By contrast, megatsunamis occur when a large amount of material suddenly falls into water or anywhere near water (such as via a landslide, meteor impact, or volcanic eruption). They can have extremely large initial wave heights in the hundreds of metres, far beyond the height of any ordinary tsunami.

2024年9月13日 · It started with a melting glacier that set off a huge landslide, which triggered a 650-foot high mega-tsunami in Greenland last September. Then came something inexplicable: a mysterious vibration...

2024年9月12日 · Now, scientists have tracked these mysterious signals to their source—a colossal landslide in a remote Greenland fjord that sparked tsunami waves up to 200 meters tall, the team reports today in Science.

2024年3月7日 · A mega-tsunami represents an extraordinary manifestation of nature’s power, characterized by immense waves surpassing the scale of conventional tsunamis. One notable instance is the devastating Indian Ocean tsunami of 2004, renowned for its unprecedented force and widespread impact.

What is a Mega-Tsunami? A mega-tsunami is a remarkably large wave created by the normal displaced water that would cause a regular tsunami. The tsunami that occurred in the Indian Ocean in 2004 is often cited as an example. That wave …

2024年9月10日 · In September 2023, a megatsunami in Greenland triggered seismic waves worldwide, caused by a landslide in Dickson Fjord. The event generated two seismic signals: a high-energy signal from the landslide and a long-lasting VLP signal from a seiche in the fjord.

2014年12月1日 · A ‘mega-tsunami’ significantly exceeds large historic tsunamis, such as Krakatoa (1983), Chile (1960) or Alaska (1964), having a wave-height potential of several metres in the deep ocean and a run-up of several decametres or more at beaches thousands of kilometres away from the source area.

2023年4月28日 · The Tonga underwater volcanic eruption rivaled the strength of the largest U.S. nuclear bomb and produced a "mega-tsunami" nearly the height of a 30-story skyscraper, a recent study finds.

2024年8月13日 · On September 16, 2023, a massive landslide in Greenland triggered a megatsunami, creating a standing wave that oscillated in Dickson Fjord for over a week, observed worldwide through seismic stations.

2019年1月10日 · A megatsunami is a term that is used to refer to a tsunami with a larger initial wave amplitude than a normal tsunami. Normal tsunamis result from the movement of the sea floor and have smaller wave height offshore.