This earthquake is notable because it generated a disproportionately large tsunami given its surface wave magnitude (tsunami magnitude, M t, 9.3 [Abe, 1979]). Its tsunami magnitude, 9.3, is comparable to the 9.1 magnitude of the 2011 Tohoku tsunami. Scotch Cap Lighthouse on Unimak Island, Alaska, before and after the April 1, 1946 earthquake and tsunami. It also damaged fishing boats in Chile. The 1946 M S 7.4 earthquake may have ruptured a section of the megathrust offshore Unimak Island. The tremor was recorded early morning on Wednesday 4 November 2020 at 3.23 am local time, at a moderately shallow depth of 27 miles below the surface. One wave as high as a 13-story building hit locally. Unimak Island, Alaska has had: (M1.5 or greater) 0 earthquakes in the past 24 hours 1 earthquake in the past 7 days; 4 earthquakes in the past 30 days This earthquake is notable because it generated a disproportionately large tsunami given its surface wave magnitude (tsunami magnitude, M t , 9.3 [ Abe , 1979 ]). Despite the destruction to the Aleutian Island Unimak, the tsunami had … The event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. As with the earlier event it also caused a dangerous tsunami that caused significant damage in the Aleutian Islands and in Hawaii and was observed as far away as Chile. 13) Magnitude: 8.6 – South of Alaska Unimak Island Earthquake, Alaska (1946-04-01) This earthquake struck near Aleutian Islands and claimed between 165 – 173 casualties and resulted in nearly $26 million dollars of destruction. It got more and more puzzling as a seafloor search failed to reveal what scientists expected to find. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. The great Mw=8.7 Rat Islands underthrusting earthquake (larger star on the above map) of February 4, 1965, ruptured a 600-km segment of the western end of the Aleutian Islands (black solid line). SEE PHOTO(s) - An ORIGINAL front page of a NEWSPAPER, the Oakland Tribune (CA) dated April 2, 1946.This original newspaper front page contains headline, map, … De 1946 Aleoeten aardbeving plaatsvond nabij de Aleoeten, Alaska april 1. AEC located nearly 100 aftershocks (open circles) through the end of the month (M>=1.9). The most detailed and documented accounts of the tsunami come from Scotch Cap, located on Unimak Island, and the Hawaiian Islands. Oregon reported a ten-foot wave. For this puzzling event, maximum near-field run-up (42 m) is more than 6 times the computed average dip slip on the source fault (Johnson and Satake, 1997). Unimak Island, Alaska has had: (M1.5 or greater) 0 earthquakes in the past 24 hours 2 earthquakes in the past 7 days; 15 earthquakes in the past 30 days Hilo’s waterfront on the island of Hawaii was completely obliterated and 159 people lost the lives there. Please visit our EBAY STORE for THOUSANDS MORE HISTORICAL NEWSPAPERS for SALE or at auction. Hawaii experienced the worst damage, with 159 deaths (96 at Hilo) and $26 million in property loss. In 1946 at Unimak Pass, Alaska, a tsunami destroyed the lighthouse at Scotch Cap, Unimak Island, took 159 lives on the Hawaiian Islands, damaged island coastal facilities across the south Pacific, and destroyed a hut in Antarctica. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1. The shock had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI (Strong). The lighthouse was a few miles from the epicenter on Unimak Island, Alaska. One of the structures affected by the tsunami was the newly built Scotch Cap Lighthouse on Unimak Island, Alaska. The shock had a moment magnitude of 8.1 and a maximum Mercalli intensity of VI (Strong).It resulted in 165 casualties (159 people on Hawaii and six in Alaska) and over $26 million in damage. The 1946 Unimak earthquake occurred along the plate margin off Unimak Island in an unusually structured region that transitions from the Alaska to the Aleutian convergent margin system.

Many victims were swept out to sea by receding water. 1946-11-01 11:14:28 UTC 7.0 magnitude, 25 km depth Andreanof Islands, Aleutian Island 7.0 magnitude earthquake 1946-11-01 11:14:28 UTC at 11:14 November 01, 1946 UTC Unimak Island acquired between 1998 and 2001 and interpret the observed deformation in terms of volcanic and tectonic activities. World War II was over. 316 km 2 (=122 sqare miles) as a first-order estimate. [3], Waves reportedly traveled across the ocean at 500 miles an hour and measured 55 feet high, crest to trough, according to the USGS. In Hilo, the death toll was high: 173 were killed, 163 injured, 488 buildings were demolished and 936 more were damaged. But the lighthouse tenders would never return to their homes in the Lower 48. The event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. The event was classified as a tsunami earthquake due to the discrepancy between the size of the tsunami and the relatively low surface wave magnitude. The tsunami crossed the Pacific, producing waves up to thirty feet high in French Polynesia. The Mw 8.6 earthquake in 1946 off the Pacific shore of Unimak Island at the end of the Alaska Peninsula generated a far-field tsunami that crossed the Pacific to Antarctica. The tsunami reached the Hawaiian Islands five hours later, causing considerable damage and loss of life. [3], The tsunami was unusually powerful for the size of the earthquake. At the lighthouse 5 men lost … [5] The large-scale destruction prompted the creation of the Seismic Sea Wave Warning System, which became the Pacific Tsunami Warning Center in 1949. Waves there demolished 77 homes and many other buildings. It is the charter member of "tsunami" earthquakes that produce outsized far-field tsunamis for the recorded magnitude. The Alaska Earthquake Center located a strong earthquake that occurred on Sunday, November 20, 2005 at 3:53 AM local time (12:53 UTC) in the Unimak Island region of Alaska (red star on the above map). Seawater displaced by the giant earthquake sent a 100-foot wave into the Scotch Cape lighthouse on Unimak, destroying the concrete structure and killing the five men inside.
The earthquake seemed too small to spawn the huge local wave and scientists struggled for decades to figure out what happened. The April 1, 1946 Pacific-wide tsunami was caused by a magnitude 7.3 Ms earthquake that occurred south of Unimak Island, Alaska. This earthquake is notable because it generated a disproportion-ately large tsunami given its surface wave magnitude (tsu-nami magnitude, M t, 9.3 [Abe, 1979]). They never knew what hit them in the 2 … On April 1, 1946, at 12:29 GMT, an earthquake occurred in the Aleutian Islands of Alaska. World War II was over. In 1946 at Unimak Pass, Alaska, a tsunami destroyed the lighthouse at Scotch Cap, Unimak Island, took 159 lives on the Hawaiian Islands, damaged island coastal facilities across the south Pacific, and destroyed a hut in Antarctica. Their lonely Coast Guard assignment on Unimak Island would be over in a few months. They had survived. This tsunami carried a wave height exceeding one hundred feet. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. (U.S. Coast Guard photographs) Tsunami waves advancing across Coconut Island, at the Hilo Bay waterfront. During the quake, a large section of seafloor was uplifted along the fault where the quake occurred, producing a large, Pacific-wide tsunami. The tsunami magnitude of 9.3 is comparable to the magnitude 9.1 tsunami that devastated the Tohoku coast of Japan in 2011. One wave as high as a 13-story building hit locally. (ITIC Archives; Photograph by Ted Lusdy). Hawaii experienced the worst damage, with 159 deaths (96 at Hilo) and $26 million in property loss. Their lonely Coast Guard assignment on Unimak Island would be over in a few months. A 7.8 earthquake off the coast of the Aleutian Islands of Alaska on April 1, 1946 triggered a tsunami which caused the death of 165 people and caused more than $26 million in damage. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1, 1946, and generated a Pacific-wide tsunami. The Mw 8.6 earthquake in 1946 off the Pacific shore of Unimak Island at the end of the Alaska Peninsula generated a far-field tsunami that crossed the Pacific to Antarctica. This earthquake has

The quake triggered devastating tidal waves throughout the Pacific, particularly in Hawaii. The magnitude 8.1 earthquake caused 165 casualties. On Unimak Island's Pacific shore, a runup of 42 m destroyed the lighthouse at Scotch Cap. The largest of these was a M8.6 earthquake on April 1, 1946, which generated a large tsunami that caused destruction and loss of life both locally on Unimak Island and more distantly at Hilo, Hawaii. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1. Wave heights reached an estimated 115 feet in Alaska, and averaged 30 feet in Hawaii, where the tsunami struck without warning nearly 5 hours after the earthquake. add Nature:Earthquake and tsunami:Unimak Island 1946 to 'my astro' Biography Aleutian earthquake of magnitude 8,6 (updated 2006).A devastating tsunami followed the shock.The height of the tsunami reached 42 m.In Hawaii 159 deaths were to blame as the waves still climbed up to 12 m. Natural history. On April Fools Day in 1946 an earthquake off the coast of the Aleutian Islands in Alaska spawned a series of waves known as a tsunami. (U.S. Coast Guard photographs) Tsunami waves advancing across Coconut Island, at the Hilo Bay waterfront. Scotch Cap Lighthouse sits on the southwest shore of Unimak Island two months before the giant wave of April 1, 1946. The low coupling across the rupture zone of the 1946 earthquake is a strong argument for the idea that the earthquake and tsunami did not result from a purely double-couple (earthquake) source. The tsunami flooded all coastlines of all islands and resulted in 159 deaths. Van Wikipedia, ... met meerdere verwoestende golven op een hoogte variërend 45-130 ft. De tsunami uitgewist de Scotch Cap Lighthouse op Unimak Island, Alaska onder anderen, en doodde alle vijf vuurtorenbewaarders. The seafloor along the fault was elevated, triggering a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. add Nature:Earthquake and tsunami:Unimak Island 1946 to 'my astro' Biography Aleutian earthquake of magnitude 8,6 (updated 2006).A devastating tsunami followed the shock.The height of the tsunami reached 42 m.In Hawaii 159 deaths were to blame as the waves still climbed up to 12 m. De schok had een ogenblik magnitude van 8,6 en een maximale Mercalli intensiteit van VI ( Strong).Het resulteerde in 165-173 slachtoffers en meer dan $ 26 miljoen in schade. Its tsunami magnitude, 9.3, is comparable to the 9.1 magnitude of the 2011 Tohoku tsunami. Aftershocks of the 6.5 quake: Unimak Island Region, Alaska (USA), 30 Oct 1946 07h47 Show info about this Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. Aftershocks of the 8.6 quake 1946 Aleutian Islands (Unimak Island) Earthquake, Alaska (USA, 1946-04-01 12:29 UTC More info Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. On April 1, 1946, an undersea earthquake off the Alaskan coast triggers a massive tsunami that kills 159 people in Hawaii. We focus on the deformation of Westdahl and Fisher volcanoes and the plate coupling in the source region of the 1946 earthquake. The effects of the tsunami were felt along the west coast of the United States, in Washington, Oregon, and California. In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. 1994)--but was to the west of the 1946 earthquake, near the Andreanof Islands. When the Alaska National Interest Lands Conservation Act was passed on 2 December 1980, 910,000 acres (370,000 ha) of the island was designated as wilderness. 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