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  1. Dictionary
    tsunami
    /(t)sʊˈnɑːmi/

    noun

    • 1. a long, high sea wave caused by an earthquake or other disturbance: "the loss of human lives from this latest tsunami is staggering"

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  2. www.britannica.com › science › tsunamiTsunami | Definition, Meaning, & Facts | Britannica

    3 days ago · A tsunami is a catastrophic ocean wave, usually caused by a submarine earthquake, an underwater or coastal landslide, or a volcanic eruption. Learn how tsunamis are generated, propagated, and affected by the topography of the seafloor and the coastline.

    • The Editors of Encyclopaedia Britannica

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  4. en.wikipedia.org › wiki › TsunamiTsunami - Wikipedia

    As the tsunami approaches the coast and the waters become shallow, wave shoaling compresses the wave and its speed decreases below 80 kilometres per hour (50 mph). Its wavelength diminishes to less than 20 kilometres (12 mi) and its amplitude grows enormously—in accord with Green's law.

  5. oceanservice.noaa.gov › facts › tsunamiWhat is a tsunami? - NOAA's National Ocean Service

    A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions. Learn how tsunamis travel, how they affect different ocean depths, and why they are not tidal waves.

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  7. sciencenotes.org › what-is-a-tsunami-definitionWhat Is a Tsunami? Definition and Explanation

    Aug 23, 2023 · A tsunami is a giant wave or series of waves produced by an earthquake, volcano, or other event that displaces a large amount of water. Learn about the causes, characteristics, effects, and mitigation of tsunamis from this web page.

  8. tsunami.ioc.unesco.org › en › what-are-tsunamisWhat are tsunamis? | Tsunami Programme UNESCO-IOC

    Learn the definition, causes, types and risks of tsunamis, a series of enormous waves created by disturbances near or below the ocean. Find out how to prepare and respond to tsunami alerts and warnings.

  9. spaceplace.nasa.gov › tsunami › enWhat Is a Tsunami? | NASA Space Place – NASA Science for Kids

    Sep 17, 2024 · A tsunami is a large wave caused by movements in Earth's crust, such as earthquakes or volcanoes in the ocean. Learn how tsunamis form, how they can be dangerous, and how NASA satellites watch for them.

  10. www.nationalgeographic.com › article › tsunamisTsunami Facts and Information - National Geographic

    A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet, onto land. Learn how tsunamis are caused by underwater earthquakes, landslides, volcanoes, or meteorites, and how they affect coastal areas.

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