What Causes a Tsunami?

Answer

A sudden movement on the ocean floor, such as an earthquake or an eruption of a volcano is what causes a tsunami. The big wave travels across the open ocean and just gets stronger and bigger.
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Ask.com Answer for: what causes a tsunami
Tsunami are large waves caused by sudden movement of the ocean due to earthquakes, landslides, large volcanic eruptions or meteorite impact in the ocean.
Many things could cause a tsunami to start. A few examples of this are, underground volcano eruptions or even an earthquake could start one.
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