Sunday, 19 October 2008

Long lasting column and plate halos with Lunar Wegener arc

After over a month of no halos I got bombarded by a serious halo series that started after I clocked out of work to go home, and before getting into the car I started firing away with my Nikon D-100. Through the duration the halos observed were 22° halo, upper and lower tangent arcs, fine upper suncave parry arc, bright parhelia with lowitz arcs, very long parhelic circle, 120° parhelia, a fine CZA, supralateral arc, and infralateral arcs ( 1 - 2 - 3 - 4 ). At sunset upper sunvex parry arc was observed and ended with a bright red tangent arc after the sun had set.

The show was not over yet because the Moon came up and there was 22° halo, upper tangent arc with parry arc, supralateral arc and CZA ( 5 ). Later on I looked away from the Moon to see bright and complete parhelic circle and very bright 120 degree parhelia ( 6 ). I also got to see blue spot very clearly ( 7 ). When the Moon got high enough for the circumscribed halo and Parry to merge I continued to shoot photos. Now here's the real shocker: the next day I looked at the batch of these lunar halo photos and I found a Wegener arc ( 8 )! I could not believe it. I also looked for heliac because the Parry arc got quite bright ( 9 ) but it was not to be found.


  1. Congratz !! Quite a complex dispaly you got over there. I'd like to see full rez images. No stacks available ?

  2. Yeah. But I seem to see blue spot much better in photo number 6. So it was well visible to naked eye?

  3. Wonderful display! Very Lowitz-like stuff in the first few photos (during the solar halo).

  4. Gotta echo the other comments. A very nice display.

  5. Thanks all of you for your comments!:)

    I did do a stack set on a weak convex parry but I have not stacked it yet but will get on it. The blue spot yes I could see it because the CZA was there and beyond the 120d parhelion you can see the PHC fade. The lowitz was nice I see lowitz and parry arcs quite often during big displays in Ohio USA. In the night display in photo 6 you can see possible arcs coming downward from the 120d parhelion.

    Marko Krusel I would send the full-size image but since I have the ancient dial-up it takes a while to upload