Halo Formation above Cadini di Misurina, Italy

March 05, 2020

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Photographer: Giorgia Hofer 
Summary Author: Giorgia Hofer 

The halo complex featured above was captured above Cadini di Misurina in Italy, on January 25, 2020. The weather forecast for this midwinter day didn’t seem favorable for atmospheric optics, but I’ve learned that even when the weather is unfavorable, it’s always best to make sure my camera is with me. Before the poor weather set in, limited sunshine and oriented ice crystals, composing cirrus clouds, put on a memorable show.

The vivid colorful strip at top-center is a circumzenithal arc; bright sundogs flank either side of the Sun (both with extended tails); tangent to the circumzenithal arc and curving toward the surface is a much fainter supralateral arc, and between this arc and the Sun is a suncave arc or Parry arc.

Photo Details: Camera: Canon PowerShot G7 X Mark II; Software: Adobe Photoshop CC 2015 (Windows); Exposure Time: 0.0005s (1/2000); Aperture: ƒ/11.0; ISO equivalent: 125; Focal Length: 8.8mm.