Today in History March 27, 1964, A massive earthquake measuring 9.2 on the Richter scale, rocks the south of Alaska on Good Friday. The quake was centered 12 miles north of Prince William Sound and affected more than 300,000 square miles of U.S., Canada, and international territory. Fifteen people were killed or fatally injured by the three-minute-long shaking.
The tsunami that followed the quake killed another 110 people and sent waves that reached 219 feet high in Shoup Bay in the Valdez Inlet.
The quake is the most powerful earthquake ever recorded in U.S. history. The seismic blast was so powerful that the cities of Seward, Valdez, Girdwood, and Chenega had to be moved to higher ground after the tsunamis.