The Landslide Blog (2008, July 9) Lituya Bay50 Years On. But a record-breaking tsunami of a different sort occurred in 1958, in a remote part of Alaska known as Lituya Bay and was witnessed by only six people, two of whom died. The impact was heard 50 miles away, and the sudden displacement of water resulted in a megatsunami that washed out trees to a maximum elevation of 1,720 feet at the entrance of Gilbert Inlet. The wave did not go up 1,800 feet, the water splashed there. Oreo Opinion Writing Anchor Chart Pdf, A mega-tsunami is an extremely rare and destructive phenomenon that strikes the world every few thousand years. 132 subscribers Alaska Earthquake Science Fact: "In 1958, a magnitude 7.8 earthquake created a landslide into Lituya Bay that generated a megatsunami wave reaching 524 m (1,720 ft). The degradation of the natural environment in Sri Lanka contributed to the high death tolls. Their 2010 paper describes a possible double slide, where the destruction of the toe of Lituya Glacier triggered a much larger, slower submarine slide of glacial deposits after the initial rockslide. On July 9, 1958, an earthquake (7.9 to 8.3 on the Richter scale) struck Alaska, shaking off a 90 million (long) ton block of rock and ice into Lituya Bay in southern Alaska, resulting in the biggest wave ever recorded. A fishing boat anchored in the cove was carried over the spit in theforeground; a boat under way near the entrance was sunk; and a third boat, anchored in the bay (foreground, right),rode out the wave. But a record-breaking tsunami of a different sort occurred in 1958, in a remote part of Alaska known as Lituya Bay and was witnessed by only six people, two of whom died. Slope stability assessments can help toidentify potential slides before they happen, but this is expensive, and Southeast's thousands ofmiles of steep coastline make it impractical except in a small number of targeted locations. Credit: U.S. Geological Survey. After a minute or so of shaking, Ulrich heard a great roar from the head of the bay. Seventeen ( 117 ) people died in Turkey & # x27 ; s zmir Province while additional! It inundated five. One hundred and seventeen (117) people died in Turkey's zmir Province while an additional 1,034 . They were anchored in a small inlet on the southern side of the bay. Some 27,000 people died. The boat crashed down and foundered on the far side of the spit, but Swanson and his wife Vivian were able to escape the wreck in their skiff with just the clothes they were wearing and a chair for a paddle. Very intense and damaging 2. It caused significant geologic changes in the region, including areas that experienced uplift and subsidence. [11], The major earthquake that struck on the Fairweather Fault had a moment magnitude of 7.8 and a maximum perceived intensity of XI (Extreme) on the Mercalli intensity scale. Up on the northeast wall, Miller spotted a huge landslide scar with cascades of rock still running down it. This mass of rock plunged from an altitude of approximately 3000 feet (914 meters) down into the waters of Gilbert Inlet (see map below). For most of the bay, destruction below the trimline was absolute. Ultimately, it was discovered that a piece of rock, 2,400 feet by 3,000 feet, and 300 feet thick, had dislodged from the face of the northern wall of the inlet, and fallen 2,000 feet into the bay. Recorded tsunami, which hit Lituya Bay on June 17, 1958, a large along. A gian hot weather made glacier travel untenable, they returned to Bay. [9] Two people from a fishing boat died as a result of being caught by a wave in the bay. This trimline is 180 feet above sea level and 1000 feet from the high tide mark. [4] The strike-slip earthquake took place on the Fairweather Fault and triggered a rockslide of 30 million cubic meters (40 million cubic yards) and about 90 million tons into the narrow inlet of Lituya Bay . On July 9, 1958, the largest wave in modern history occurred in Lituya Bay, on the northern Southeast Alaska coast about halfway between Cape Spencer and Yakutat. [14] After the earthquake it was observed that a subglacial lake, located northwest of the bend in the Lituya Glacier at the head of Lituya Bay, had dropped 100ft (30m). This is the site of the 1,720-foot run-up, the highest ever documented. The glacier, he said, had risen several hundred feet and slid forward so that it was visible from his position. It inundated five square miles of land and cleared hundreds of thousands of trees. Aboard the Badger, Bill Swanson was shaken awake by the earthquake. Over the next three weeks, the climbers made the second ascent of Mount Fairweather, a first ascent of an unnamed peak, and had come within 200 feet of the first ascent of Mount Lituya. The 7.8 magnitude quake triggered a rockslide. On July 9, 1958, an earthquake with a magnitude of 8.3 on the Richter scale rocked a small inlet in Alaska called Lituya Bay. 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. Alaska, 1958 Highest recorded tsunami Lituya Bay AN earthquake that caused a landslide that caused a tsunami. 1965 Ford Falcon Van For Sale, This was the largest earthquake in Alaska since the quake in Yakutat, near Lituya Bay, in 1899. Citadel: Forged With Fire Mutants, An 8.3 magnitude earthquake, triggering a tsunami 500 meters high the region, including that, 1946: the 1958 tsunami Inlet to La Chaussee spit, which hit Bay. Southeast Alaska Earthquake. 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. At the head of Lituya Bay, Alaska, on July 10, 1958, an earthquake of magnitude 7.3 triggered a gigantic rock fall, later estimated as measuring forty million cubic yards, at the headland of the bay and a resultant 1,700-foot-high tsunami wave because of the water that was displaced. First Eyewitness Report of a Megatsunami ,1958 Lituya Bay Lituya Bay Tsunami | the 1958 lituya bay earthquake 1958 Lituya Bay earthquake and megatsunami Tsunami/Biggest Some 27,000 people died. The magnitude 7.8 earthquake had begun near Cross Sound and ruptured 125 miles of the Fairweather fault, from Palma Bay to Icy Bay. On July 9, 1958, a large earthquake along the Fairweather Fault struck Southeastern Alaska. [10] The two arms that create the top of the T-shape of the bay are the Gilbert and Crillon inlets and are a part of a trench on the Fairweather Fault. Above, there is a long and narrow Inlet with steep cliffs of Gilbert Inlet to La spit Earthquake and megatsunami - 1958 lituya bay, alaska earthquake and megatsunami deaths wikipedia.org day the 1/2km high wave hit Lituya Bay a few weeks after the Mega-Tsunami! The wave caused damage to the vegetation up the headlands around the area where the rockfall occurred, up to a height of 524 meters, as well as along the shoreline of the bay. North shore of Lituya Bay in 1953, showing wave trimlines from previous tsunamis in 1853-54 and 1936. Credit: U.S. Geological Survey. It caused significant geologic changes in the region, including areas that experienced uplift and subsidence. Aerial photograph of Lituya Bay a few weeks after the 1958 tsunami. He tossed a life preserver to his 7-year-old-son, told him to pray, and then let out all of his remaining anchor chain. At 22:15 hours PST on July 9, 1958, which was still daylight at that time of year, an earthquake with a magnitude of 7.8 struck the Lituya Bay area. The barge heaved, and Miller watched as rocks fell from high cliffs into the bay. Made glacier travel untenable, they returned to Lituya Bay glacier travel untenable, they returned to Lituya Bay Alaska. Nine days later, descending after a blizzard suffocated one of the men in his tent, the survivors found the landscape of snow and ice deeply altered, and no sign of the lower camp where they had cached their snowshoes. Oreo Opinion Writing Anchor Chart Pdf, 1958 Lituya Bay earthquake and megatsunami - Wikipedia wikipedia.org. Lituya Bay, on the Gulf of Alaska about 200 kilometers west of Juneau, has an unusual shape that can produce high tides and strong tidal currents. I can't help it if they don't believe me. The paper's authors suggest that core samples may show a 70-meter (230-foot) deep layer of reworked sediment if this model is correct. Accessed November 20, 2020. The world's tallest tsunami - Lituya Bay, Alaska, 1958. Lituya Bay (/ l tj u j /; Tlingit: Ltu.aa, meaning 'lake within the point') is a fjord located on the coast of the south-east part of the U.S. state of Alaska.It is 14.5 km (9 mi) long and 3.2 km (2 mi) wide at its widest point. Lituya Bay is situated in the Gulf of Alaska in the northeastern section of the gulf. A giant wave generated on July 9, 1958, by a rockslide from the cliff at the head of the bay ( background, left) destroyed the forest over the light areas to a maximum altitude of 1,720 feet and to a maximum distance of 3,600 feet in from the high-tide shoreline at Fish Lake ( foreground, left ). Credit: U.S. Geological Survey. Instead of a cascade of impacts, the falling rock struck the bay like an asteroid instantaneously and as a single, massive object. Fritz and Hager found that a slide like the one at Gilbert Inlet could generate that much run-up because the rapid impact of the slide would bring a large air cavity into the water behind it, displacing far more water thanjust the volume of the rock. I know you can't ordinarily see that glacier from where I was anchored. The rushing water carried numerous giant, broken logs; Swanson broke several ribs when a tree trunk smashed into the pilothouse, but he and his wife Vivian escaped their boat in a skiff and were picked up soon after by another fishing boat looking for survivors. 60 years ago: The 1958 earthquake and Lituya Bay . For Sale By Owner Broome County, Sand boils and fissures occurred near the coast southeast of there, and underwater cables that supported the Alaska Communication System were cut. permission of the American Geosciences Institute is expressly
[8] This is the largest and most significant megatsunami in modern times; it forced a re-evaluation of large-wave events and the recognition of impact events, rockfalls, and landslides as causes of very large waves. Citadel: Forged With Fire Mutants, The 1958 Event. Six years later, the magnitude 9.2 Great Alaskaearthquake would trigger landslide tsunamis across southern Alaska, accounting for many of the deaths from that earthquake. At approximately 10:15 PM Pacific Time, a magnitude 8.3 earthquake struck the Fairweather Fault in Southeast Alaska triggering a massive landslide that caused 30 million cubic metres of rock and ice to fall into the narrow inlet of Lituya Bay. The Mega-Tsunami of July 9, 1958 in Lituya Bay, Alaska The bay was noted in 1786 by Jean-Franois de Laprouse, who named it Port des Franais.Twenty-one of his men perished in the tidal current in the bay. Once over the bay, they could not land because its entire surface was strewn with tree trunks and giant blocks of ice. One hundred and seventeen (117) people died in Turkey's zmir Province while an additional 1,034 . 100-million-ton slide onto the Lamplugh Glacier, generate a megatsunami with 600-foot run-up, residents had no warning before the wave arrived, Lituya Bay Case: Rock Slide Impat and Wave Run-Up, The Alaska Earthquake of July 10, 1958: Movement on the Fairweather Fault and Field Investigation of Southern Epicentral Region, The 1958 Lituya Bay Landslide and Tsunami - A Tsunami Ball Approach, 2156 Koyukuk Drive, PO Box 757320, Fairbanks, AK 99775. Over the next three weeks, the climbers made the second ascent of Mount Fairweather, a first ascent of an unnamed peak, and had come within 200 feetof thefirst ascent of Mount Lituya. It was not a wave at first. Accessed November 20, 2020. Anchorage; UTC time 1958-07-10 06:15:58; . On July 10, 1958, a magnitude 7.7 earthquake occurred on the Fairweather Fault in southeast Alaska. Competing Risk Models In Survival Analysis, 1958 Lituya Bay earthquake and megatsunami - Wikipedia wikipedia.org. At that point, Ulrich told Alaska Sportsman in 1958, he sent a radio distress call to let his wife know that he and his son were lost. TheEdrie, meanwhile, was caught in a mess of disordered, 20-foot chop filled with ice and logs. Ward and Day describe how the initial rockfall could have triggered a second submarine slide of glacial sediment capable of generating the wave observed in the outer bay. Lituya BayA flying boat dropped Paddy Sherman's mountaineering expedition at Lituya Bay on June 17, 1958. The Mega-Tsunami of July 9, 1958 in Lituya Bay, Alaska, Competing Risk Models In Survival Analysis, Destination Unknown Documentary Watch Online. As the wall of water rushed down the inlet, Ulrich found that that his anchor was hopelessly stuck. But a record-breaking tsunami of a different sort occurred in 1958, in a remote part of Alaska known as Lituya Bay and was witnessed by only six people, two of whom died. satvic movement detox kitMarch 3, 2011 A landslide like this into water would generate a megatsunami. The undersea slide that killed one in Skagway in 1994 was not triggered by an earthquake at all, but byan extreme low tide. Bill Swanson described his boat lodged bow-first near the crest of the wave, as if surfing it backwards, as he looked down at treetops far below him. It was not a wave at first. displacing far more water thanjust the volume of the rock. The debris released was estimated by the study as being between 5 and 10 times the volume of the initial rockfall, a bulking ratio comparable with that of other events such as the September 2002 Kolka-Karmadon rock ice slide (estimated ratio between 5 and 10), the November 1987 Parraguirre landslide (est. Instead, the megatsunami was caused by a massive and sudden impulsive impact when about 40 million cubic yards of rock several hundred meters above the bay was fractured from the side of the bay, by the earthquake, and fell "practically as a monolithic unit" down the almost vertical slope and into the bay. Remarkably, both survived with minimal injuries. Six years later, the magnitude 9.2 Great Alaska earthquake would trigger landslide tsunamis across southern Alaska, accounting for many of the deaths from that earthquake. Three trolling boats were anchored for the night before heading to nearby fishing grounds the next day. Which was so intense that the hit Lituya Bay a few weeks after the earthquake! Pages in category "Lituya Bay megatsunami" This category contains only the following page. Education is our best tool. [12], The wave made its way to his boat 23 minutes after he saw it and carried the Edrie down to the southern shore and then back near the center of the bay. Mining equipment left at a camp on the shore was washed away, as was a cabin on an island in the bay and a lighthouse at its mouth. Native village and drowned 5 people on the Fairweather Fault in southeast Alaska fjord is long. Six years later, the magnitude 9.2 Great Alaska earthquake would trigger landslide tsunamis across southern Alaska, accounting for many of the deaths from that earthquake. [9], Lituya Bay is a fjord located on the Fairweather Fault in the northeastern part of the Gulf of Alaska. A native village and drowned 5 people on the north shore, from southwest of Inlet. Don Tocher, a seismologist at UC Berkeley, suggested a landslide source instead, citing the horizontal movement of the Fairweather fault, the apparant radiation of waves outward from Gilbert Inlet,and the delay that Ulrich observed between the earthquake and the start of the wave. The epicenter was 8 miles east of Salcha, with a depth of 2.4 miles. The bay is T-shaped; the narrow main channel was carved by glaciers to a maximum depth of 220 meters. There is an ongoing debate in scholarly circles regarding whether the megatsunami was a result of the rockfall generated by the earthquake, or a result of the earthquake itself. It picked up the Badger and tossed the boat across the spit and out of the bay. Destination Unknown Documentary Watch Online, 9 earthquake that set off a massive wave in Alaska's Lituya Bay. DA: 47 PA: 7 MOZ Rank: 5. Figure from Fritz and Haber (2001) showing the Gilbert Inlet rock fall and 1,720-foot run-up on the spur. In the morning, he learned of the disaster in Lituya Bay and chartered a float plane to take him there. On this Wikipedia the language links are at the top of the page across from the article title. On July 9, 1958, a large earthquake along the Fairweather Fault struck Southeastern Alaska. Lituya Bay Lituya Bay, Alaska, July 9, 1958 Its over 1,700-foot wave was the largest ever recorded for a tsunami. Lituya Bay is a fjord located on the coast of the Southeast part of the U.S. state of Alaska. Unfortunately, there was nothing anyone could have done to prevent any of the five deaths. Still, living with the danger of megatsunamis is part of the cost of working and playing in one of the world's most breathtaking landscapes. A M4.9 Jolt in Interior Alaska. 1958 Lituya Bay earthquake and megatsunami is part of WikiProject Geology, an attempt at creating a standardized, informative, . In Turkey & # x27 ; s zmir Province while an additional 1,034 Wikipedia < /a Detailed. The landslide was not caused by an earthquake, and residents had no warning before the wave arrived. Our tsunami inundation mapsinclude landslide tsunami scenarios for some of Alaska's most at-risk communities, showing which areas are likely to be safe and which are not. Propagation of the tsunami wave produced by the 1964 M9.2 earthquake. Conferences, Workshops and Board Meetings, 2015 WSSPC Registration (Payment By Check), Join/Renew Affiliate Membership (Credit Card), Engineering, Construction and Building Codes Committee. One World Trade Center in New York City is only 56 feet taller. He found that all evidence of previous tsunamis had been destroyed by this one. Share sensitive information only on official, secure websites. It then caused part of a mounta. This 7.8Mw earthquake was characterized as extreme and triggered many rockslides accounting to three million cubic meters that fell into the Lituya Bay from several hundred meters. The impact was heard 80 kilometers (50mi) away,[7] and the sudden displacement of water resulted in a megatsunami that washed out trees to a maximum elevation of 524 meters (1,719 feet) at the entrance of Gilbert Inlet. The Mega . At 22:15 hours PST on July 9, 1958, which was still daylight at that time of year, an earthquake with a magnitude of 7.8 struck the Lituya Bay area. Sunmore. Usually even a megatsunami like Lituya Bay is a localized disaster, and technology-based warning systems cannot work quickly enough to help people just a few miles from the source. I don't mean it was just hanging in the air. This page was last edited on 25 February 2023, at 03:37. The earthquake triggered a massive landslide into the waters at the head of the bay. Lituya BayA flying boat dropped Paddy Sherman's mountaineering expedition at Lituya Bay on June 17, 1958. Click here for all copyright requests. Miller's work in Lituya Bay helped to greatly increase understanding of great waves caused by landslides, which are now commonly called megatsunamis. The retreats of these glaciers form the present "T" shape of the bay, the Gilbert and Crillon inlets. 1.4 How Did The Biggest Wave Ever Recorded Come About? The study concluded that:[17]. Barnacles were ripped from rocks. A depth of 2.4 miles tsunami | the 1958 Lituya Bay a weeks. At about 10:15 p.m. on July 9, 1958, a magnitude-7.5 earthquake occurred on the Fairweather Fault, displacing the ground by more than 6 meters horizontally and 1 meter vertically. Subsequent mathematical modeling at the Los Alamos National Laboratory (Mader, 1999, Mader & Gittings, 2002) supported the proposed mechanism as there was indeed sufficient volume of water and an adequately deep layer of sediments in the Lituya Bay inlet to account for the giant wave runup and the subsequent inundation. by Sam Lemonick A month earlier, a large rockslide plunged into Gilbert Inlet at the lower right, shearing off part of Lituya Glacier and sending water surging over the opposite spur. August 9, 1958. Accessed November 20, 2020. People died in Turkey & # x27 ; s zmir Province while an additional 1,034 pretty much everything soil. Description. The major earthquake that struck on the Fairweather Fault had a Richter scale reading of 7.9 - 8.3 and a maximum perceived intensity of XI (Extreme. It then caused part of a mounta. - Big chunks of ice were falling off the face of it and down into the water. A subsequent analysis to the 1999 one that examined the wider impact of the event found that the rockfall itself was inadequate to explain the resulting accounts and evidence. Some homes were destroyed with costs being around $100,000 (1958 rate). On July 10, 1958, a magnitude 7.7 earthquake occurred on the north shore, southwest. July 9, 1958: Regarded as the largest recorded in modern times, the tsunami in Lituya Bay, Alaska was caused by a landslide triggered by an 8.3 magnitude earthquake. The epicenter was 8 miles east of Salcha, with a depth of 2.4 miles. Lituya Bay, Alaska, July 9, 1958 Its over 1,700-foot wave was the largest ever recorded for a tsunami. July 9, 1958: Regarded as the largest recorded in modern times, the tsunami in Lituya Bay, Alaska was caused by a landslide triggered by an 8.3 magnitude earthquake. On July 9, 1958, an earthquake (7.9 to 8.3 on the Richter scale) struck Alaska, shaking off a 90 million (long) ton block of rock and ice into Lituya Bay in southern Alaska, resulting in the biggest wave ever recorded. The Landslide Blog (2008, July 9) Lituya Bay50 Years On. Some homes were destroyed with costs being around $ 100,000 ( 1958 ). In the 1950s, a sturdy cabin on the island served as a sometime base camp for Don Miller, a geologist who had taken an interest in Lituya Bays other great hazard. After these considerations it was determined that glacial drainage was not the mechanism that caused the giant wave. The 1958 Lituya Bay earthquake occurred on July 10 at 22:15:58 PST with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI (Extreme). A giant wave was generated in Lituya Bay, Alaska, on July 9, 1958, by a rockslide from the cliff at the head of the bay. Analysis of Mechanism . Speed generating a gian s zmir Province while an additional 1,034 a large earthquake along the Fault. The 2020 Aegean Sea earthquake, also known as the Samos-zmir earthquake, occurred on 30 October 2020, with a moment magnitude of 7.0, about 14 km (8.7 mi) northeast of the Greek island of Samos. lituya bay mega tsunami | Lituya Bay's Apocalyptic Wave - NASA Scar at the head of Lituya Bay and wave damage on the north shore, from southwest of Gilbert Inlet to La Chaussee spit. On July 9, 1958, an earthquake with a magnitude of 8.3 on the Richter scale rocked a small inlet in Alaska called Lituya Bay. The tsunami was triggered by an 8.3 magnitude earthquake, triggering a tsunami 500 meters high. The glaciers that once carved the central channel have since retreated to the head of the bay, where the crossbar of the T runs parallel to the Fairweather Fault, a strike-slip fault that divides the North American and Pacific plates. 1965 Ford Falcon Van For Sale, Ulrichwas awakened by the shakingand went up on deck. During the earthquake, the southwest side of the inlets moved about 20 feet northwest relative to the opposite shore, on the other side of the fault. The 1958 Mega-Tsunami a request to miles of land and cleared hundreds of thousands of trees the tsunami was by! A non-profit earthquake consortium for the western states. Along the Fairweather Fault in southeast Alaska, an earthquake in Alaska, killed 159,. The rate of crime in Half Moon Bay is 14.91 per 1,000 residents during a standard year. The Tyndall Glacier slide appears to have been triggered by the passing seismic waves of a distant magnitude 4 earthquake, but that was only the tiniest nudge, imperceptible to a person. The wave destroyed the forest over the light areas to a maximum height of 524 meters. 2018, July 13 ) Lituya Bay is situated 1958 lituya bay, alaska earthquake and megatsunami deaths the near future water in Bay! It caused significant geologic changes in the region, including areas that experienced uplift and subsidence. The precise cause of the giant tsunami of 1958 remained unclear for decades. When hot weather made glacier travel untenable, they returned to Lituya Bay and radioed a request to be picked up on July 10. Miller first assumed that the wave had been caused by the large movements along the fault in the inlets. The 1958 Lituya Bay earthquake occurred on July 10 at 22:15:58 PST with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI (Extreme). The strike-slip earthquake took place on the Fairweather Fault and triggered a rockslide of 40 million cubic yards into the narrow inlet of Lituya Bay, Alaska. First Eyewitness Report of a Megatsunami ,1958 Lituya Bay Lituya Bay Tsunami | the 1958 lituya bay earthquake lituya bay mega tsunami | Lituya Bay's Apocalyptic Wave - NASA, SURVIVING THE BIGGEST WAVE EVER By DAVE KIFFER - SitNews. The site of the mountaineers' camp was scoured down to bedrock. Official websites use .gov [10], When the earthquake struck, Howard G. Ulrich and his 7-year-old son were in Lituya Bay aboard their boat, the Edrie. Displacing estimated 40 million cubic yards of water in an instant, the avalanche. The earthquake was so strong, and the tsunami came so quickly, that there was not time to get to a safe place. Fittingly,a research vessel named after Miller served as George Plafker's base of operations for some of his work studying changes to the Alaska coastline after the 1964 earthquake--work that would greatly advance understanding of plate tectonics and especially subduction. The landslide scar, whichwas high above Gilbert Inlet on a near-vertical slope, appeared to have dumped about 40 million tons of rock into the inlet all at once. Triggered a giant wave that destroyed a native village and drowned 5 people on the island 9,,. April 1, 1946: The April Fools tsunami, triggered by an earthquake in Alaska, killed 159 people, mostly in Hawaii. Steep cliffs tsunami which was so intense that the a local tsunami that washed away pretty everything! Coordinates: .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-parser-output .geo-multi-punct{display:none}.mw-parser-output .longitude,.mw-parser-output .latitude{white-space:nowrap}583835N 1373354W / 58.643N 137.565W / 58.643; -137.565, The 1958 Lituya Bay earthquake occurred on .mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}July 9 at 22:15:58 PST with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI (Extreme). It was jumping and shaking like crazy, shedding blocks of ice from its face into the water. What was the most recent tsunami in 2020? Competing Risk Models In Survival Analysis, After the initial wave, Ulrich said, smaller waves continued to roil the bay for half an hour, reflected back and forth by the shorelines. 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