Greenland: A landslide triggered a mega-tsunami. Then came
网页2024年9月13日 · The subsequent mega-tsunami — one of the highest in recent history — set off a wave which became trapped in the bendy, narrow fjord for more than a week, sloshing back and forth every 90 seconds.
Tsunami - Wikipedia
网页A typical wave period for a damaging tsunami is about twelve minutes. Thus, the sea recedes in the drawback phase, with areas well below sea level exposed after three minutes. For the next six minutes, the wave trough builds into a ridge which may flood the coast, and destruction ensues.
Tsunamis - National Oceanic and Atmospheric Administration
网页2018年10月1日 · 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 source, sometimes crossing entire ocean basins.
Tsunami | Definition, Meaning, & Facts | Britannica
网页5 天之前 · A tsunami is a catastrophic ocean wave, usually caused by a submarine earthquake, an underwater or coastal landslide, or a volcanic 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.
Tsunami Facts and Information - National Geographic
网页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 destruction...
650-foot tsunami in Greenland made waves for days, scientists find
网页2024年9月12日 · The tsunami was the result of melting glacial ice, which caused a landslide that displaced water in a Greenland fjord. The waves it created bounced back and forth across the fjord for nine days.
Tsunami Facts: How They Form, Warning Signs, and Safety Tips
网页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 with the...
What is a tsunami? - NOAA's National Ocean Service
网页Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea. They speed along as fast as jet planes. As they near land, these waves rear up to great heights and can drown whole islands.
What causes a tsunami? An ocean scientist explains the physics of …
网页2022年1月19日 · What generates them? How do they travel so fast? And why are they so destructive? When the Hunga Tonga-Hunga Ha'apai volcano erupted, it launched ash into the atmosphere, created a powerful shock...
Tsunamis - National Oceanic and Atmospheric Administration
网页2023年8月15日 · Tsunamis are a series of long waves generated by a large and sudden displacement of the ocean. Large earthquakes below or near the ocean floor are the most common cause, but landslides, volcanic activity, certain types of weather, and meteorites can also cause a tsunami. Tsunamis are sometimes referred to as "tidal waves", but this is very ...
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