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Subduction zones are found where one plate overrides, or subducts, another, pushing it down into the mantle where it melts. An example of a subduction-zone plate boundary is found along the northwest coast of the United States, western Canada, and southern Alaska and the Aleutian Islands. Subduction zones are characterized by deep-ocean trenches, shallow to deep earthquakes, and mountain ranges containing active volcanoes.

Today in Earthquake History

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August 22, 1949
M 8.1, Queen Charlotte Island – Canada's largest historic earthquake since 1700. The shaking was so severe on the Queen Charlotte Islands that cows were knocked off their feet,… Read More

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