Why do tsunamis occur?

Answer

The most common cause of tsunamis is from undersea earthquakes on the ocean floor. Submarine landslides and volcanic eruptions also cause tsunamis. On very rare occasions, a meteorite impact in the ocean results in a tsunami. Any event that displaces a significant amount of water in a short period of time can cause a tsunami.

Not all undersea earthquakes cause tsunamis. The quake must cause part of the crust to lift up like a gigantic paddle, displacing a large volume of water. If the quake happens deep in the crust or the crust is not displaced significantly, then a tsunami is not likely to occur. Strong, shallow quakes produce more tsunamis. Tsunamis are difficult to detect on the open ocean since the wave does not rise very far above the ocean's surface. As the tsunami approaches shallower water, the water piles up and causes a much taller wave.

Volcanic eruptions also cause tsunamis, such as the waves produced when the Indonesian volcano Krakatoa erupted in 1883. Superheated gas and rock from the volcano flowed into the sea, which displaced a huge volume of water and caused tsunamis. These waves were felt as far away as South Africa. Many villages were destroyed by these waves, and more than 36,000 people died.

Q&A Related to "Why do tsunamis occur?"
Tsunamis occur when a large underwater event generate a monstrous tidal wave capable of reaching heights over 100ft (30m) and threaten countless coastal communities. Tsunami warning
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The tectonic plates move and shift causing a movement in the water and drawing all the water back and then pushing it straight forward wiping everything out in its path. I would say
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Easy man!What world are you in?They occur because of earth-quakes in the ocean!Yay u just learnt sumthing which gave me 2 points!Thank-u!
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Most tsunamis occur in the Pacific Ocean since it is the hotbed of
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1 Additional Answer
Ask.com Answer for: why do tsunamis occur
Tsunami are large waves caused by sudden movement of the ocean due to earthquakes, landslides, large volcanic eruptions or meteorite impact in the ocean.
Most tsunami are caused by large earthquakes on the seafloor when slabs of rock move past each other suddenly, causing the overlying water to move.
Explore this Topic
Tsunami's can occur due to earthquake's, landslides on the sea floor, land slumping into the ocean, or from large volcanic eruptions. Most of them are caused ...
The last tsunami occurred in Samoa Islands in September 2009. This was caused by an 8.0 earthquake. Thousands of people were affected by this tsunami. ...
When a tsunami is in the deep sea it is only about 3 feet tall. Once it hits the coast it can be up to 100 feet tall. Most tsunamis occur in the Pacific Ocean. ...
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