The impact was heard 50 miles (80 km) away, and the sudden displacement of water resulted in a megatsunami that washed out trees to a maximum elevation of 1,720 feet (524 meters) at the entrance of Gilbert Inlet. Brady Glacier, off Cross Sound near outside waters, showed much new ice this morning when Goodwin flew by. Once and Future Tsunamis Ice and water from the glacier contributed to the tsunami generated by the sudden impact on the surface of the sea. On 26 December 2004, an undersea earthquake off the coast of Indonesia sent a wall of water surging across the Indian Ocean. above water. The Swansons were flown here from the coast by a Juneau bush pilot, Dean Goodwin, who reported nearly all bays and harbors in the area were dotted with ice from quake-shattered glaciers. As they glanced toward three glaciers at the head of the bay, they could see ice and debris being sheared off the faces "like a gravel truck dumping a full load. The largest earthquake ever measured, a 9.5, started a series of tsunamis in Dr. Charles Richeter of the California Institute of Technology seismological laboratory at Pasadena said that had the quake occurred in a populated area it would have caused a disaster. "We managed to bail out the skiff and climb in, and just in the nick of time. They believe a tsunami formed there and rippled People shake their heads when I tell them I saw it that night. dozens of villages along the coast of Java and Sumatra. Lituya Bay, Alaska, July 9, 1958 tsunamis are rare in the Indian Ocean, local people did not know to flee inland after a are recognizable as the light areas rimming the bay. engulfing every port on the east coast of the U.S., which they believe may have More than 10000000 dollars time. Goodwin was accompanied in his rescue flight by. A water tower collapsed, and a cabin was damaged beyond repair. In the meantime the public is requested to limit their calls outside of Alaska and to southeastern Alaska to emergency calls until full service is restored. USC Tsunami Research Group: 1958 Lituya Bay Tsunami, http://www.usc.edu/dept/tsunamis/alaska/1958/webpages/index.html, Disaster Pages of Dr. George PC: “The Mega-Tsunami of July 9, 1958 in Lituya Bay, Alaska”, http://www.drgeorgepc.com/Tsunami1958LituyaB.html, http://www.gi.alaska.edu/AlaskaScienceForum/article/giant-waves-lituya-bay, BBC Nature: Mega Tsunami – Alaskan Super Wave – Amazing Survival, http://www.youtube.com/watch?v=yN6EgMMrhdI. Minor damage was reported throughout the area, but it apparently was most severe along the 100-mile stretch of the Gulf of Alaska coastline between Lituya Bay and the fishing village of Yakutat. It does, however, highlight the importance of documenting such events for posterity, and to consider such extreme events when making development decisions for coastal areas in areas with high seismicity or vulnerability to tsunamis. Another couple on Khantaak Island at the time of the quake were Landon and Anne Gilbert, who live on the opposite end of the island. Ask the Expert I graduated in 2007 with a project studying how permafrost, that´s frozen soil, is reacting to the more visible recent changes of the alpine environment. The island is about a mile off shore. Satellite image of the Lituya Bay in Alaska. On July 10, 1958, a magnitude 7.7 earthquake occurred on the Fairweather Fault in southeast Alaska. This was so big that it is known scientifically as a megatsunami. every person on Earth. Whether any other boats were damaged or missing was not known immediately because of poor communications with outlying coastal points. See how the waves spread, and discover the massive human and financial cost to the countries involved, Thu 25 Dec 2014 16.30 EST The giant waves of Lituya Bay Studying therefore old maps, photographs and reports, I became interested in the history of geology and how early geologists figured out how earth works, blogging about it in my spare time. The earthquake occurred along this fault, triggering a rockfall from the mountains. The narrow entrance of the bay has a depth of only 33 feet (10 m). ratio 2.5) and the May 1970 Huascarán landslide (est. The earthquake caused a subaerial rockfall in the Gilbert Inlet. tremor. This additional volume would explain the large changes in the underwater shape of the sea floor in the bay, and the additional energy of waves, especially at the western end of the bay. This page was last edited on 2 November 2020, at 15:49. A tidal wave alert was issued late last night throughout the Hawaiian Islands, apparently the result of the Alaska quake, but was cancelled early today by the U.S. Coast and Geodetic Survey. released enough energy, scientists estimate, to boil 40 gallons of water for We develop seismic policies and share information to promote programs intended to reduce earthquake-related losses. The narrow entrance of the bay has a depth of only 33 feet (10 m). Some damage to oil lines, water tanks and docks was done in Yakutat, but apparently the loss was minor elsewhere. Scientists concluded that there had been a "dual slide" involving a rockfall which also triggered a release of 5 to 10 times its volume of sediment trapped by the adjacent Lituya Glacier, a ratio comparable with other events where this "dual slide" effect is known to have happened. An oil slick was sighted in early afternoon inside the bay near where the Wagner's troller last was seen. The epicenter of the quake was at latitude 58.37° N, longitude 136.67° W near the Fairweather Range, 7.5 miles (12.1 km) east of the surface trace of the Fairweather fault, and 13 miles (21 km) southeast of Lituya Bay.
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