Lituya Bay megatsunami (CCA Richard Droker).

In July 1958, an earthquake triggered a landslide in Lituya Bay that generated a megatsunami. It was the largest tsunami in recent history. Lituya Bay is located in Alaska. The height of the initial wave was over 500 meters (1700 feet).

Photo: debris from the rockfall that caused the 1958 Lituya Bay tsunami in Alaska (Creative Commons: Richard Droker).


Lituya Bay is a t-shaped bay with a narrow inlet to the ocean. It has a depth of 220 meters.

The 1958 earthquake had a magnitude of 8.3 on the Richter scale. As a result of this intensity, the earthquake triggered a rockslide. Over 30 million tons of rock fell into the bay and displaced a large amount of water. This displacement caused the tsunami.

The megatsunami caused five deaths.

Eyewitness to the Megatsunami

Video: BBC video of the Alaskan Super Wave (source: YouTube).

Megatsunami History of Lituya Bay

The typical tsunami has a small initial wave height in the ocean. On the other hand, a megatsunami has a large initial wave height. Heights in the hundreds of meters may occur. This super tsunami is triggered by an impact. The impact may be from a landslide or a meteor.

The 1958 megatsunami was not the first in the bay. Similar events were recorded in 1854, 1899 and 1936.

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Mega Tsunami with 500-Foot Waves Swallowed Ancient Island, Live Science.


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4 comments on "Megatsunami: Lituya Bay Super Waves"

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Ronand Abella

And Lituya bay ay mkita sa alaska. Duon nng yari ang malaking tubig nag parang alon yun ang pinaka malaki na tubig sa mundo. sa 1958 yan nangyari noon at and isang lituya ay meron nang mga bundok na ito.

Ronand Abella

Lituya bay is a t- shaped bay with a norrow inlet to the ocean. In july 1958 an earthquake triggered a land side in Lituya bay that generated mega tsunami. Lituuya bay is located in alaska .

Webster Gabiana

ang superwave ay may maariay maka patay sa ibat ibang tao bakit mataas masado ang tubig sa lupa

Webster Gabiana

The super wave can kill you becuse the wave is very strong .