The display occurred on 18 of March and I observed it from Vilnius, Lithuania.
For the whole day, cirrostratus clouds covered the entire sky. The clouds were moving eastward and also sublimating.
I started observing at 10:25 EET. At that time there were already odd radius halos present: with the naked eye, you could definitely notice both the 9° and 18° halos.
At 11:45, only the 9° halo was present, and at 12:00 the odd radius halos disappeared. After that, and until around 17:00, there were a faint 22° halo and tangent arc visible.
I photographed the halos in raw format with a DSLR camera. After enhancing the images, a 35° halo became visible, but I was surprised the most to see a ring between 9° and 18° halos, which appeared to be a 13° halo. After sending the images to The Halo Vault, I got a confirmation about this from Nicolas Lefaudeux and the Halo Vault team.
Here are some pictures from the display, last two of them in the sequence were processed by Nicolas Lefaudeux:
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| (All images copyright Donatas Gražulis) |
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| (Image processed by Nicolas Lefaudeux) |
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| (Image processed by Nicolas Lefaudeux) |
A similar feature appears in an older photograph that I took on 25 of June 2019. This is the only photo from that day that this appears in; it was taken with a phone:
- Donatas Gražulis
