22° Circular Solar Halo seen at Singtam sky

27.09.19: So to see a Sun Halo or Sun Rainbow…you need high, thin cirrus clouds which are usually at altitudes above 20,000 feet. These clouds are usually a sign of thickening clouds and a chance for rain. These high altitude cirrus clouds are made of mostly ice crystals which refract the sunlight much like a prism will showing the colors of a rainbow.

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