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surging glacier
a glacier that experiences a dramatic increase in flow rate, 10 to 100 times faster than its normal rate; usually surge events last less than one year and occur periodically, between 15 and 100 years.
Image
In 1941, Hole-in-the-Wall Glacier surged, also knocking over trees during its advance.
World Data Center for Glaciology, Boulder, CO
Topic(s):
glaciers