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fire rainbow
a fire rainbow seen while hiking, also known as horizontal rainbows. scientific name is horizon-al or horizontal arc
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Comment by James S on November 6, 2009 at 8:50am -
fire rainbow quick facts :
1) only form in cirrus clouds that are above 20,000 feet.
2) sun has to be at 57.8 degrees or more above the horizon
3) ice crystals in the cloud have to aligned exactly horizontally to the sun's rays
4) really a halo effect
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