'Rare' Rotating Ice Disk Returns to Westbrook, Maine

A spectacular rotating ice disk formed in a river in Westbrook, Maine, video filmed by the City of Westbrook shows.

Drone video filmed by the City of Westbrook between January 11 and 13 shows the formation on the Presumpscot River, against a backdrop of the city’s snowy landscape.

The viral disk made its first appearance in 2019 before partially forming again in 2020, according to local news reports.

Ice disks are a fairly rare phenomenon that form as a result of a river’s structure and temperature conditions, according to Chris Horvat, a postdoctoral researcher at Brown University. Credit: City of Westbrook via Storyful