Portal:Tsunamis
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A tsunami (/(t)suːˈnɑːmi, (t)sʊˈ-/ (t)soo-NAH-mee, (t)suu-; from Japanese: 津波, lit. 'harbour wave', pronounced [tsɯnami]) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations, landslides, glacier calvings, meteorite impacts and other disturbances) above or below water all have the potential to generate a tsunami. Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of water from a large event.
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Events that can cause a tsunami
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General images
- Image 4Figure 1: Diagram showing how earthquakes can generate a tsunami. (from Tsunamis in lakes)
- Image 5Mast with warning system, and sign detailing escape routes, on the coast of Okumatsushima, Miyagi prefecture, Japan (this coast was severely hit by the 2011 tsunami) (from Tsunami warning system)
- Image 7Diagram showing several measures to describe a tsunami size, including height, inundation and run-up (from Tsunami)
- Image 8An illustration of the rhythmic "drawback" of surface water associated with a wave. It follows that a very large drawback may herald the arrival of a very large wave. (from Tsunami)
- Image 10Japanese Tsunami warning sign (from Tsunami warning system)
- Image 11When the wave enters shallow water, it slows down and its amplitude (height) increases. (from Tsunami)
- Image 12Evacuation route sign in a low-lying coastal area on the West Coast of the United States (from Tsunami warning system)
- Image 13The wave further slows and amplifies as it hits land. Only the largest waves crest. (from Tsunami)
- Image 14Calculated travel time map for the 1964 Alaska tsunami (in hours) (from Tsunami)
- Image 16Tsunami Early Warning Tower board in Hikkaduwa, Sri Lanka (from Tsunami warning system)
- Image 22The energy released produces tsunami waves. (from Tsunami)
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In the news
- 3 April 2024 – 2024 Hualien earthquake
- A magnitude 7.4 earthquake strikes off the coast of Taiwan, prompting tsunami warnings for Okinawa Prefecture, Japan. A large section of the uninhabited Guishan Island collapses into the ocean. Nine people are killed in Taiwan, including four by rockfalls, with more than 930 others injured. (AP) (Al Jazeera)
Subcategories
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Topics
- List of tsunamis
- Tsunami earthquake
- Tsunami warning system
- Tsunamis in lakes
- Tsunami deposit
- Deep-ocean Assessment and Reporting of Tsunamis
- Tsunami Advisory Center of the Ministry of National Resources
- Tsunami bomb
- Meteotsunami
- NOAA Center for Tsunami Research
- Indian Ocean Tsunami Warning System
- Pacific Tsunami Warning Center
- Submarine earthquake
- UNMAI
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