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His initial analysis of the seismic data suggested the slide occurred in eastern Alaska and had a mass of about 20 million metric tonnes (22 million tons). A December 2018 landslide on the Seward Highway, south of Anchorage, resulted in road closure while material was removed and the area was inspected to ensure safe travel. Alaska Landslide: Officials Identify Third Body. We’re still sorting through that trying to come up with all those numbers but we are in the process of doing that and it’s looking like a very wet and unfortunately eventful storm system coming through as we also are seeing a lot of landslides, mudslides and flooding across the area.”, RELATED: As record rains drown Southeast, destruction appears worst in Haines. By Associated Press August 25, 2015. Juneau, Alaska (KINY) - Alaska State Troopers and other agencies are on the ground in Haines. and debris (coarse-grained materials) that move downslope by fall, slide, or flow. rebound are important mechanisms that can trigger devastating landslides. “Yeah, we’ve had quite a few landslides here in town, lot of debris in the roads. At the landslide's current elevation, its mass would trigger a tsunami with waves hundreds of feet tall in Barry Arm. © Alaska Public Media 2020. 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. Developing landslide inventory/susceptibility maps and modeling potential debris flow runout for the Sitka and Homer areas; Monitoring the movement of frozen debris lobes encroaching on the Dalton Highway in the southern Brooks Range in collaboration with the University of Alaska Fairbanks; Assessing the landslide and tsunami hazards in the upper Barry Arm with multiple state, federal, private and university entities. As much as she has her eye on rain and wind, Seibert has her eye on this measurement, which is akin to soil moisture, but relevant to landslides. The Tatsuda's IGA building in Ketchikan, Alaska was condemned Feb. 27, 2020 after it was struck early Thursday morning by a rockslide. These landslides resulted in three fatalities and substantial The massive landslide in Lituya Bay, Alaska on July 9, 1958 caused a wave 1,700’ tall to wash away vegetation along the shores of the bay. lobes—that are threatening the highway. Changing climate in Alaska increases the risk of landslides Landslide maps help raise awareness and promote … … It’s just wet and crazy,” he said with a laugh. Landslide on the west side of the Dalton Highway, south bank of the Yukon River. With reporting from Erin McKinstry, Jeremy Hsieh, Rashah McChesney, Henry Leasia and Joe Viechnicki. This is a developing story. Landslides in Alaska. Landslides and rising water across Southeast as rain breaks records and keeps falling, Jennifer Pemberton, Alaska's Energy Desk - Juneau, Rhett Morgan said about 2-3 inches of water flowed into his garage, Evacuations and a search for missing after rains prompt large landslide in Haines, Here’s ASD’s latest plan to bring Anchorage students back to classrooms, Unable to reach hospital because of weather, Pilot Station man dies of COVID-19. It’s under control now, though. And heavy rainfall brought Falls Creek near Petersburg to flood stage on Tuesday — the highest level ever recorded on a stream gauge there. “It is well established that Alaska sees large landslides in the spring, and that their increasing size and frequency is driven by global heating,” Petley wrote. Only July 9, 1958, an earthquake triggered a landslide in Lituya Bay, releasing an estimated 40 million cubic yards (30 million cubic meters) of material. NASA Earth Observatory images by Joshua Stevens, using Landsat data from the U.S. Geological Survey. The ensuing splash reached more than 1,700 feet (530 meters) in height. A landslide is the down-slope movement of earth material, under the influence of gravity, due to ground failure. Joshua Huskey said there hasn’t been any catastrophic damage. Landslides and rising water across Southeast, rain breaks records and keeps falling – Alaska Public Media News The floor exterior of the AWARE workplaces on Glacier Avenue in Juneau is roofed in particles after a mudslide on December 2. Alaska State Department of Natural Resources had also warned about the situation in May this year as they issued a press release about a possible landslide-triggered tsunami because of the melting glacier. (Rashah McChesney/KTOO) High winds, flooding and landslides prompted average to extreme injury in communities across Southeast […] Landslides are often complex, involving multiple types of movement and material, and may begin as one type of No … Southeast Alaska is taking a beating from a series of storms bringing high winds and heavy rain. The National Weather Service models show the storm front finally starting to move out of the region Wednesday evening, but heavy rain will continue throughout the day until then. #akwx @KTOOpubmedia @KRBDRadio @ravenradio @KHNS_FM @KFSK1 pic.twitter.com/sKvrlGwjfr. In general, landslides are classified based on the material type being transported and the mechanics of how the material moves. “No major hills — landslides or slides  of anything. (Note: The USGS monitoring site on Harbor Mountain should not be confused with the Alaska DNR weather station, also on Harbor Mountain.) Juneau resident Rhett Morgan said about 2-3 inches of water flowed into his garage. In a normal year, cruise ships carrying up to 4,000 passengers transit Glacier Bay’s steep-walled fjords hundreds of … One such research conducted by scientists in Alaska, United States, has warned of an impending mega tsunami in the state which can be triggered by a landslide. along the Haines Highway in an area of frequent rock fall. Sedimentology and geomorphology of a large tsunamigenic landslide, Taan Fiord, Alaska Abstract. Photo from U.S. Coast and Geodetic Survey archives. Potential Landslides and Tsunami Hazards in Glacier Bay, Alaska Release Date: September 30, 2020 USGS landslide scientists recently completed an investigation that provides an initial assessment of areas where landslides could enter the water of Glacier Bay and generate tsunamis. Deadly August 2015 landslide near Sitka, Alaska. There are a number of flood watches and warnings active across the region and even a winter storm warning still in effect for White Pass, which is the only part of the panhandle receiving its precipitation in the form of snow. Because landslides can potentially impact people and infrastructure in Alaska, DGGS conducts studies to evaluate unstable slopes and provide valuable information to policy makers, state and Across Icy Strait in Hoonah, police Sgt. For a closer view, Alpine Air Alaska has posted aerial photographs and a video. Petersburg saw over eight and half inches of rain from the storm as of Wednesday. On May 14, an Alaska Department of Natural Resources press release and a public letter from 14 scientists warned locals of a possible landslide-generated tsunami. The drainage water systems have been flooding over the roads. Transported materials include rock, soil (fine-grained material), Flooding in Haines was significant on Wednesday. He said his neighbors have been placing the sandbags and diverting water since Tuesday night. School was canceled for the day and city officials urged residents to stay indoors and not travel. Tsunamis caused by submarine (below water) and subaerial (above the water) landslides are a serious hazard in bays and fjords of coastal Alaska, particularly in Southeast and South-central Alaska. “We’re seeing real heavy rainfall amounts all across the panhandle,” said Jonathan Suk with the National Weather Service in Juneau. For a closer view, Alpine Air Alaska has posted aerial photographs and a video. In Gustavus, Fire Chief Travis Miller says the Salmon River hit its highest level on Wednesday since monitoring began in 2014. geology, lithology (rock or sediment type), vegetation, and water. Using imagery from the Landsat 8 satellite, scientists have confirmed that a large landslide occurred in southeastern Alaska on February 16, 2014. “No houses floating away, nothing like that,” said Miller. DGGS is currently involved in a number of landslide assessment and monitoring projects in Alaska, including: Alaska Division of Geological & Geophysical Surveys, Alaska Department of Transportation & Public Facilities, AKDOT&PF's Geotechnical Asset Management Program, Division of Geological & Geophysical Surveys. In August 2015 there were more than 60 landslides in and around Sitka after heavy rains inundated the region. “I didn’t really know what to do at first so I went to Home Depot, and they were closed last night, and banged on the door until they let me get some sandbags.”, This storm is one for the record books. Thorne Bay resident Sam Sawyer says he was heading into Klawock for a doctor’s appointment when he came across a landslide blocking state highway 929 near Black Bear Creek Monday, October 26, 2020. Landslide potential depends on a number of factors, including topography (slope), “It is well established that Alaska sees large landslides in the spring, and that their increasing size and frequency is driven by global heating,” Petley wrote. Juneau’s mayor Beth Weldon showed up to help, too. A flood watch remains in effect through Thursday morning for Haines and Skagway. NASA Earth Observatory images by Joshua Stevens, using Landsat data from the U.S. Geological Survey. Landslides are common in Southeast Alaska and the U.S. Forest service has documented thousands of these features in Tongass National Forest. Water and debris washed out and blocked many roadways. Many regions in Alaska are especially prone to landslides. In 2004, an area of the Alaska Highway near Northway was rerouted because of a slope failure. Alaska Division of Geological Geophysical Surveys Landslides cause deaths, injuries, and homelessness every year, and damage or destroy buildings, roads, and other infrastructure. federal government agencies, and the general public. The respite for the region will not come as clear skies, but precipitation for Thursday is expected to be “light” and the winds will die down “considerably.”. These include the numerous ground failures that resulted from the 1964 Great Alaska Earthquake, which were particularly significant in and around Anchorage. Many coastal areas in Southcentral and Southeast Alaska are susceptible to tsunamis generated by landslides, and history records several such events, including the 1958 Lituya Bay and the 2015 Taan Fjord tsunamis. High winds, flooding and landslides caused moderate to severe damage in communities across Southeast Alaska Wednesday, as an atmospheric river stalled over the region and brought record-breaking rain. … No life threatening damage of any sorts.”. On July 25, Stark noted a possible landslide event in southeastern Alaska. Planning is underway to reroute the Dalton Highway in the southern Brooks Range due to slow-moving permafrost-related landslides—known as frozen debris Scientists have found such an unstable slope near Barry Glacier in Alaska, the United States that stands the chance of failing and causing a mega tsunami bringing damage and destruction on a massive scale. On May 14, an Alaska Department of Natural Resources press release and a public letter from 14 scientists warned locals of a possible landslide-generated tsunami. All rights reserved. Ketchikan was soaked with about 9.5 inches of rain over the Thanksgiving weekend, according to federal meteorologists. Landslides in Alaska. particularly significant in and around Anchorage. There are many examples of landslides that have significantly impacted Alaska. An open letter signed by 14 scientists with expertise in landslides, tsunamis and climate change warns of an unstable mountain slope above the leading edge of the retreating Barry Glacier in Alaska. In Alaska, degrading permafrost, steep slopes, heavy rain, retreating glaciers, ground-shaking from earthquakes, and isostatic The researchers said: “Landslides have set off giant waves elsewhere in Alaska and Greenland during the past decade. There is at least one person not accounted for at this time. evaluated unstable slopes in a historically problematic area of slope failure along the Richardson Highway south of Glennallen; and investigated alpine-sourced debris flows According to Troopers there has been a landslide in Haines which has damaged at least one house and has possibly cut off access to the airport. As of about noon Wednesday, he says water levels are coming up to some homes’ baseboards and door seals, and the river carved away a small embankment near city hall, but he hasn’t had to close roads. Heavy rain, high winds and saturated soil bring the potential for landslides, and that’s a particular concern for city officials in the Prince of Wales Island community of Craig. roads impacted by slope instability and has web sites with information along the state's road system (Unstable Slopes in Alaska; AKDOT&PF's Geotechnical Asset Management Program). mass movement and evolve into another as material moves downslope. A glacier that had held an Alaskan slope in place for centuries is melting, releasing the soil beneath in what can be described as a slow-motion landslide, researchers say. damage to infrastructure, including roadways and homes. Nearly a foot of rain fell in Pelican over the last 48 hours. High winds, flooding and landslides caused moderate to severe damage in communities across Southeast Alaska Wednesday, as an atmospheric river … Recent DGGS projects have assessed geotechnical characteristics relating to a landslide that occurred in September 2012 near the Dalton Highway bridge over the Yukon River; “In Taan Fiord (Icy Bay, Alaska), a … The red arrow shows the location of the landslide, and the yellow arrow shows the location of the high point of the wave sweeping over the headland. Take a look at these impressive numbers. Damage from the 1958 Lituya Bay megatsunami can be seen in this oblique aerial photograph of Lituya Bay, Alaska as the lighter areas at the shore where trees have been stripped away. City and state crews were busy clearing roadways of mud and debris on Wednesday morning. There are many examples of landslides that have significantly impacted Alaska. These include the numerous ground failures that resulted from the 1964 Great Alaska Earthquake, which were Frozen debris lobe FDL-A approaching the Dalton Highway in the southern Brooks Range. According to the experts, the catastrophe can come within the next 12 months or in the coming 20 years. “I know that some locations have set all-time records for the days, for 24 hours. The Alaska Department of Transportation & Public Facilities (DOT&PF) frequently deals with This region has a long history of tsunami waves generated by … The main portion of … Farther south safety concerns at Alaska’s Glacier Bay National Park led to a 2017 report in which geologists described 24 landslides they believe were at least in part climate-related. 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. In August 2015 there were more than 60 landslides in and around Sitka after heavy rains inundated the region. Alaska and landslide tsunamis Alaska is no stranger to landslide-induced tsunamis. These landslides resulted in three fatalities and … Landslides in Alaska. Its Port St. Nicholas Road has seen at least four slides since late October — including one on Saturday, Nov. 28 that was cleared the following day. KETCHIKAN, Alaska (AP) — A landslide in a city near the southern tip of the Alaska Panhandle demolished the back side of a grocery store. The Juneau airport saw nearly five inches of rain in a 24-hour period — a new record for daily rainfall. (Photo courtesy of the Alaska State Library historical collection) The City and Borough of Juneau is warning residents to be prepared in case heavy rains and snowmelt cause landslides … Broader impacts of the tsunami include 30-foot waves hitting Whittier, Alaska. The downpour inundated low-lying areas around nearby Ward Lake, and 50 mph gusts knocked out power north of town early Tuesday morning. Authors: Stevens, D.S.P., Wolken, G.J., Hubbard, T.D., and Hendricks, K.A. “This is like the first flood that I’ve been a part of,” Morgan said. Many creeks and lakes were at risk of flooding on Wednesday with one to two inches of rain in the forecast through the end of the day.

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