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Lituya Bay is a fjord located on the Fairweather Fault in the northeastern part of the Gulf of Alaska. It is a T-shaped bay with a width of 2 miles (3 km) and a length of 7 miles (11 km). [8] Lituya Bay is an ice-scoured tidal inlet with a maximum depth of 722 feet (220 m). The narrow entrance of the bay has a depth of only 33 feet (10 m). [8]
A study of Lituya Bay in 1953 concluded that sometime around 1874, perhaps in May 1874, another megatsunami occurred in Lituya Bay in Alaska. Probably occurring because of a large landslide on the south shore of the bay in the Mudslide Creek Valley, the wave had a maximum run-up height of 24 metres (80 ft), flooding the coast of the bay up to ...
Lituya Bay, Alaska: Unknown: On 27 October 1936, a megatsunami occurred in Alaska's Lituya Bay with a maximum breakthrough height of 490 feet (149 m) in Crillon Inlet at the head of the bay. All four eyewitnesses to the wave in Lituya Bay survived and described it as being between 100 and 250 feet (30 and 76 m) high as it traveled across the bay.
Cenotaph Island in Lituya Bay. The smaller Cascade and Crillon glaciers and the larger Lituya Glacier all spill into Lituya Bay, which is a part of Glacier Bay National Park and Preserve. Cenotaph Island is located roughly in the middle of the bay. The entrance of the bay is approximately 500 m (0.31 mi) wide, with a narrow navigable channel. [3]
“The most noteworthy of these tsunamis was in 1958, when a landslide entered the Lituya Bay Fiord in Glacier Bay and generated a wave that went 1,700 feet up the opposite side of the fiord ...
The megatsunami was the largest known marine tsunami worldwide since the Lituya Bay wave; [10] although the Taan Fiord landslide was larger than the one at Lituya Bay, the Lituya Bay wave was larger than the one in Taan Fiord because the landslide in Taan Fiord did not fall from as great a height and landed in shallower water. [4]
On July 9, 1958, an earthquake along the Fairweather Fault loosened about 40 million cubic yards of rock above Lituya Bay. The impact of this enormous volume of rock falling from approximately 3,300 feet (1,000 m) produced locally the largest recorded tsunami (an estimated 1,700 feet (520 m) high) and devastated the entire bay. [3]
Large tsunamis have occurred in the US and will again. A magnitude 9.2 earthquake in the Gulf of Alaska caused damage and loss of life along the West Coast in 1964. More than 150 tsunamis have ...