2017-08-20, Austria, Photo: Karl Kaiser
Halo Phenomena- Column display with a magnificent Wegener arc from southern Alaska, July 9th, 2023
- “Randomized Moilanen half circle halo“ observed again in Ore Mountain Range diamond dust hotspot
- Identifying light sources responsible for “floating” pillars
- Odd radius halos observed in Schwedt (Germany), June 09th, 2018
- Double the fun: Appearance of the 22° halo during a total solar eclipse
- The Fichtelberg halo display from December 18th, 2017
- Moilanen arc observations from Davos
- Diamond dust halos on December 2nd, 2017 at the Fichtelgebirge
- Diamond dust halos on December 2nd, 2017 at the rim of the Ore Mountains
- Moving Ripples in a sundog
Atmospheric Phenomena 
The picture from Austria with the whitish stripes in the dark blue sky are so-called noctilucent clouds in the stratosphere, also known as NLCs.
Check this here:
https://forum.meteoros.de/viewtopic.php?f=34&t=58780&start=60