An ice shove, ivu, or shoreline ice pileup is a surge of ice from an ocean or large lake onto the shore. They are caused by ocean currents, strong winds, or temperature differences pushing ice onto the shore, creating piles up to 12 metres (40 feet) high.

Some have described them as “ice tsunamis”, but the phenomenon works like a glacier.

Witnesses have described the shove’s sound as being like that of a train or thunder. Ice shoves can damage buildings and plants that are near to the body of water.

Top photo via KSHB.
Video is from Mille Lacs Lake, Minnesota in the morning of November 5th of 2013.
Quoted text via Wikipedia.