The Alaska-Aleutian megathrust is a thrust fault that runs for 3,600 km from near Kamchatka in the west to the Gulf of Alaska in the east. It forms the interface between the subducting Pacific Plate and the overriding North American Plate. Movement on the megathrust has been responsible for several great historical earthquakes including the M 9.2 1964 Alaska earthquake, M 8.7 1965 Rat Islands earthquake and the M 8.6 1957 Andreanof Islands earthquake, each of them triggering large tsunamis.
- Earthquake Hazards Program: http://earthquake.usgs.gov/hazards/products/ak/1999/documentation/
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