A tsunami is a series of waves generated by a disturbance on the ocean floor. This disturbance can be caused by earthquakes, landslides, volcanic eruptions, explosions or meteorites. The waves have very long wavelengths,... More »

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The formation of a tsunami is a direct result of underwater earthquakes. The energy released during underwater earthquakes is transferred to the water, moving it upward and creating huge waves. More »

Tsunamis happen when earthquakes, landslides or volcanic eruptions disturb the ocean floor. Most tsunamis occur when there are earthquakes at tectonic plate boundaries. When the ocean floor at the boundary rises or falls... More »

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Tidal waves are shallow water waves caused by the gravitational interactions from the sun, moon and Earth, and tsunamis are large ocean waves triggered by volcanic eruptions, landslides and large earthquakes under the oc... More »

Tsunamis, giant waves that sometimes travel across entire oceans, are triggered by underwater earthquakes or volcanic eruptions. In the open ocean, tsunamis can be barely noticeable, but as they approach land, the waves ... More »

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The Asian tsunami was the most deadly in recorded history and lasted for 7 hours on December 24, 2004, beginning when the first waves struck northern Sumatra in Indonesia. More »

The waves of the Indian Ocean tsunami of 2004, caused by the Sumatra-Andaman earthquake, originated in the open ocean located to the west of Sumatra in Indonesia, where the event claimed 130,736 lives. Other hard-hit cou... More »