Perfect Round Circle Fount on US River

10.01.2017

American photographer Cailin Messer managed to capture on video the unique phenomenon, a huge and perfectly flat circle of ice on the Snoqualmie River in Washington State.

According to the photographer, while she was shooting a circle slowly rotated, emitting rumbling sounds. Gradually, the small fragments of ice broke away from it.

This phenomenon, called an ice disc, is observed in nature very rarely. The diameter of the largest of these circles was about 17 meters.