Define Tsunami.
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Answers
Explanation:
a very large wave in the sea which destroys things when it reaches the land, and is often caused by movements under the surface of the earth.
Answer:
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.About 80 percent of tsunamis occur in the Pacific Ocean, caused by earthquakes along the edges of the undersea tectonic plates known as the Pacific Ring of Fire.
In the past, tsunamis were sometimes called “tidal waves.” But that name fell out of favor because the waves have nothing to do with ocean tides.