What is a tsunami? Detailed answer

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What is a tsunami? Detailed answer

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What is a tsunami?

Tsunamis are sea waves of very large length, arising mainly as a result of the up and down shift of extended sections of the seabed during underwater and coastal earthquakes.

The distance between neighboring wave crests during a tsunami can be from 5 to 1500 kilometers, the waves propagate at a speed of 50 to 1000 kilometers per hour. The height of the waves in the area of their occurrence ranges from 10 centimeters to 5 meters, but near the coast it can reach from 10 to 50 meters or more.

One of the most destructive tsunamis took place in 2004. Originating in the Indian Ocean, it hit the coasts of Indonesia and Sri Lanka in gigantic waves, claiming more than 300 human lives.

There is a known case in 1994, when the tsunami was caused by the collapse of a dock in the sea in the American port of Skagway (Alaska). Then the wave height reached 11 meters, one person died.

Author: Kondrashov A.P.

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