what is a tsunami? ans in brief!
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Answers
Tsunamis are giant waves or rapid rises in sea level. They’re rare events, occurring on average about twice a year somewhere in the world about once every 15 years for the most destructive tsunamis, which can cover an entire ocean basin.
Tsunamis travel at speeds of up to 500 miles an hour in the open ocean and rise to heights of several hundred feet as they come ashore. They can cause widespread devastation in coastal areas especially in the aftermath of a large earthquake.
Tsunami means “harbor wave” in Japanese. Because the undersea earthquakes that trigger most tsunamis are relatively common off Japan's coasts, it is especially vulnerable to these coastal disasters.
Other vulnerable areas include Alaska, the Pacific Northwest and Hawaii.
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A tsunami is a series of very high waves created by some disturbances under the sea, such as underwater earthquakes, volcano eruptions or landslides