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Cascadia Subduction Zone

Cascadia Subduction Zone

The world’s largest earthquakes occur along subduction zones, geologic hot spots where one of earth’s tectonic plates is slowly being forced underneath another. These plates stick, causing a buildup of stress, which is periodically released through massive earthquakes. These are not your run-of-the-mill 15-second San Andreas Fault earthquakes. These magnitude 8+ megathrust earthquakes shake the earth for four to six minutes and are followed by tsunamis and numerous aftershocks.