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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]
The wave caught the Japanese off guard, not knowing its origin, and was explained in the book, The Orphan Tsunami. [83] 1703 Kanto, Japan 1703 Genroku earthquake: Earthquake On 31 December, 1703, an 8.2 magnitude earthquake struck Edo. A tsunami up to 11.7 metres (38 ft) high was recorded along the coast of the KantÅ Region. Official reports ...
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 ...
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.
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]
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.
Amplitude, Wave Height, or Tsunami Height: Refers to the height of a tsunami relative to the normal sea level at the time of the tsunami, which may be tidal High Water, or Low Water. It is different from the crest-to-trough height which is commonly used to measure other type of wave height.
A tsunami warning was issued for the coast from Davenport, California, to the border between Douglas and Lane counties in Oregon. The Tsunami Warning Center canceled the warning at about 11:55 a.m .