n into the Earth's interior and causes stress to build up. Finally, the locked zone caves in. Parts of the seafloor snap upward and some areas sink downward as the tension is being released. Immediately after the earthquake the shape of the sea surface mimics the seafloor; but not for long. Gravity begins to take control and tries to return the sea surface back to its original shape. As this occurs, the ragged sea begins to race out. At that moment a tsunami is born. "Once generated, a tsunami behaves similarly to a wave produced by dropping a pebble into a shallow pond" (Ocean World Encyclopedia, "Tsunami"). The waves begin to radiate in circles widening more and more each time. In deep water tsunami waves are usually "two feet high, can measure over 100 miles from crest to crest, and can travel at the speed of 500 nautical miles per hour, the speed of a jet airplane" (Ocean World Encyclopedia, "Tsu
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