Why is "Circumzenithal arc" trending?
Latest news, Wikipedia summary, and trend analysis.
Trend Analysis
- Ranking position: #
- Date: 2026-03-18 10:10:29
This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
Based on Wikipedia pageviews and search interest, this topic gained significant attention on the selected date.
Trend Insight
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Wikipedia Overview
The circumzenithal arc, also called the circumzenith arc (CZA), the upside-down rainbow, and the Bravais arc, is an optical phenomenon similar in appearance to a rainbow, but belonging to the family of halos arising from refraction of sunlight through ice crystals, generally in cirrus or cirrostratus clouds, rather than from raindrops. The arc is located a considerable distance above the observed Sun and at most forms a quarter of a circle centered on the zenith. It has been called "a smile in the sky", its first impression being that of an upside-down rainbow. The CZA is one of the brightest and most colorful members of the halo family. Its colors, ranging from violet on top to red at the bottom, are purer than those of a rainbow because there is much less overlap in their formation.
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Trending Topic Today
Search Interest Perspective
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That upside down rainbow you saw this week is called a circumzenithal arc - WRAL
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Circumzenithal arc over Michigan - EarthSky
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Upside-down rainbow seen on Appledore Island - Seacoastonline.com
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Lauren's Science Corner: Circumhorizontal Arc - CBS News
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A smile in the sky. 🌈✨ LOOK: An upside-down rainbow, or a circumzenithal arc, as seen from Rosario, Batangas on Thursday, July 16. Photos from Cyreen Joyce Dimailig Veraque Got any interesting posts or inspiring stories to share? Send us a message at ht - facebook.com
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My Weather Watchers: Nick Miller - BBC
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A rare sky over northern Idaho - EarthSky
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Southwesterner captures not one, but two atmospheric abnormalities on camera - DiscoverMooseJaw
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Upside down 'rainbow' spotted in Essex sky - BBC
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Incredible upside-down rainbow stuns public just hours after spectacular blood moon - The Mirror
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Yorkshire's 'upside-down' rainbows - BBC
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The science behind a rare upside down rainbow spotted in Welsh skies - Wales Online
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Where's the pot of gold? Breathtaking photos show upside-down rainbow in skies above Cambridgeshire - Cambridge News
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'˜Why's the rainbow upside down grandma?'...So why was it? - Melton Times
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Do not adjust your screen ... this rainbow really is upside down - Oxford Mail
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Did you see this 'upside-down rainbow' in the Newcastle sky? - Chronicle Live
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The reason behind the upside down rainbow spotted in sky over Hull - Hull Live
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Met Office explains reason behind rare 'upside-down rainbow' seen over Hull - Hull Live
Why This Topic Is Trending
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Search Interest & Related Topics
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