Ice shove in the US State of Wisconsin in March 2009
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 an iceberg. Witnesses have described the shove's sound as sounding like a train or thunder. Ice shoves can damage buildings and plants that are near to the body of water.