Question

Write a brief note on Tsunami.

Answer 1

Hint:
> It is a natural catastrophe triggered by the eruption of volcanoes in the beds of the seas.
> It is reflected and refracted by the topography of the seafloor near shore and the configuration of a coastline, much as any other water waves.
> Tsunami waves can run over deep waters as quickly as jet planes, only slowing down when shallow waters are reached.

Complete answer:
Tsunami is a natural phenomenon generated by strong earthquakes, volcanic eruptions, landslides, or simply a comet or a meteor impact in the ocean, and is a sequence of fast-moving waves in the ocean. A tsunami has a wavelength which is very long. Hundreds of kilometres can belong.

This disaster is also known as a seismic flood surge or tidal wave, a destructive ocean wave typically caused by a submarine earthquake, an underwater or coastal landslide, or a volcanic eruption. For such a wave, the term tidal wave is often used, but it is a misnomer since the wave has no relation with the tides.

It can also be caused when the earth's crust is struck by a meteorite, but it is extremely rare. In the Pacific Ocean, a tsunami generally occurs, especially in what is called the ring of fire, although it can occur in any large body of water.

It is not preventable. There are ways of trying to save people dying from a tsunami, though. Before the big waves hit the shore, international and regional warning systems, especially for the Pacific Ocean, issue warnings. Since it is possible to sense the earthquake that triggered the tsunami before the wave comes to the sea, it is possible to alert people to go somewhere safe.

Note
The deadliest known tsunami in recorded history occurred on 26 December 2004 and is known as the Indian Ocean Tsunami of 2004. An earthquake-triggered it. The earthquake had a magnitude of 9.3 on the Moment of the magnitude scale. About 215,000 people died as a result of this tragedy, mostly on the coasts of the Indian Ocean.

Tsunamis are very strong and can go inland for several kilometres. The water appears to go down by an odd distance about 5 to 10 minutes before a wave strikes. This is a warning that a tsunami could happen.

Climbing to an elevated location is the safest place to evacuate. If a human sees odd or irregular animal activity, he/she may also take it as a warning and go home.