![]() ![]() ![]() A large landslide triggered a tsunami in Shoup Bay near Valdez. Local tsunamis Local tsunamis were generated by landslides crashing into bays and fjords. It was generated by movement on the ocean floor. It killed people in Hawaii when the waves came ashore. Ocean wide waves The main tsunami that swept across the Pacific Ocean. There were two types of waves generated during the earthquake. Two types of waves Ninety percent of the people that died in the 1964 Alaska earthquake were killed by tsunamis. The land around the town of Portage subsided approximately 3 meters (9 feet).Ĭlick for More Information and to Order Tsunamis generated by the earthquake Parts of Montague Island were uplifted 4-9 meters (12 to 36 feet). Crustal plate movementĬrustal plate movement The Pacific Plate moved underneath the North American Plate an average of 27 feet (9 meters) during the earthquake. The crust of southern Alaska was compressed and warped due to plate movement prior to the great earthquake after the plates locked together. Pacific Plate subducting beneath the North American Plate The area where the earthquake occurred is a subduction zone where the Pacific Plate is subducting beneath the North American Plate. The late afternoon quake spared many lives because schools were closed and few people were shopping on Good Friday. The distance from the Prince William Sound to Anchorage is 101 miles. The epicenter was six miles (10 kilometers) east of College Fiord in the Prince William Sound. Damage in downtown Anchorage, USGS Earthquake epicenter ![]()
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