What is a tsunami? - NOAA's National Ocean Service
A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions. On September 29, 2009, a tsunami caused substantial damage and loss of life in American Samoa, Samoa, and Tonga. The tsunami was generated by a …
Tsunami | Definition, Meaning, & Facts | Britannica
5 天之前 · What is a tsunami? A tsunami is a catastrophic ocean wave, usually caused by a submarine eruption. Waves radiate outward from the generating impulse at speeds of up to 500 miles (800 km) per hour, reaching maximum heights of 100 feet (30 metres) near coastal areas.
The science behind tsunamis | National Oceanic and Atmospheric ...
5 天之前 · About 80% of all known tsunamis are triggered by earthquakes. These seismic events move Earth's surface, displacing the water above and generating waves that rapidly travel in all directions across the ocean or body of water. Not all earthquakes create tsunamis.
What Is a Tsunami? Definition and Explanation - Science Notes …
2023年8月23日 · A tsunami is a series of enormous ocean waves that results from the rapid displacement of a large volume of water. The waves often rise to a height of over 30 meters (100 feet). Unlike typical ocean waves, which are caused by the wind, tsunamis are primarily the result of geological activities.
Tsunamis - National Oceanic and Atmospheric Administration
A tsunami is a series of extremely long waves caused by a large and sudden displacement of the ocean, usually the result of an earthquake below or near the ocean floor. This force creates waves that radiate outward in all directions away from their …
Tsunami - Wikipedia
A tsunami (/(t) s uː ˈ n ɑː m i, (t) s ʊ ˈ-/ (t)soo-NAH-mee, (t)suu-; [1] [2] [3] [4] from Japanese: 津波, lit. 'harbour wave', [5] pronounced) 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.
What are tsunamis? | U.S. Geological Survey - USGS.gov
A tidal wave is a shallow water wave caused by the gravitational interactions between the Sun, Moon, and Earth ("tidal wave" was used in earlier times to describe what we now call a tsunami.) A tsunami is an ocean wave triggered by large earthquakes that …
Tsunami 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 (30.5 meters), onto land. These walls of water can cause widespread...
Tsunami facts: check out the mighty wave! - National Geographic Kids
A tsunami (soo-NAH-mee) is one of the world’s most powerful and destructive natural forces. They can speed across the ocean as fast as a jet plane, swallow up islands and wipe out villages. But what causes tsuamis…?
Tsunami Facts: How They Form, Warning Signs, and Safety Tips
2007年4月2日 · A tsunami is a series of great sea waves caused by an underwater earthquake, landslide, or volcanic eruption. More rarely, a tsunami can be generated by a giant meteor impact...