Ice calving is a form of ice ablation or ice disruption. It is the sudden release and breaking away of a mass of ice from a glacier, iceberg, ice front, ice shelf, or crevasse.
Calving of glaciers is often preceded by a loud cracking or booming sound before blocks of ice up to 200 feet high break loose and crash into the water. The entry of the ice into the water causes large, and often hazardous wakes.
The entry of the ice into the water causes large, and often hazardous wakes. The wakes formed in locations like Johns Hopkins Glacier can be so large that boats cannot approach closer than two miles. These events have become major tourist attractions in locations such as Alaska.
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