[peaceandlove]

12/18/2008 CLOUD WAVES ~ Nice Repetitive Pattern

This morning in Norway, a bank of nacreous clouds rolled over the city of Trondheim. "They were very colorful (almost like auroras)," says onlooker Ivar Marthinusen, who sent this photo. Nacreous clouds are located in the stratosphere some 9 to 16 miles high. Their iridescent"mother of pearl" colors come from sunlight striking tiny ice crystals inside the clouds. Very low temperatures near -85o C are required to form the crystals, which is why nacreous clouds are seen mainly during winter over places like Alaska, Iceland and Scandinavia.

Source: http://spaceweather.com/