(U.S. Coast Guard photographs) Tsunami waves advancing across Coconut Island, at the Hilo Bay waterfront. 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.

The quake triggered devastating tidal waves throughout the Pacific, particularly in Hawaii. The tsunami magnitude of 9.3 is comparable to the magnitude 9.1 tsunami that devastated the Tohoku coast of Japan in 2011. 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. It also damaged fishing boats in Chile. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1, 1946, and generated a Pacific-wide tsunami. Unimak Island acquired between 1998 and 2001 and interpret the observed deformation in terms of volcanic and tectonic activities. De 1946 Aleoeten aardbeving plaatsvond nabij de Aleoeten, Alaska april 1. 14) Magnitude: 8.5 – Banda Sea (1938-02-01) The tsunami obliterated the Scotch Cap Lighthouse on Unimak Island, Alaska among others, and killed all five lighthouse keepers. The tsunami had little effect on the Alaskan mainland, due to the presence of the Aleutian Islands, which absorbed the brunt of the tsunami’s power. World War II was over. Despite the destruction to the Aleutian Island Unimak, the tsunami had almost an imperceptible effect on the Alaskan mainland. They had survived. (ITIC Archives; Photograph by Ted Lusdy). It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants.

Many victims were swept out to sea by receding water. Hawaii experienced the worst damage, with 159 deaths (96 at Hilo) and $26 million in property loss. 2. 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. Natural history. The tsunami caused much damage in Maui as well. Natural history. On the first of April 1946 Alaska experienced one of its greatest tsunamis, triggered by an earthquake of magnitude 8.1 near Unimak Island in the Aleutian Island Chain. We focus on the deformation of Westdahl and Fisher volcanoes and the plate coupling in the source region of the 1946 earthquake. This tsunami carried a wave height exceeding one hundred feet. The April 1, 1946 Pacific-wide tsunami was caused by a magnitude 7.3 Ms earthquake that occurred south of Unimak Island, Alaska. A Pacific-wide tsunami was triggered by the earthquake, which had a surface-wave magnitude of 7.8, an epicenter of 52.8° N, 163.5° W, and a focal depth of 25 km. The tsunami crossed the Pacific, producing waves up to thirty feet high in French Polynesia. Scotch Cap Lighthouse sits on the southwest shore of Unimak Island two months before the giant wave of April 1, 1946. 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 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1, 1946, and generated a Pacific-wide tsunami. The waveform analysis indicates unilateral rupture from east to west and three large pulses of moment release located along the fault (Beck and Christensen, 1991). On April 1, 1946, at 12:29 GMT, an earthquake occurred in the Aleutian Islands of Alaska. The 1946 Aleutian Islands earthquake was an earthquake near the Aleutian Islands on April 1, 1946. AEC located nearly 100 aftershocks (open circles) through the end of the month (M>=1.9). World War II was over. It resulted in 165–173 casualties and over $26 million in damage. On April 1, 1946, the sea floor ruptured just south of Unimak Island in the Aleutian Islands. On April 1, 1946, the sea floor ruptured just south of Unimak Island in the Aleutian Islands. [3], Waves reportedly traveled across the ocean at 500 miles an hour and measured 55 feet high, crest to trough, according to the USGS. April 1, 1946, was witness to a deadly tsunami earthquake generated south of Unimak Island with a moment magnitude of 8.6. that caused consequential events that lent to a … On April 1, 1946 at 4:28 am (12:28 UTC), an 8.6 moment magnitude earthquake struck off the coast of Unimak Island in Alaska’s Aleutian Islands, generating a tsunami that caused the greatest damage and number of deaths in Hawaii’s history, leading to the creation of the United States’ first tsunami warning system. The Earthquake Event Page application supports most recent browsers, view supported browsers. Total property damage in Alaska was $250,000 while California experienced one death and $10,000 damage from the tsunami. (U.S. Coast Guard photographs) Tsunami waves advancing across Coconut Island, at the Hilo Bay waterfront. The M w 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 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. 1994)--but was to the west of the 1946 earthquake, near the Andreanof Islands. On Unimak Island's Pacific shore, a runup of 42 m destroyed the lighthouse at Scotch Cap. On Unimak Island's Pacific shore, a runup of 42 m destroyed the lighthouse at Scotch Cap. One person drowned as a result of the ten-foot waves that struck Santa Cruz. One wave as high as a 13-story building hit locally. 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. 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. 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. The magnitude 8.1 earthquake caused 165 casualties. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1. This earthquake had the same magnitude of the earlier earthquake--8.6 on the moment magnitude scale (Johnson et al. 1946-04-01 12:29:01 UTC 8.6 magnitude, 15 km depth Akutan, Alaska, United States 8.6 magnitude earthquake 1946-04-01 12:29:01 UTC at 12:29 April 01, 1946 UTC The lighthouse was a steel-reinforced concrete structure standing about ninety-five feet above sea level. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. They had survived. It was followed by a Pacific-wide tsunami.The earthquake was a magnitude 8.6 (originally rated 7.8 but later revised), with its epicenter at 52.8°N, 163.5°W, and focal depth of 25 km. The 1946 Unimak Tsunami Earthquake Area: Revised Tectonic Structure in Reprocessed Seismic Images and a Suspect Near-Field Tsunami Source . Their lonely Coast Guard assignment on Unimak Island … The effects of the tsunami also reached Washington, Oregon, and California. The wave reached Kauai, Hawaii 4.5 hours after the quake, and Hilo, Hawaii 4.9 hours later. At the lighthouse 5 men lost … (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. The shock had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI (Strong). The April 1, 1946 Aleutian earthquake (Ms 7.4; Mw 8.2) stands out among tsunamigenic events because it generated both very high run-up near the earthquake source region and a destructive trans-Pacific tsunami. 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). The tsunami arrived at … The shock had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI (Strong). In Hilo, the death toll was high: 173 were killed, 163 injured, 488 buildings were demolished and 936 more were damaged. 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. They had survived. The tsunami magnitude of 9.3 is comparable to the magnitude 9.1 tsunami that devastated the Tohoku coast of Japan in 2011. On the first of April 1946 Alaska experienced one of its greatest tsunamis, triggered by an earthquake of magnitude 8.1 near Unimak Island in the Aleutian Island Chain. 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]). The Eastern Aleutian earthquake of April 1, 1946 spawned Hawaii's most damaging tsunami. 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). the western Unimak area did not rupture during the 1957 earthquake. In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. [4] The residents of these islands were caught off-guard by the onset of the tsunami due to the inability to transmit warnings from the destroyed posts at Scotch Cap, and the tsunami is known as the April Fools' Day Tsunami in Hawaii because it happened on April 1 and many thought it to be an April Fool's Day prank. 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 April 1, 1946 Pacific-wide tsunami was caused by a magnitude 7.3 Ms earthquake that occurred south of Unimak Island, Alaska. A mystery surrounded this earthquake for a time. One of the structures affected by the tsunami was the newly built Scotch Cap Lighthouse on Unimak Island, Alaska. 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. This earthquake has 2. A tsunami over 100 ft high, triggered by an earthquake south of Unimak Island, struck the Scotch Cap Lighthouse at 2:18 a.m on April 1, 1946. Scotch Cap Lighthouse on Unimak Island, Alaska, before and after the April 1, 1946 earthquake and tsunami. [3], The tsunami was unusually powerful for the size of the earthquake. 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 event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. 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. In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. Unimak Island is part of the Alaskan continent that is geographically part of the Alaska World War II was over. Its tsunami magnitude, 9.3, is comparable to the 9.1 magnitude of the 2011 Tohoku tsunami. Witnesses told of waves inundating streets, homes, and storefronts. [5] The large-scale destruction prompted the creation of the Seismic Sea Wave Warning System, which became the Pacific Tsunami Warning Center in 1949. 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