Tsunami

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Tsunami wave
giant waves caused by earthquakes or volcanic eruptions under the sea
Pacific Tsunami Warning System
26 nations headquartered in Hawaii, maintains a web of seismic equipment and water level gauges to identify tsunamis at sea
oceanic crust
earths crust located under the ocean
continental crust
The portion of the earth's crust that primarily contains granite, is less dense than oceanic crust, and is 20-50 km thick
fault
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
earthquake
The shaking that results from the movement of rock beneath Earth's surface.
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