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How Fast Do Tsunamis Travel Across The Ocean. Locally generated tsunamis can reach coastlines in just minutes. Once generated, a tsunami wave in the open ocean can travel with speeds greater than 800 kilometres an hour (500 miles an hour).

PPT Tsunami PowerPoint Presentation, free download ID
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Tsunamis often exceed 100 miles in length in the deep ocean, where they can travel as fast as 500 miles per hour, crossing the entire pacific ocean in less than 24 hours. Locally generated tsunamis can reach coastlines in just minutes. In the deep ocean, a tsunami can travel at more than 900 kilometers per hour.

PPT Tsunami PowerPoint Presentation, free download ID

These waves can travel across the pacific ocean in less than one day. In deep water, the top of the wave rarely reaches more than three. Since the average depth of the pacific ocean is 4000 m (14,000 feet) , tsunami wave speed will average about 200 m/s or over 700 km/hr (500 mph). Tsunami nears land, loses speed, gains height.