Atmospheric phenomena
This category contains images of atmospheric phenomena. Most of them where captured with sky surveillance cameras.Click on the images to see a larger version with description.
Auroras
Aurora display on May 11, 2024
Clouds
Unusual or spectacularly illuminated clouds.
Noctilucent clouds on Jun 16, 2020
Sunset on Jan 31, 2020
Sunset on Dec 17, 2019
Noctilucent clouds and blue phenomenon on Jun 21, 2019
Noctilucent clouds on Jun 17, 2019
Noctilucent clouds in the night from Jun 13 to 14, 2019
Sunset on Nov 23, 2017
Iridescent lenticular clouds on Sep 27, 2017
Sunrise on Nov 22, 2016
Sunrise on Nov 18, 2016
Halos
Halos are caused by reflection of sun light or moonlight on ice crystals. Depending on the shape of the ice crystals, their orientation and their rotation different types occur. If internal reflection occurs, light is also refracted and split into colors due to dispersion. These types of halos are colored.
Rainbows
Unusual rainbows.
Red rainbow on Jan 8, 2020
Red rainbow on Nov 3, 2019
Moonbow on Aug 11, 2017
Red rainbow on Aug 11, 2017
Monitor calibration
For optimal display, the monitor should be calibrated so that as many shades of the grayscale shown below are distinguishable. At least the 4% steps should be separated by every monitor. The 2% steps are visible on better monitors. To distinguish the 1% steps, a HDR monitor is required.
