Pure Appl. The Icy Bay landslide in Alaska: a nice video describing the link with glacial melting. AGORA, HINARI, OARE, INASP, CrossRef and COUNTER. Oxford Suzhou Centre for Advanced Research, © 2019 Macmillan Publishers Limited, part of Springer Nature. The landslide occurred on the evening of 17 June, in the barren Karrat Fjord on the west coast of Greenland. Having detected the Tyndall Glacier landslide, Stark and Ekstrom located it with a very high resolution satellite image, which Lamont-Doherty have included in their press release : That disturbance pushed water levels up by more than 90 metres along the coastline on the same side as the slide. GNS Science has posted a nice video in which Dr Chris Massey explains some of the key features of the landslides, and the work they are doing to try to monitor them: Posted in: A 200 million-ton landslide landed on the toe of Tyndall Glacier and in the water of Taan Fiord on Oct. 17, 2015, Icy Bay, Alaska. The evacuated subaerial landslide area and runout are visible to the left of the fjord head. The video features Dr Michael Loso, physical scientist at Wrangell-St. Elias National Park. A much more recent slope failure event in 2015 in Taan Fiord to the east produced a tsunami reaching as high as 193 meters (633 ft), and the researchers say these failures can be … And in 2015, a landslide-generated tsunami in the Taan Fjord in Icy Bay, Alaska, caused a 300-metre run-up of water, says Synolakis. “Landslide-generated tsunamis are much more locally limited than tsunamis produced by sea quakes, but they can be massively tall and devastating in the vicinity,” says Hermann Fritz, an environmental engineer at the Georgia Institute of Technology in Atlanta who led the research team. Icy Bay [near Taan Fjord] was full of glaciers as recently as 100 years ago.” A giant boulder moved by the tsunami as it ran down Taan Fjord. And although the tsunami dissipated quickly as it crossed the deep, six-kilometre-wide fjord, it still had enough energy to send water 50 metres up the hillside opposite. At Taan Fjord in 2015, a landslide caused a tsunami that crested at 600 feet. The landslide, pictured above, occurred on 17th October 2015 occurred on the flanks of Taan Fjord in Icy Bay in Alaska. This landslide-generated tsunami had a maximum height of over 600 feet. More recently, a 2015 landslide at Taan Fjord in a remote area west of Yakutat, Alaska, spawned a tsunami that was initially more than 600 feet high. A 2015 Taan Fjord slope failure caused a 193-meter (or 633 feet) tsunami. I featured this landslide, which was detected via the seismic detection system developed by Goran Ekstrom and Colin Stark, in a blog post at the start of this year. The team also measured an increase in water levels of about 10 metres on shorelines 30 kilometres away. Save my name, email, and website in this browser for the next time I comment. The horrible landslide in Taiwan 屏東恐怖的山崩 - Duration: 5:10. Tsunami-inducing landslides are rare but have occurred in Alaska and elsewhere. Taan Fiord is about 100 km from the nearest town, Yakutat, AK. Seismologists returning from studying the rare event hope that the data they have collected will improve models of landslide mechanics in glacial areas and provide a better understanding of the associated tsunami risks. The wave traveled down the fjord, dislocating sediment and … “But with global warming and sea level rise, such landslides are going to be far more common.”. “We need at least ten such events to be able to have some rudimentary confidence in landslide computational models to study future impacts and establish early warning criteria.”. For the best commenting experience, please login or register as a user and agree to our Community Guidelines. Scientists hope studying last month’s deadly event will improve modelling of rockslides that could become more frequent with climate change. At Taan Fjord in 2015, a landslide caused a tsunami that crested at 600 feet. Fritz adds that the Greenland event is reminiscent of a 1958 tsunami — the tallest ever recorded1 — in Lituya Bay, Alaska. The looming tsunami of Harriman Fjord He is particularly interested in climate, oceanography, fisheries and the Earth sciences. Tyndall Glacier, the source of the fjord, retreated 10 miles from 1961 to 1991. And in 2017, a landslide in Greenland produced a tsunami that roared into a small, isolated community. Some of the rock slid onto the snout of a tidewater glacier but most slid into the head of Taan Fjord – displacing a massive volume of water. Synolakis says that his team has documented in detail only two landslides near glaciers. The tsunami wreaked havoc on the small village of Nuugaatsiaq, located on an island within a fjord. Vegetation loss is clear near the water line. A magnitude-8.3 quake triggered a landslide into a narrow fjord and the bay’s shallow water, causing the water to rise 500 metres above the normal tide level (a measure known as run-up). Tsunami in Kesennuma city, ascending the Okawa river - Duration: 25:49. clancy688 Recommended for you. Because this is a recently deglaciated fjord with steep slopes and crossed by a major fault, one possibility was a landslide-generated tsunami. This landslide-generated tsunami had a maximum height of over 600 feet. The tsunami was triggered by a landslide on October 17, 2015, at the head of the fjord. Before joining Nature, Quirin worked as a cartographer. landslide video On 17 October 2015, a landslide of roughly 60 × 10 6 m 3 occurred at the terminus of Tyndall Glacier in Taan Fiord, southeastern Alaska. 166, 153–175 (2009). The slide was so large that it generated a seismic signal suggestive of a magnitude-4.1 earthquake, confounding initial efforts to identify its cause, says Trine Dahl-Jensen, a seismologist at the Geological Survey of Denmark and Greenland. In the next article, we want to talk to you about the cause of the worst tsunami ever recorded in history. More recently, a 2015 landslide near Alaska’s Taan Glacier produced a 633 feet (193 meter) wave in Taan Fjord that smashed into the opposite wall of the glacial valley. A very nice video has been posted on Youtube describing the link between the giant Icy Bay landslide in Alaska in 2015 (this landslide is also variously known as the Taan Fjord landslide and the Tyndall Glacier landslide), which is the largest known recent landslide in North America, and the melting of the adjacent glacier. Approximately 90% of the landslide entered the fjord, generating a tsunami. But more careful examination indicated no significant tectonic activity just before the landslide. “In Taan Fiord (Icy Bay, Alaska), a landslide that began moving slowly decades ago suddenly failed in October 2015. Site, The Icy Bay / Tyndall Glacier landslide via Chris Larsen at the Geophysical Institute of The University of Alaska Fairbanks. It caused a tsunami that inundated an area over 20 km 2, whereas the landslide debris itself deposited within a much smaller area of approximately 2 km 2. Taan Fiord, Alaska, U.S. It triggered a megatsunami with an initial height of 100 metres (328 ft) and a run-up on the opposite shore of the fjord of 193 metres (633 ft). The 2015 Taan Fjord landslide generated a 633 foot high tsunami, for example. Greenland once lost nearly all its ice — and could again. partner of AGORA, HINARI, OARE, INASP, CrossRef and COUNTER, Chunks of glacier shattered when a powerful tsunami ripped through a fjord, Tsunami alerts fail to bridge the ‘last mile’, Deputy Director of Nanoscopy Center in SLST, ShanghaiTech, Vice Dean for Faculty Affairs in School of Life Science and Technology (SLST), ShanghaiTech University. © 2019 Macmillan Publishers Limited, part of Springer Nature. READ ALSO: The Year 2100 Will See the Fastest Melting of Greenland’s Ice Sheet in the Last 12 Millennia. The wave traveled down the fjord, dislocating sediment and … Fritz, H. M., Mohammed, F. & Yoo, J. It caused a sudden surge of seawater that wreaked havoc in the fishing village of Nuugaatsiaq, located on an island within the fjord about 20 kilometres away (see ‘Greenland tsunami’). Fritz and his team hope to produce a 3D reconstruction of the Greenland event. Many thanks to Nathan Soboleff for pointing this one out to me. In Greenland, a 2017 landslide-caused tsunami killed four people. A very nice video has been posted on Youtube describing the link between the giant Icy Bay landslide in Alaska in 2015 (this landslide is also variously known as the Taan Fjord landslide and the Tyndall Glacier landslide), which is the largest known recent landslide in North America, and the melting of the adjacent glacier. By comparison, the 2011 quake-triggered tsunami in Japan, which killed more than 16,000 people and caused the Fukushima nuclear disaster, reached only about 40 metres at its maximum height. Courtesy of Ground Truth Trekking World News - US - Researchers warn of unprecedented mega tsunami if ice melts in Alaska - Scientists fear an unprecedented mega tsunami could occur if Alaska's ice melt occurs CAMEROON MAGAZINE - CAMEROUN INFO - CAMEROUN ACTU Alaska, Glacier, Landslide, Megatsunami, Nature World News, Prince William Sound, Tsunami, US, World News - US - Researchers warn of unprecedented mega tsunami … Both of these events thankfully occurred in sparsely populated areas, so few fatalities occurred. What matters in science — and why — free in your inbox every weekday. As noted above, this is the largest recorded landslide in North America, with a volume of about 72 million cubic metres and a mass of about 180 million tonnes. Icy Bay (Alaska) Landslide: On Saturday, 17 October 2015, a major landslide occurred at the head of Taan Fiord, a finger of Icy Bay. The landslide generated a large tsunami that caused extensive damage along the flanks of Taan Fjord. All Rights Reserved. More recently in 2015, a landslide in Taan Fjord sent roughly 10 million cubic yards of material tumbling into the waters of the remote area west of Yakutat, Alaska and caused a tsunami … The landslide flowed into Taan Fjord, triggering a localised tsunami that was detected 155 km away, according to the Lamont-Doherty press release. A giant, catastrophic tsunami in Alaska triggered by a landslide of rock left unstable after glacier melting is likely to occur in the next two decades, scientists fear – and it could happen within the next 12 months. Chunks of glacier shattered when a powerful tsunami ripped through a fjord in western Greenland in June. And a landslide on the west coast of Greenland in 2017 created a wave, initially more than 300 feet high, that destroyed much of a nearby fishing village and killed four people. In 2015, a similar landslide, on a slope that had also crept for decades, created a tsunami that sheared off forests 193 meters up the slopes of Alaska’s Taan Fiord. Landsat 8 image of Taan Fiord acquired in 2016. A group of scientists warned of the prospects of this impending disaster in Prince William Sound in […] 25:49. A research team that visited the site earlier this month found that a large volume of rock had plunged — probably spontaneously — from one of the steep sides of the fjord into the water 1,000 metres below, and shattered chunks of a glacier. Such information is sorely needed, says Costas Synolakis, a tsunami researcher at the University of Southern California in Los Angeles who was not involved in the Greenland survey. 1 Comment/Trackback ». One of the tallest tsunamis in recorded history — a 100-metre-high wave that devastated a remote settlement in Greenland last month — was caused, unusually, by a massive landslide, researchers report.Â. [1] On 9 July 1958, a 7.8 M w strike-slip earthquake in southeast Alaska caused 90 million tonnes of rock and ice to drop into the deep water at the head of Lituya Bay. Since 1999, Quirin has written for Nature about science and related policy in Germany, the European Union, Eastern Europe and the former Soviet Union. All Rights Reserved. many landslides from the Kaikoira earthquake, Glacier Bay Landslide in Alaska: a satellite image and new videos, Lamplugh Glacier rock avalanche: A massive new landslide in Alaska on Tuesday, The Tyndall Glacier landslide: images from the University of Alaska Fairbanks, The Tyndall Glacier landslide in Alaska: the largest recorded non-volcanic landslide in North America, Sitka landslide in Alaska – the potential power of simple geomorphic mapping, Ferebee Glacier: another rock avalanche in Alaska, Mount La Perouse: Sunday’s rock avalanche in Alaska has been found, Breaking news: a very large landslide in Alaska on Sunday, http://m.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=11761114, The Institute of Hazard, Risk and Resilience Blog, The Bridge: Connecting Science and Policy. You will be re-directed back to this page where you will see comments updating in real-time and have the ability to recommend comments to other users. The phenomenon, which occurred in October 2015, was recorded in the Taan fjord in southeastern Alaska and appears to be within the four largest tsunamis recorded in the past century. Meanwhile, work to manage the many landslides from the Kaikoira earthquake continues. Researchers have noted another potentially imminent landslide in the Karrat Fjord, says Fritz, where a slow trickle of rocks could turn into abrupt slide. The sliding rock stopped a few miles short of the inlet this time. Much of the landslide material was deposited on the Tyndall Glacier and into the fjord. It was actually discovered in New York City from satellite photos and a large team of scientists was sent out to examine the evidence of this rare and extreme tsunami that tore across Taan Fiord. Residents of three villages in the region have been permanently evacuated to the nearby town of Uummannaq. Sedimentology and geomorphology of a large tsunamigenic landslide, Taan Fiord, Alaska Abstract. And in 2017, a landslide in Greenland produced a tsunami that roared into a small, isolated community. In October 2015, a massive landslide slid into Taan Fjord and created a tsunami in excess of 600 feet. Further to the Kaikoura earthquake: “Three quake landslide dams at high risk” article can be found at http://m.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=11761114 . Your email address will not be published. The wave washed away eleven houses, and four people are presumed dead. Both of these events thankfully occurred in sparsely populated areas, so few fatalities occurred. Flow depth here was likely 5 meters based on the height of branches stripped off trees in the background. USGS scientists investigate trees knocked over by the tsunami at the mouth of Taan Fjord, Alaska. And in 2015, a landslide-generated tsunami in the Taan Fjord in Icy Bay, Alaska, caused a 300-metre run-up of water, says Synolakis.Â, “Earlier, we didn’t really believe such extremes were possible,” he says. And in 2017, a landslide in Greenland produced a tsunami that roared into a small, isolated community. There you’ll find pictures of the most at-risk dams. Eyewitnesses likened it to an atom bomb explosion; its tsunami’s highest elevation was 524 meters (or 1,720 feet). More recently, a 2015 landslide near Alaska’s Taan Glacier produced a 633 feet (193 meter) wave in Taan Fjord that smashed into the opposite wall of the glacial valley. An earlier version of the map included an incorrect scale bar. Geophys. Our award-winning show features highlights from the week's edition of Nature, interviews with the people behind the science, and in-depth commentary and analysis from journalists around the world. This blog More recently, a 2015 landslide near Alaska’s Taan Glacier produced a 633 feet (193 meter) wave in Taan Fjord that smashed into the opposite wall of the glacial valley. Required fields are marked *. He …. The Icy Bay landslide in Alaska. Your email address will not be published. In Greenland, a 2017 landslide-caused tsunami … Last fall, when a similar-sized landslide landed directly in Alaska’s remote Taan Fiord, scientists discovered that it created a tsunami wave so large, the water swept 600 feet up the opposite side of the fiord, stripping away the trees. In cold, glacial regions, rocks and ice are held together on steep rock sides, and rising temperatures could make these slopes unstable and these events more common. They warn that such events could become more frequent as the climate warms. VIDEO: Camp Bay, height Numerical simulation of the Taan Fiord tsunami, showing the height of the moving water above the tide level. The looming tsunami of Harriman Fjord Some of the rock slid onto the snout of a tidewater glacier but most slid into the head of Taan Fjord – displacing a massive volume of water.