Large Spinning Ice Disk Forms on Presumpscot River in Southern Maine

A large rotating ice disk formed on Presumpscot River in Westbrook, Maine, on January 11.

Drone video shot by local man Patrick Bonsant on January 12 shows the disk gently spinning in the river’s flow against a backdrop of Westbrook’s snowy landscape.

The disk first appeared in 2019 before partially forming again in 2020, according to local media.

Ice disks are a 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: Patrick Bonsant via Storyful