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A megatsunami is a tsunami with an initial wave amplitude measured in many tens or hundreds of metres.The term "megatsunami" has been defined by media and has no precise definition, although it is commonly taken to refer to tsunamis over 100 metres (330 ft) high. [2]
World's Biggest Tsunami: The largest recorded tsunami with a wave 1,720 feet (520 m) tall in Lituya Bay, Alaska; Photos of damage from the 1958 tsunami; Eyewitness reports of the tsunami; Video interview with survivors Howard and Sonny Ulrich (boat "Edrie"). "Mega-tsunami: Wave of Destruction". Air Date: BBC2, October 12, 2000.
The Lituya Bay megatsunami caused damage at higher elevations than any other tsunami, being powerful enough to push water up the tree covered slopes of the fjord with enough force to clear trees to a reported height of 524 m (1,719 ft). [9] A 1:675 recreation of the tsunami found the wave crest was 150 m (490 ft) tall. [14]
Twenty years ago, the world was stunned by the Asian tsunami, whose towering waves killed an estimated 230,000 people in Indonesia, Sri Lanka, India, Thailand and other countries the day after ...
A 650-foot tsunami in Greenland was the result of melting glacial ice that caused a landslide. The waves it created bounced back and forth for nine days.
Twenty years on from the Boxing Day Indian Ocean tsunami, there are still things we do not know about the phenomenon. More than 230,000 people died after a 9.1 magnitude earthquake under the sea ...
A series of landslides at Reed Terrace between April and August 1953 generated tsunamis at least 11 times. The largest of them reached a maximum height of 65 feet (20 m) along the opposite shore of the lake and was observed as far as 6 miles (9.7 km) away. One of the waves reached a speed of 45 miles per hour (72 km/h). [137] 1956: Amorgos, Greece
A massive tsunami with waves up to 30 m (100 ft) high, known as the Boxing Day Tsunami after the Boxing Day holiday, or as the Asian Tsunami, [10] devastated communities along the surrounding coasts of the Indian Ocean, killing an estimated 227,898 people in 14 countries, violently in Aceh , and severely in Sri Lanka, Tamil Nadu , and Khao Lak ...