From: Andrew Johnson
Date: 2006-07-30 12:19:39
Attachments : Claim: Photograph shows a “fire rainbow” over Idaho. Status: True. Example: [Collected via e-mail, 2006] THIS IS A FIRE RAINBOW THE RAREST OF ALL NATURALLY OCCURRING ATMOSPHERIC PHENOMENA. THE PICTURE WAS CAPTURED ON THE IDAHO/WASHINGTON BORDER. THE EVENT LASTED ABOUT 1 HOUR. CLOUDS HAVE TO BE CIRRUS, AT LEAST 20K FEET IN THE AIR, WITH JUST THE RIGHT AMOUNT OF ICE CRYSTALS AND THE SUN HAS TO HIT THE CLOUDS AT PRECISELY 58 DEGREES. Origins: This is a real photograph of an atmospheric phenomenon known as a circumhorizon(tal) arc, the example shown above was captured on camera as it hung for about an hour across a several-hundred square mile area of sky above northern Idaho (near the Washington border) on 3 June 2006.
