Hinznoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-1160680572533075442006-10-12T18:58:00.000Z2006-10-14T17:00:13.230Z

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.

Patrik Trncaknoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1160500806071346192006-10-10T17:17:00.000Z2006-10-10T18:08:08.763Z

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

Patrik Trncaknoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1160299685763956182006-10-08T09:23:00.000Z2006-10-10T18:08:37.600Z

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."

Patrik Trncaknoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1159969374860248492006-10-04T13:40:00.000Z2006-10-08T16:21:20.193Z

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.

Patrik Trncaknoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1159814483816739842006-10-02T18:37:00.000Z2006-10-02T18:41:23.846Z

October is probably the worst halomonth in Finland. The last chances for good high cloud displays are gone with September and diamond dust is not swaming in untill 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

marko riikonennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1159545853008972212006-09-29T15:57:00.000Z2006-09-29T16:04:13.040Z

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]

marko riikonennoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1159105867067923922006-09-24T13:28:00.000Z2006-09-25T05:58:00.776Z

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

marko riikonennoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1158599775917702362006-09-18T16:33:00.000Z2006-09-18T19:25:05.483Z

Martin Popek observed this display with Lowitz acrs on 16. September. Interesting feature is the lower Lowitz component extension above parhelion. In the simulation there is something like that, but it's very, very ghostly. The main body of the lower component below parhelion looks as if it were just a patch of 22° halo - the extension towards parhelion is missing. Same goes with the upper

marko riikonennoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-1158567013158994832006-09-18T08:04:00.000Z2006-09-18T08:10:13.176Z

On August 31, 2006, clouds moved in destroying all hopes for meteor observations in the night. The halo display in the high clouds close to sunset (1725 UT, Sun elevation approximately 3 deg) observed by Jürgen Rendtel from Marquardt (west of Berlin, 13.0 deg E, 52.5 deg N) included intense V-shaped upper tangent and Parry arcs. Another bright coloured 'spot' of about 3 deg apparent size was

Claudia Hinznoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1158413801381935462006-09-16T13:25:00.000Z2006-09-18T06:52:51.310Z

This display was captured by Jan Drahokoupil in Sardinia on 6. September. The 22° halo is surrounded by elliptical circumscribed halo. The small halo around the sun is 9° halo or 9° column arc (or both together). Simulations could give better glue. Later on the display changed and there were also 18° plate arcs.More photos here.

marko riikonennoreply@blogger.com7tag:blogger.com,1999:blog-20777850.post-1158266723839377572006-09-14T20:36:00.000Z2006-09-14T20:47:12.816Z

CIRCUMHORIZONTAL ARCMore than 100° wide above the horizon, very brilliant, for about 25 minutes.The best I have seen from Italy!Canon EOS D30.A collage of 3 images with a 35mm lens at f/8 and 1/1000 sec. 31 May 2006 12,20 LT (+2h) Viterbo - Italy

Paolo Candynoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1157789094959083062006-09-09T07:39:00.000Z2006-09-09T08:06:45.496Z

During the Czech halo observers meeting in Kuncice, high clouds created some good displays. This odd radius halo complex was seen on 14. August. It shows 9,° 18°, 20°, 22-24° and 35° halos. Judging from the non-uniform intensity distribution of some of the halos (9° and 20° halos being brightest on the sides), this display was caused by poorly oriented columnar pyramid crystals. It's also

marko riikonennoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1155761852563392622006-08-16T20:38:00.000Z2006-08-16T21:05:34.500Z

Meeting of Halo Observation Project members was in Kuncice pod Ondrejnikem (Czech republic) - beautiful landscape of hills and woods. We had very nice observations of some rare halos: Parry suncave arc, 9 halos and 18 halos, on the high clouds. See PHOTO from Martin Popek. On photo from left to right: Vladimir Odvarka, Roman Manak, Lukas Kosarek, Jan Kondziolka, Martin Jankovic, Martin Popek and

Patrik Trncaknoreply@blogger.com2tag:blogger.com,1999:blog-20777850.post-1155546486161455712006-08-14T08:36:00.000Z2006-08-14T09:08:06.210Z

Francesco De Comité took this great photo from an airplane between Brussels and Madrid in 7 August 2006 at 19h31. Unfortunately no more additional photos are available from this display.There is really well developed diffuse anthelic arcs crossing subparhelic circle. Subanthelion point is illuminated by these arcs. In this case it is clear that there is no subanthelion, since bright spot on

Jarmo Moilanennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1153653704249543812006-07-23T11:07:00.000Z2006-07-24T16:34:38.373Z

On June/3/2006 at 20:20 CEST Susanne Danßmann observed a subparhelic circle on a flight from Berlin to Zurich. The elongated spot of light in the center of the image is likely a subanthelion. The shadow on the winglet suggests the photo was taken in direction of the antisolar point. There is no shadow of the airplane in the center of the subanthelion, because the airplane was high above the

Mark Vornhusennoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-1153170215337571852006-07-17T20:15:00.000Z2006-07-19T10:46:41.890Z

Nearly thirty halo enthusiasts from all around the world gathered to Artjärvi, Finland for a weekend of avid halo discussion. Apart from Finland there were participants from the USA, Japan, Germany, Sweden, Czech Republic and Netherlands. The meeting took place in URSA Astronomical Association's new observation centre. The programme for the meeting consisted of five sessions that included 14

Jari Luomanennoreply@blogger.com10tag:blogger.com,1999:blog-20777850.post-1149881499872524372006-06-09T19:25:00.000Z2006-06-10T20:29:55.740Z

Two days (8.6.2006 and 9.6.2006) in Prague and near neighbourhood was very good for halos. The best halo display had Martin Nekola in Ondrejov, he was seen nice Wegener arcs in high Sun elevation (approximately 55 degrees) as big X on anthelion side of Sun. Web site of some next Martin´s halo photos is here.

Patrik Trncaknoreply@blogger.com14tag:blogger.com,1999:blog-20777850.post-1148071900758976002006-05-19T20:42:00.000Z2006-05-19T20:52:46.093Z

For all rare halos of the world is database now. The most contribution to database is from Finnish, Czech and German observing networks, and from acouple of active observers from USA. You can search the database in four ways: all observations, name of observer, country of observation and name of halo.You visit: http://www.halo.astronomie.cz/database.php

Patrik Trncaknoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1148052990266400932006-05-19T15:35:00.000Z2006-06-03T20:00:29.056Z

To help overcome our dearth of haloes, here is another archive picture. It was taken in the morning over Iberian Peninsula in April 1997 by Frank Wächter using a 35mm lens. It shows elliptical haloes around the subsun called Bottlinger's rings.

Claudia Hinznoreply@blogger.com3tag:blogger.com,1999:blog-20777850.post-1147991445030783212006-05-18T21:17:00.000Z2006-05-19T13:21:39.403Z

This subsun-like pillar on front of dark cloud was photographed by Jenni Elina Holopainen on 18. May 2006 in Pyytivaara, Finland. The position of the pillar is apparently the same as that of the Sun's behind the cloud, which is better revealed by the cloud rays in another photo.So how this is possible? The explanation must be a reflection of sun light from still water body and further reflection

marko riikonennoreply@blogger.com12tag:blogger.com,1999:blog-20777850.post-1147653882521598352006-05-15T00:15:00.000Z2006-05-17T01:18:01.896Z

35° plate arc in lower center, 24° plate arc above it and slightly to the right, and faint infralateral arc (?) at far left. The angular distances from the sun still need to be measured, however. Dalton Highway, northern Alaska, April 17, 2006. The photo has not been manipulated. Copyright Walt Tape.A wider angle photo of the same display is here. A photo of another display, about 20 minutes

Walt Tapenoreply@blogger.com7tag:blogger.com,1999:blog-20777850.post-1147539541623654582006-05-13T16:57:00.000Z2006-05-13T16:59:02.530Z

This image was taken in Fukushima pref. in Japan, by Mr. Tasan (handle), May 5, 2006. There are two halos -- the lower one seems a 22 degree halo, but what is the upper one? I think it can be a 24 (or 23?) degree halo, a circular Lowitz arc or a 23 degree plate arc. What are your opinions?

Yuji Ayatsukanoreply@blogger.com7tag:blogger.com,1999:blog-20777850.post-1147276423536675612006-05-10T15:38:00.000Z2006-05-14T08:12:57.586Z

This archive picture photographed Dieter Klatt on october 25th, 1996 in Oldenburg (North Germany). It shows an upper unknown arc with faint 22° halo, right parhelia and a eft fragment of parhelic circle.

Claudia Hinznoreply@blogger.com4tag:blogger.com,1999:blog-20777850.post-1147220710393445672006-05-10T00:16:00.000Z2006-05-10T06:23:25.276Z

While on break time at work I decided to check the sky and saw a 22d halo with a rather suspicious brightening that encircled the lower half of the halo. As the cloud moved on a rather bright arc appeared and I thought circuscribed halo no it was a lower 23 degree plate arc!! I could tell because there was no circumscribed halo which goes all the way around while lower 23 degree plate arc tails

Michael Ellestadnoreply@blogger.com15tag:blogger.com,1999:blog-20777850.post-1147031787021933352006-05-07T19:27:00.000Z2006-05-10T11:16:50.586Z

Yesterday, 6 May 2006, odd radius halos were observed in a large area in Eastern and Central Finland. Odd radius halos observed during the day were mainly circular halos and plate arcs.I photographed the display in Vaala, were it lasted for 3 hours. Photo shown here is made by stacking 24 photos which were taken during 10 minutes time. Unsharp mask has been used to show halo better. Visually

Jarmo Moilanennoreply@blogger.com9tag:blogger.com,1999:blog-20777850.post-1146674326897566462006-05-03T16:35:00.000Z2006-05-03T16:58:32.066Z

"Atmospheric Optics" has a newly updated section about halo forming ice crystals - check under "What's New". Plate, column and pyramidal crystals are illustrated with their orientations and resulting halos.

Les Cowleynoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1146565222142371682006-05-02T09:44:00.000Z2006-05-02T10:21:26.353Z

Following the idea of Halo reports blog, a new Atmospheric Phenomena blog has been opened by Claudia Hinz. There will be reports of of recently observed interesting atmospheric phenomena around the World. Reports will cover all other atmospheric phenomena except Halos. Halos will be reported here in Halo reports blog.Atmospheric Phenomena blog can be found here.

Jarmo Moilanennoreply@blogger.com1tag:blogger.com,1999:blog-20777850.post-1146510649564746572006-05-01T19:09:00.000Z2006-05-02T09:23:30.746Z

This picture was taken on December 10, 2005 by Wolfgang Gurgiser at the summit of the Hohe Salve (1829 m, Kitzbühler Alps, Austria) at a temperature of about -7°C. Contrary to what is usual, this halo was not caused by cirrus clouds, but by diamond dust which had direct contact to the ground. This diamond dust consisted of needle-shaped ice crystals smaller than 1 cm.Besides the 22°-halo, the

Claudia Hinznoreply@blogger.com0tag:blogger.com,1999:blog-20777850.post-1146080893294610852006-04-26T19:08:00.000Z2006-04-26T19:48:13.310Z

A long-lasting halo display was seen in Southern Finland on 25th April. The gems of the display were odd radius column arcs, of which 9, 20 and 24 degree arcs were seen. Additionally, 9 and 24 degree lower plate arcs as well as an 18 degree halo and possibly a 23 degree upper plate arc were visible for a short period of time during the day. The duration of the display was spectacular; for

Jukka Ruoskanennoreply@blogger.com7tag:blogger.com,1999:blog-20777850.post-1145800619623788722006-04-23T13:44:00.000Z2006-04-23T16:16:57.160Z

Predominantly incomplete but brightly colored elliptical halos over Deventer, the Netherlands on Sunday 23/4. The display occurred in two stages, the first performing one elliptic halo section (vertical radius app. 5degs) from 1030-1037 UT, the second from 1048 to 1100 UT, during some minutes including a fainter and smaller but complete inner elliptic halo (vertical radius app. 3degs). By the

Peter-Paul Hattinga Verschurenoreply@blogger.com10tag:blogger.com,1999:blog-20777850.post-1145676185002217742006-04-22T03:12:00.000Z2006-04-22T09:58:36.826Z

This fairly decent high-sun display was captured while I was on lunch break. Although there were no rare halos but there was 22d halo, circumscribed halo, smooth complete parhelic circle, and faint circumhorizon arc. The best part in my opinion was the parhelic circle. I have applied unsharp mask to bring the halos out better. Photos were taken on the 11th.

Michael Ellestadnoreply@blogger.com4