Four out of five earthquakes in the United States occur in Alaska.The damage totaled about $300 million in 1964 dollars ($2.3 billion in 2013 dollars).If the energy of a magnitude-5 earthquake is like snapping a single spaghetti strand, then a magnitude-9.2 earthquake releases enough energy to snap 800,000 spaghetti strands, according to the U.S.The new size estimate is magnitude 9.2, the second most powerful ever recorded. The moment magnitude scale, a better measure of seismic power, has since superseded the Richter scale. The earthquake initially had a magnitude of 8.5 on the Richter scale.Oscillations in the height of water in wells were reported as far away as South Africa. Seiche waves, sloshing of water back and forth in a small body of water like a boat harbor or swimming pool, were noted as far away as Louisiana, where a number of fishing boats were sunk.
The world rang like a bell for several weeks from the earthquake waves.The tallest tsunami wave height was 219 feet (67 m) in Shoup Bay in the Valdez Inlet.Several towns and villages were moved to safer ground after the tsunamis, including Seward, Valdez, Girdwood and Chenega.The only building that survived the wave intact was the schoolhouse, built 100 feet (30 meters) above sea level. In Chenega, 25 of the village's 76 residents drowned in a tsunami.Most were killed by tsunamis triggered by underwater landslides, not by the earthquake-induced tsunami. Of the 131 people killed during the earthquake, 119 died in tsunamis.
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