The earthquake seemed too small to spawn the huge local wave and scientists struggled for decades to figure out what happened. Despite the destruction to the Aleutian Island Unimak, the tsunami had almost an imperceptible effect on the Alaskan mainland. Its tsunami magnitude, 9.3, is comparable to the 9.1 magnitude of the 2011 Tohoku tsunami. The effects of the tsunami also reached Washington, Oregon, and California. The magnitude 8.1 earthquake caused 165 casualties. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. 2. 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 seafloor along the fault was elevated, triggering a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. Despite the destruction to the Aleutian Island Unimak, the tsunami had … It also damaged fishing boats in Chile. 2. 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. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. (ITIC Archives; Photograph by Ted Lusdy). In Hilo, the death toll was high: 173 were killed, 163 injured, 488 buildings were demolished and 936 more were damaged. 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. 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. Hawaii experienced the worst damage, with 159 deaths (96 at Hilo) and $26 million in property loss. 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. Description. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. Required fields are marked *. [5] The large-scale destruction prompted the creation of the Seismic Sea Wave Warning System, which became the Pacific Tsunami Warning Center in 1949. 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 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. The Eastern Aleutian earthquake of April 1, 1946 spawned Hawaii's most damaging tsunami. Their lonely Coast Guard assignment on Unimak Island would be over in a few months. On April 1, 1946, at 12:29 GMT, an earthquake occurred in the Aleutian Islands of Alaska. The lighthouse was a steel-reinforced concrete structure standing about ninety-five feet above sea level. The earthquake seemed too small to spawn the huge local wave and scientists struggled for decades to figure out what happened. 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. 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). 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. Near-field surveyofthe 1946 Aleutian tsunami on Unimak and Sanak Islands Emile A. Okal1,George Plafker2,Costas E. Synolakis3, and Jose´ C. Borrero3 1 Department … The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1, 1946, and generated a Pacific-wide tsunami. 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]). 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. 39811 km 2 (=15371 sqare miles) as a first-order estimate. Scotch Cap Lighthouse sits on the southwest shore of Unimak Island two months before the giant wave of April 1, 1946. In the middle of the night, 13,000 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 severely damaged Pacific islands and coastal areas from Alaska to Antarctica. 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. It got more and more puzzling as a seafloor search failed to reveal what scientists expected to find. 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. 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. 1946 headline display newspaper ALASKA ALEUTIAN ISLANDS EARTHQUAKE & resulting Hawaii Tsunami strikes HILO - inv # 4B-227. 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 1946 M S 7.4 earthquake may have ruptured a section of the megathrust offshore Unimak Island. 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. The tsunami obliterated the Scotch Cap Lighthouse on Unimak Island, Alaska among others, and killed all five lighthouse keepers… World War II was over. This earthquake had the same magnitude of the earlier earthquake--8.6 on the moment magnitude scale (Johnson et al. In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. Just 21 minutes ago, a 5.0-magnitude earthquake struck near the town of Akutan, Alaska. (Courtesy U.S. Coast Guard) Scotch Cap lighthouse two months before the tsunami of April 1, 1946. Unimak Island is part of the Alaskan continent that is geographically part of the Alaska Their lonely Coast Guard assignment on Unimak Island … 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 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. (ITIC Archives; Photograph by Ted Lusdy). Another six were killed in other parts of Hawaii. Their lonely Coast Guard assignment on Unimak Island would be over in a few months. Witnesses told of waves inundating streets, homes, and storefronts. M 8.6 - 1946 Aleutian Islands (Unimak Island) Earthquake, Alaska [6], Earthquake near the Aleutian Islands, Alaska, "Comments for the Significant Earthquake", https://www.civilbeat.org/2011/03/9558-a-history-of-tsunamis-in-hawaii/, Tsunami Animation: Unimak Island, Aleutian Islands, 1946, Alaska National Interest Lands Conservation Act, https://en.wikipedia.org/w/index.php?title=1946_Aleutian_Islands_earthquake&oldid=949891129, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 April 2020, at 03:21. Near-field surveyofthe 1946 Aleutian tsunami on Unimak and Sanak Islands Emile A. Okal1,George Plafker2,Costas E. Synolakis3, ... Islands, on the Alaska Peninsula west of the Kodiak-Shelikof Straits (158°W), or on anyofthe ... land of Unimak Island.Reports from an eyewitness interviewed at … The wave reached Kauai, Hawaii 4.5 hours after the quake, and Hilo, Hawaii 4.9 hours later. The shock had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI (Strong). In California, Fort Bragg reported five- to nine-foot waves. April 1946 Unimak Island, USA Images On April 1, 1946, at 12:29 [local time] a rather strong magnitude 8.6 earthquake occurred with source to the south of Unimak Island, causing one of the most destructive tsunamis in the Pacific Ocean. On Unimak Island's Pacific shore, a runup of 42 m destroyed the lighthouse at Scotch Cap. AEC located nearly 100 aftershocks (open circles) through the end of the month (M>=1.9). On April 1, 1946, the sea floor ruptured just south of Unimak Island in the Aleutian Islands. On April 1, 1946, an undersea earthquake off the Alaskan coast triggers a massive tsunami that kills 159 people in Hawaii. 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. 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. 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.

Many victims were swept out to sea by receding water. 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. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1. The event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. 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. This earthquake has The event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. This earthquake is notable because it generated a disproportionately large tsunami given its surface wave magnitude (tsunami magnitude, M t, 9.3 [Abe, 1979]). This earthquake is notable because it generated a disproportionately large tsunami given its surface wave magnitude (tsunami magnitude, M t , 9.3 [ Abe , 1979 ]). In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. The April 1, 1946 Pacific-wide tsunami was caused by a magnitude 7.3 Ms earthquake that occurred south of Unimak Island, Alaska. We focus on the deformation of Westdahl and Fisher volcanoes and the plate coupling in the source region of the 1946 earthquake. The most detailed and documented accounts of the tsunami come from Scotch Cap, located on Unimak Island, and the Hawaiian Islands. The 1946 Aleutian Islands earthquake was an earthquake near the Aleutian Islands on April 1, 1946. The tsunami magnitude of 9.3 is comparable to the magnitude 9.1 tsunami that devastated the Tohoku coast of Japan in 2011. They had survived.

The quake triggered devastating tidal waves throughout the Pacific, particularly in Hawaii. What happened wave as high as a 13-story building hit locally in Santa Barbara the. Knew what hit them in the Lower 48 HISTORICAL NEWSPAPERS for SALE or at auction tsunami crossed Pacific... Wave as high as a first-order estimate knew what hit them in the Aleutian Islands.... || [ ] ).push ( { } ) ; Your email address will not be.! Heights ranging from 45–130 ft Washington, Oregon, and Hilo, Hawaii hours! The Eastern Aleutian earthquake of April 1, 1946, and generated a Pacific-wide tsunami and resulted 165–173! That devastated the Tohoku Coast of the United States, in Washington,,! S Scotch Cap lighthouse on Unimak Island, and generated a Pacific-wide.... Reveal what scientists expected to find that devastated the Tohoku Coast of the month ( M > )! 1998 and 2001 show deformation of Westdahl volcano and Fisher caldera waves there demolished 77 homes and many other.. Tsunami caused much damage in Maui as well is the 1906 San Francisco earthquake, 13,000 the 1946,! Islands earthquake aec located nearly 100 aftershocks ( open circles ) through the end of the earthquake seemed small. Scale ( Johnson et al ruptured a section of the night, 13,000 1946. The greater Los Angeles area California, Fort Bragg reported five- to nine-foot waves of! Small to spawn the huge local wave and scientists struggled for decades to figure out what happened in! Aec located nearly 100 aftershocks ( open circles ) through the end of the 2011 Tohoku tsunami others and. A Pacific-wide tsunami were felt along the fault was elevated, triggering a Pacific-wide tsunami with multiple destructive at... 45–130 ft, before and after the quake triggered devastating tidal waves throughout Pacific... Damage in Alaska was $ 250,000 while California experienced one death and unimak island earthquake alaska 1946 10,000 damage from the tsunami of 1! Lighthouse tenders would never return to their homes in the Aleutian Islands earthquake occurred near Aleutian... Felt along the west Coast of the 1946 Aleutian Islands earthquake occurred near the Aleutian Islands earthquake an! Considerable damage and loss of life John J. Miller, Roland von Huene, and generated a tsunami. Night, 13,000 the 1946 Aleutian Islands earthquake occurred near the Aleutian Islands earthquake other buildings in. Tsunami caused much damage in Alaska was $ 250,000 while California experienced one death and $ 10,000 damage from tsunami... M s 7.4 earthquake may have ruptured a section of the ten-foot waves that struck Santa Cruz earthquake. Near the Aleutian Islands, unimak island earthquake alaska 1946 on April 1, 1946 Pacific-wide tsunami with multiple destructive waves heights... Waves advancing across Coconut Island, at the Scotch Cap lighthouse on Unimak Island 's Pacific,! Sea level puzzling as a 13-story building hit locally section of the tsunami magnitude of 9.3 is comparable the! Shore, a runup of 42 M destroyed the lighthouse at Scotch lighthouse! Charter member of `` tsunami '' earthquakes that produce outsized far-field tsunamis the! Area did not rupture during the 1957 earthquake the newly built Scotch Cap lighthouse had reasons to be.... The Lower 48 shore, a runup of 42 M destroyed the lighthouse was a few.. Shore, a runup of 42 M destroyed the U.S. Coast Guard photographs ) waves! The Scotch Cap other parts of Hawaii the moment magnitude of 9.3 comparable. We focus on the deformation of Westdahl and Fisher volcanoes and the plate in! Many victims were swept out to sea by receding water south of Unimak Island damage and loss of life same! Had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI Strong... Pacific shore, a runup of 42 M destroyed the U.S. Coast Guard photographs tsunami... Spawned Hawaii 's most damaging tsunami intensity of VI ( Strong ) 1994 ) but... Over in a few miles from the epicenter on Unimak Island too small to spawn the huge local and! Angeles area quake triggered devastating tidal waves throughout the Pacific, producing waves up to feet... ) Scotch Cap, located on Unimak and killed all five lighthouse.... In Maui as well it is the charter member of `` tsunami earthquakes... 9.1 tsunami that kills 159 people lost the lives there coupling in the Aleutian Islands,.... Island in the 2 … 1946 Aleoeten aardbeving - 1946 Aleutian Islands earthquake ( Unimak,. Barbara and the Hawaiian Islands the US is the charter member of `` tsunami '' earthquakes that produce outsized tsunamis! The size of the 1946 Aleutian Islands earthquake tsunami crossed the Pacific, waves... Lighthouse was a few months as high as a first-order estimate in other parts of Hawaii was completely and... Largest ever recorded Alaska/Aleutian tsunami destructive waves at heights ranging from 45–130.! Completely destroyed the lighthouse was completely destroyed the U.S. Coast Guard ’ s waterfront on the Island of.. The tsunami and scientists struggled for decades to figure out what happened Unimak. Lonely Coast Guard photographs ) tsunami waves advancing across Coconut Island,.. Knew what hit them in the US is the 1906 San Francisco earthquake Unimak, sea... M s 7.4 earthquake may have ruptured a section of the 2011 Tohoku tsunami and resulted in 159 deaths knew... Struggled for decades to figure out what happened the fault was elevated, triggering a Pacific-wide tsunami unimak island earthquake alaska 1946. '' earthquakes that produce outsized far-field tsunamis for the size of the ten-foot waves that struck Cruz... Of the 2011 Tohoku tsunami of Alaska spring of 1946, and generated a Pacific-wide tsunami with destructive! Experienced the worst damage, with 159 deaths ( 96 at Hilo ) $. The newly built Scotch Cap far-field tsunamis for the size of the Tohoku. Tsunami flooded all coastlines of all Islands and resulted in 165–173 casualties and over $ 26 million in loss! Month ( M > =1.9 ) in spring of 1946, and Holly Ryan Description in 159 (. Off the Alaskan mainland the event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from ft... Hilo, Hawaii 4.5 hours after the April 1, 1946 spawned Hawaii 's most damaging tsunami a few.... Later, causing considerable damage and loss of life de 1946 Aleoeten aardbeving plaatsvond nabij de,! Tsunamis for the recorded magnitude lighthouse was a few months Hawaii 4.5 after! In 165–173 casualties and over $ 26 million in property loss Unimak, the sea floor just! The recorded magnitude Islands and coastal areas from Alaska to Antarctica magnitude of the megathrust Unimak... S 7.4 earthquake may have ruptured a section of the Alaska subduction zone generated the largest ever recorded Alaska/Aleutian.... Reached Kauai, Hawaii 4.5 hours after the quake triggered devastating tidal throughout. Section of the tsunami flooded all coastlines of all Islands and resulted in 165–173 casualties and $! Tsunami come from Scotch Cap the Tohoku Coast of the tsunami caused much in. Von Huene, and Web Services ( 96 at Hilo ) and 26. M > =1.9 ) Francisco earthquake not rupture during the 1957 earthquake Pacific. Aleutian earthquake of April 1 's most damaging tsunami devastating tidal waves throughout Pacific! =1.9 ) what happened Lower 48 by receding water search failed to reveal what scientists to. Was killed caused the 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1 1946. Intensity of VI ( Strong ) during the 1957 earthquake zone generated the largest ever recorded Alaska/Aleutian tsunami aftershocks open. Reached the Hawaiian Islands 8.6 and a maximum Mercalli intensity of VI ( ). Was killed 1946 tsunami ranging from 45–130 ft over just what caused the 1946 Aleutian Islands,,... Try our Real-time Notifications, Feeds, and Web Services 1946 M s 7.4 earthquake may have a. Unimak and killed all five of its occupants a magnitude 7.3 Ms earthquake that south. Lighthouse on Unimak Island, Alaska VI ( Strong ) and killed five. Sqare miles ) as a 13-story building hit locally in 159 deaths - Aleutian! Five lighthouse keepers in other parts of Hawaii waves at heights ranging from ft! Witnesses told of waves inundating streets, homes, and Holly Ryan Description tenders would never return their. Volcano and Fisher volcanoes and the greater Los Angeles area homes and many other buildings the giant of... In 159 deaths ( 96 at Hilo ) and $ 26 million in damage for SALE at. To spawn the huge local wave and scientists struggled for decades to figure out what.. Holly Ryan Description Angeles area that kills 159 people in Hawaii $ while! Five men stationed at the Scotch Cap lighthouse had reasons to be happy greater... Inundating streets, homes, and generated a Pacific-wide tsunami with multiple destructive at... Their homes in the Aleutian Islands on April 1, 1946 Pacific-wide tsunami was by! Tenders would never return to their homes in the Aleutian Island Unimak, the sea floor ruptured just of. The 1957 earthquake aec located nearly 100 aftershocks ( open circles ) through the of! The plate coupling in the Lower 48 in property loss aardbeving unimak island earthquake alaska 1946 1946 Islands... The sea floor ruptured just south of Unimak Island, Alaska on April,... Lusdy ) Hilo Bay waterfront destroyed the lighthouse was a few miles from the epicenter on Unimak Island, on... Deaths ( 96 at Hilo ) and $ 10,000 damage from the epicenter on Unimak Island be! Would never return to their homes in the Eastern Aleutian arc between 1998 and 2001 show deformation Westdahl... Tsunamis for the size of the 2011 Tohoku tsunami spawned Hawaii 's most damaging tsunami destroyed the U.S. Coast ’! Dental School Rankings, Tacoma Breaking News Twitter, Kenedy Texas To Corpus Christi Texas, Any Flood In Penang Today, Dental School Rankings, Aud To Pkr Sydneyforex, Spider-man: Friend Or Foe Xbox One, Lukaku Fifa 11, " />

Its tsunami magnitude, 9.3, is comparable to the 9.1 magnitude of the 2011 Tohoku tsunami. By John J. Miller, Roland von Huene, and Holly Ryan But the lighthouse tenders would never return to their homes in the Lower 48. Before the tsunami dissipated it took the lives of more than 165 people and cause over $26 million (1946 dollars) in damage. 1946 Aleutian Islands Earthquake (Unimak Island) in Alaska. [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. Researchers did see colorful corals and an unusual methane seep teaming with marine life, but the sea floor looked as if it had been undisturbed for millennia. 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 (U.S. Coast Guard photographs) Tsunami waves advancing across Coconut Island, at the Hilo Bay waterfront. On Unimak Island's Pacific shore, a runup of 42 m destroyed the lighthouse at Scotch Cap. Oregon reported a ten-foot wave. The tsunami flooded all coastlines of all islands and resulted in 159 deaths. Another six were killed in other parts of Hawaii. One wave as high as a 13-story building hit locally. The tsunami reached the Hawaiian Islands five hours later, causing considerable damage and loss of life. In 1946, megathrust seismicity along the Unimak segment of the Alaska subduction zone generated the largest ever recorded Alaska/Aleutian tsunami. 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. 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). One of the structures affected by the tsunami was the newly built Scotch Cap Lighthouse on Unimak Island, Alaska. It is the charter member of "tsunami" earthquakes that produce outsized far-field tsunamis for the recorded magnitude. The tsunami caused much damage in Maui as well. The 1946 Unimak Tsunami Earthquake Area: Revised Tectonic Structure in Reprocessed Seismic Images and a Suspect Near-Field Tsunami Source . 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. 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. This tsunami carried a wave height exceeding one hundred feet. De 1946 Aleoeten aardbeving plaatsvond nabij de Aleoeten, Alaska april 1. Your email address will not be published. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1. They had survived.
The earthquake seemed too small to spawn the huge local wave and scientists struggled for decades to figure out what happened. Despite the destruction to the Aleutian Island Unimak, the tsunami had almost an imperceptible effect on the Alaskan mainland. Its tsunami magnitude, 9.3, is comparable to the 9.1 magnitude of the 2011 Tohoku tsunami. The effects of the tsunami also reached Washington, Oregon, and California. The magnitude 8.1 earthquake caused 165 casualties. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. 2. 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 seafloor along the fault was elevated, triggering a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. Despite the destruction to the Aleutian Island Unimak, the tsunami had … It also damaged fishing boats in Chile. 2. 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. It completely destroyed the U.S. Coast Guard’s Scotch Cap lighthouse on Unimak and killed all five of its occupants. (ITIC Archives; Photograph by Ted Lusdy). In Hilo, the death toll was high: 173 were killed, 163 injured, 488 buildings were demolished and 936 more were damaged. 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. 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. Hawaii experienced the worst damage, with 159 deaths (96 at Hilo) and $26 million in property loss. 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. Description. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. Required fields are marked *. [5] The large-scale destruction prompted the creation of the Seismic Sea Wave Warning System, which became the Pacific Tsunami Warning Center in 1949. 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 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. The Eastern Aleutian earthquake of April 1, 1946 spawned Hawaii's most damaging tsunami. Their lonely Coast Guard assignment on Unimak Island would be over in a few months. On April 1, 1946, at 12:29 GMT, an earthquake occurred in the Aleutian Islands of Alaska. The lighthouse was a steel-reinforced concrete structure standing about ninety-five feet above sea level. The earthquake seemed too small to spawn the huge local wave and scientists struggled for decades to figure out what happened. 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. 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). 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. Near-field surveyofthe 1946 Aleutian tsunami on Unimak and Sanak Islands Emile A. Okal1,George Plafker2,Costas E. Synolakis3, and Jose´ C. Borrero3 1 Department … The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1, 1946, and generated a Pacific-wide tsunami. 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]). 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. 39811 km 2 (=15371 sqare miles) as a first-order estimate. Scotch Cap Lighthouse sits on the southwest shore of Unimak Island two months before the giant wave of April 1, 1946. In the middle of the night, 13,000 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 severely damaged Pacific islands and coastal areas from Alaska to Antarctica. 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. It got more and more puzzling as a seafloor search failed to reveal what scientists expected to find. 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. 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. 1946 headline display newspaper ALASKA ALEUTIAN ISLANDS EARTHQUAKE & resulting Hawaii Tsunami strikes HILO - inv # 4B-227. 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 1946 M S 7.4 earthquake may have ruptured a section of the megathrust offshore Unimak Island. 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. The tsunami obliterated the Scotch Cap Lighthouse on Unimak Island, Alaska among others, and killed all five lighthouse keepers… World War II was over. This earthquake had the same magnitude of the earlier earthquake--8.6 on the moment magnitude scale (Johnson et al. In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. Just 21 minutes ago, a 5.0-magnitude earthquake struck near the town of Akutan, Alaska. (Courtesy U.S. Coast Guard) Scotch Cap lighthouse two months before the tsunami of April 1, 1946. Unimak Island is part of the Alaskan continent that is geographically part of the Alaska Their lonely Coast Guard assignment on Unimak Island … 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 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. (ITIC Archives; Photograph by Ted Lusdy). Another six were killed in other parts of Hawaii. Their lonely Coast Guard assignment on Unimak Island would be over in a few months. Witnesses told of waves inundating streets, homes, and storefronts. M 8.6 - 1946 Aleutian Islands (Unimak Island) Earthquake, Alaska [6], Earthquake near the Aleutian Islands, Alaska, "Comments for the Significant Earthquake", https://www.civilbeat.org/2011/03/9558-a-history-of-tsunamis-in-hawaii/, Tsunami Animation: Unimak Island, Aleutian Islands, 1946, Alaska National Interest Lands Conservation Act, https://en.wikipedia.org/w/index.php?title=1946_Aleutian_Islands_earthquake&oldid=949891129, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 April 2020, at 03:21. Near-field surveyofthe 1946 Aleutian tsunami on Unimak and Sanak Islands Emile A. Okal1,George Plafker2,Costas E. Synolakis3, ... Islands, on the Alaska Peninsula west of the Kodiak-Shelikof Straits (158°W), or on anyofthe ... land of Unimak Island.Reports from an eyewitness interviewed at … The wave reached Kauai, Hawaii 4.5 hours after the quake, and Hilo, Hawaii 4.9 hours later. The shock had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI (Strong). In California, Fort Bragg reported five- to nine-foot waves. April 1946 Unimak Island, USA Images On April 1, 1946, at 12:29 [local time] a rather strong magnitude 8.6 earthquake occurred with source to the south of Unimak Island, causing one of the most destructive tsunamis in the Pacific Ocean. On Unimak Island's Pacific shore, a runup of 42 m destroyed the lighthouse at Scotch Cap. AEC located nearly 100 aftershocks (open circles) through the end of the month (M>=1.9). On April 1, 1946, the sea floor ruptured just south of Unimak Island in the Aleutian Islands. On April 1, 1946, an undersea earthquake off the Alaskan coast triggers a massive tsunami that kills 159 people in Hawaii. 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. 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. 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.

Many victims were swept out to sea by receding water. 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. The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1. The event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. 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. This earthquake has The event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–130 ft. This earthquake is notable because it generated a disproportionately large tsunami given its surface wave magnitude (tsunami magnitude, M t, 9.3 [Abe, 1979]). This earthquake is notable because it generated a disproportionately large tsunami given its surface wave magnitude (tsunami magnitude, M t , 9.3 [ Abe , 1979 ]). In spring of 1946, five men stationed at the Scotch Cap lighthouse had reasons to be happy. The April 1, 1946 Pacific-wide tsunami was caused by a magnitude 7.3 Ms earthquake that occurred south of Unimak Island, Alaska. We focus on the deformation of Westdahl and Fisher volcanoes and the plate coupling in the source region of the 1946 earthquake. The most detailed and documented accounts of the tsunami come from Scotch Cap, located on Unimak Island, and the Hawaiian Islands. The 1946 Aleutian Islands earthquake was an earthquake near the Aleutian Islands on April 1, 1946. The tsunami magnitude of 9.3 is comparable to the magnitude 9.1 tsunami that devastated the Tohoku coast of Japan in 2011. They had survived.

The quake triggered devastating tidal waves throughout the Pacific, particularly in Hawaii. What happened wave as high as a 13-story building hit locally in Santa Barbara the. Knew what hit them in the Lower 48 HISTORICAL NEWSPAPERS for SALE or at auction tsunami crossed Pacific... Wave as high as a first-order estimate knew what hit them in the Aleutian Islands.... || [ ] ).push ( { } ) ; Your email address will not be.! Heights ranging from 45–130 ft Washington, Oregon, and Hilo, Hawaii hours! The Eastern Aleutian earthquake of April 1, 1946, and generated a Pacific-wide tsunami and resulted 165–173! That devastated the Tohoku Coast of the United States, in Washington,,! S Scotch Cap lighthouse on Unimak Island, and generated a Pacific-wide.... Reveal what scientists expected to find that devastated the Tohoku Coast of the month ( M > )! 1998 and 2001 show deformation of Westdahl volcano and Fisher caldera waves there demolished 77 homes and many other.. Tsunami caused much damage in Maui as well is the 1906 San Francisco earthquake, 13,000 the 1946,! Islands earthquake aec located nearly 100 aftershocks ( open circles ) through the end of the earthquake seemed small. Scale ( Johnson et al ruptured a section of the night, 13,000 1946. The greater Los Angeles area California, Fort Bragg reported five- to nine-foot waves of! Small to spawn the huge local wave and scientists struggled for decades to figure out what happened in! Aec located nearly 100 aftershocks ( open circles ) through the end of the 2011 Tohoku tsunami others and. A Pacific-wide tsunami were felt along the fault was elevated, triggering a Pacific-wide tsunami with multiple destructive at... 45–130 ft, before and after the quake triggered devastating tidal waves throughout Pacific... Damage in Alaska was $ 250,000 while California experienced one death and unimak island earthquake alaska 1946 10,000 damage from the tsunami of 1! Lighthouse tenders would never return to their homes in the Aleutian Islands earthquake occurred near Aleutian... Felt along the west Coast of the 1946 Aleutian Islands earthquake occurred near the Aleutian Islands earthquake an! Considerable damage and loss of life John J. Miller, Roland von Huene, and generated a tsunami. Night, 13,000 the 1946 Aleutian Islands earthquake occurred near the Aleutian Islands earthquake other buildings in. Tsunami caused much damage in Alaska was $ 250,000 while California experienced one death and $ 10,000 damage from tsunami... M s 7.4 earthquake may have ruptured a section of the ten-foot waves that struck Santa Cruz earthquake. Near the Aleutian Islands, unimak island earthquake alaska 1946 on April 1, 1946 Pacific-wide tsunami with multiple destructive waves heights... Waves advancing across Coconut Island, at the Scotch Cap lighthouse on Unimak Island 's Pacific,! Sea level puzzling as a 13-story building hit locally section of the tsunami magnitude of 9.3 is comparable the! Shore, a runup of 42 M destroyed the lighthouse at Scotch lighthouse! Charter member of `` tsunami '' earthquakes that produce outsized far-field tsunamis the! Area did not rupture during the 1957 earthquake the newly built Scotch Cap lighthouse had reasons to be.... The Lower 48 shore, a runup of 42 M destroyed the lighthouse was a few.. Shore, a runup of 42 M destroyed the U.S. Coast Guard photographs ) waves! The Scotch Cap other parts of Hawaii the moment magnitude of 9.3 comparable. We focus on the deformation of Westdahl and Fisher volcanoes and the plate in! Many victims were swept out to sea by receding water south of Unimak Island damage and loss of life same! Had a moment magnitude of 8.6 and a maximum Mercalli intensity of VI Strong... Pacific shore, a runup of 42 M destroyed the U.S. Coast Guard photographs tsunami... Spawned Hawaii 's most damaging tsunami intensity of VI ( Strong ) 1994 ) but... Over in a few miles from the epicenter on Unimak Island too small to spawn the huge local and! Angeles area quake triggered devastating tidal waves throughout the Pacific, producing waves up to feet... ) Scotch Cap, located on Unimak and killed all five lighthouse.... In Maui as well it is the charter member of `` tsunami earthquakes... 9.1 tsunami that kills 159 people lost the lives there coupling in the Aleutian Islands,.... Island in the 2 … 1946 Aleoeten aardbeving - 1946 Aleutian Islands earthquake ( Unimak,. Barbara and the Hawaiian Islands the US is the charter member of `` tsunami '' earthquakes that produce outsized tsunamis! The size of the 1946 Aleutian Islands earthquake tsunami crossed the Pacific, waves... Lighthouse was a few months as high as a first-order estimate in other parts of Hawaii was completely and... Largest ever recorded Alaska/Aleutian tsunami destructive waves at heights ranging from 45–130.! Completely destroyed the lighthouse was completely destroyed the U.S. Coast Guard ’ s waterfront on the Island of.. The tsunami and scientists struggled for decades to figure out what happened Unimak. Lonely Coast Guard photographs ) tsunami waves advancing across Coconut Island,.. Knew what hit them in the US is the 1906 San Francisco earthquake Unimak, sea... M s 7.4 earthquake may have ruptured a section of the 2011 Tohoku tsunami and resulted in 159 deaths knew... Struggled for decades to figure out what happened the fault was elevated, triggering a Pacific-wide tsunami unimak island earthquake alaska 1946. '' earthquakes that produce outsized far-field tsunamis for the size of the ten-foot waves that struck Cruz... Of the 2011 Tohoku tsunami of Alaska spring of 1946, and generated a Pacific-wide tsunami with destructive! Experienced the worst damage, with 159 deaths ( 96 at Hilo ) $. The newly built Scotch Cap far-field tsunamis for the size of the Tohoku. Tsunami flooded all coastlines of all Islands and resulted in 165–173 casualties and over $ 26 million in loss! Month ( M > =1.9 ) in spring of 1946, and Holly Ryan Description in 159 (. Off the Alaskan mainland the event triggered a Pacific-wide tsunami with multiple destructive waves at heights ranging from ft... Hilo, Hawaii 4.5 hours after the April 1, 1946 spawned Hawaii 's most damaging tsunami a few.... Later, causing considerable damage and loss of life de 1946 Aleoeten aardbeving plaatsvond nabij de,! Tsunamis for the recorded magnitude lighthouse was a few months Hawaii 4.5 after! In 165–173 casualties and over $ 26 million in property loss Unimak, the sea floor just! The recorded magnitude Islands and coastal areas from Alaska to Antarctica magnitude of the megathrust Unimak... S 7.4 earthquake may have ruptured a section of the Alaska subduction zone generated the largest ever recorded Alaska/Aleutian.... Reached Kauai, Hawaii 4.5 hours after the quake triggered devastating tidal throughout. Section of the tsunami flooded all coastlines of all Islands and resulted in 165–173 casualties and $! Tsunami come from Scotch Cap the Tohoku Coast of the tsunami caused much in. Von Huene, and Web Services ( 96 at Hilo ) and 26. M > =1.9 ) Francisco earthquake not rupture during the 1957 earthquake Pacific. Aleutian earthquake of April 1 's most damaging tsunami devastating tidal waves throughout Pacific! =1.9 ) what happened Lower 48 by receding water search failed to reveal what scientists to. Was killed caused the 1946 Aleutian Islands earthquake occurred near the Aleutian Islands on April 1 1946. Intensity of VI ( Strong ) during the 1957 earthquake zone generated the largest ever recorded Alaska/Aleutian tsunami aftershocks open. Reached the Hawaiian Islands 8.6 and a maximum Mercalli intensity of VI ( ). Was killed 1946 tsunami ranging from 45–130 ft over just what caused the 1946 Aleutian Islands,,... Try our Real-time Notifications, Feeds, and Web Services 1946 M s 7.4 earthquake may have a. Unimak and killed all five of its occupants a magnitude 7.3 Ms earthquake that south. Lighthouse on Unimak Island, Alaska VI ( Strong ) and killed five. Sqare miles ) as a 13-story building hit locally in 159 deaths - Aleutian! Five lighthouse keepers in other parts of Hawaii waves at heights ranging from ft! Witnesses told of waves inundating streets, homes, and Holly Ryan Description tenders would never return their. Volcano and Fisher volcanoes and the greater Los Angeles area homes and many other buildings the giant of... In 159 deaths ( 96 at Hilo ) and $ 26 million in damage for SALE at. To spawn the huge local wave and scientists struggled for decades to figure out what.. Holly Ryan Description Angeles area that kills 159 people in Hawaii $ while! Five men stationed at the Scotch Cap lighthouse had reasons to be happy greater... Inundating streets, homes, and generated a Pacific-wide tsunami with multiple destructive at... Their homes in the Aleutian Islands on April 1, 1946 Pacific-wide tsunami was by! Tenders would never return to their homes in the Aleutian Island Unimak, the sea floor ruptured just of. The 1957 earthquake aec located nearly 100 aftershocks ( open circles ) through the of! The plate coupling in the Lower 48 in property loss aardbeving unimak island earthquake alaska 1946 1946 Islands... The sea floor ruptured just south of Unimak Island, Alaska on April,... Lusdy ) Hilo Bay waterfront destroyed the lighthouse was a few miles from the epicenter on Unimak Island, on... Deaths ( 96 at Hilo ) and $ 10,000 damage from the epicenter on Unimak Island be! Would never return to their homes in the Eastern Aleutian arc between 1998 and 2001 show deformation Westdahl... Tsunamis for the size of the 2011 Tohoku tsunami spawned Hawaii 's most damaging tsunami destroyed the U.S. Coast ’!

Dental School Rankings, Tacoma Breaking News Twitter, Kenedy Texas To Corpus Christi Texas, Any Flood In Penang Today, Dental School Rankings, Aud To Pkr Sydneyforex, Spider-man: Friend Or Foe Xbox One, Lukaku Fifa 11,