A sequence of long waves commonly generated by rapid displacement of water, including by earthquakes and landslides.
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A tsunami is a series of ocean waves with very long wavelengths caused by large-scale disturbances of the ocean, such as underwater earthquakes, volcanic eruptions, or landslides. Unlike regular ocean waves that are generated by winds and are typically limited to the surface of the water, tsunamis can travel across entire oceans and reach immense heights and speeds. When a disturbance displaces a large volume of water, it creates waves that can propagate outward in all directions.