particularly significant in and around Anchorage. It’s under control now, though. 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. The Tatsuda's IGA building in Ketchikan, Alaska was condemned Feb. 27, 2020 after it was struck early Thursday morning by a rockslide. In August 2015 there were more than 60 landslides in and around Sitka after heavy rains inundated the region. Alaska Division of Geological Geophysical Surveys Landslides cause deaths, injuries, and homelessness every year, and damage or destroy buildings, roads, and other infrastructure. 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). 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. “Yeah, we’ve had quite a few landslides here in town, lot of debris in the roads. Flooding in Haines was significant on Wednesday. This is a developing story. Landslides in Alaska. 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. 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. Juneau resident Rhett Morgan said about 2-3 inches of water flowed into his garage. 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. City and state crews were busy clearing roadways of mud and debris on Wednesday morning. Broader impacts of the tsunami include 30-foot waves hitting Whittier, Alaska. 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. damage to infrastructure, including roadways and homes. There is at least one person not accounted for at this time. 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). In 2004, an area of the Alaska Highway near Northway was rerouted because of a slope failure. federal government agencies, and the general public. According to the experts, the catastrophe can come within the next 12 months or in the coming 20 years. This region has a long history of tsunami waves generated by … Planning is underway to reroute the Dalton Highway in the southern Brooks Range due to slow-moving permafrost-related landslides—known as frozen debris Frozen debris lobe FDL-A approaching the Dalton Highway in the southern Brooks Range. And heavy rainfall brought Falls Creek near Petersburg to flood stage on Tuesday — the highest level ever recorded on a stream gauge there. The Juneau airport saw nearly five inches of rain in a 24-hour period — a new record for daily rainfall. “In Taan Fiord (Icy Bay, Alaska), a … The main portion of … The downpour inundated low-lying areas around nearby Ward Lake, and 50 mph gusts knocked out power north of town early Tuesday morning. The drainage water systems have been flooding over the roads. These landslides resulted in three fatalities and substantial Landslides are often complex, involving multiple types of movement and material, and may begin as one type of These include the numerous ground failures that resulted from the 1964 Great Alaska Earthquake, which were (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 … 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. 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. 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. Sedimentology and geomorphology of a large tsunamigenic landslide, Taan Fiord, Alaska Abstract. 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. Landslide on the west side of the Dalton Highway, south bank of the Yukon River. Across Icy Strait in Hoonah, police Sgt. 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; By Associated Press August 25, 2015. along the Haines Highway in an area of frequent rock fall. Changing climate in Alaska increases the risk of landslides Landslide maps help raise awareness and promote … In general, landslides are classified based on the material type being transported and the mechanics of how the material moves. © Alaska Public Media 2020. 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. High winds, flooding and landslides caused moderate to severe damage in communities across Southeast Alaska Wednesday, as an atmospheric river … Landslides in Alaska. 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 With reporting from Erin McKinstry, Jeremy Hsieh, Rashah McChesney, Henry Leasia and Joe Viechnicki. Alaska and landslide tsunamis Alaska is no stranger to landslide-induced tsunamis. “We’re seeing real heavy rainfall amounts all across the panhandle,” said Jonathan Suk with the National Weather Service in Juneau. At the landslide's current elevation, its mass would trigger a tsunami with waves hundreds of feet tall in Barry Arm. Alaska Landslide: Officials Identify Third Body. 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. Joshua Huskey said there hasn’t been any catastrophic damage. Landslide potential depends on a number of factors, including topography (slope), 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. In Gustavus, Fire Chief Travis Miller says the Salmon River hit its highest level on Wednesday since monitoring began in 2014. 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. 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. mass movement and evolve into another as material moves downslope. In Alaska, degrading permafrost, steep slopes, heavy rain, retreating glaciers, ground-shaking from earthquakes, and isostatic lobes—that are threatening the highway. All rights reserved. On July 25, Stark noted a possible landslide event in southeastern Alaska. Petersburg saw over eight and half inches of rain from the storm as of Wednesday. 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.”. 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. The ensuing splash reached more than 1,700 feet (530 meters) in height. Using imagery from the Landsat 8 satellite, scientists have confirmed that a large landslide occurred in southeastern Alaska on February 16, 2014. 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. 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. Transported materials include rock, soil (fine-grained material), Nearly a foot of rain fell in Pelican over the last 48 hours. evaluated unstable slopes in a historically problematic area of slope failure along the Richardson Highway south of Glennallen; and investigated alpine-sourced debris flows In August 2015 there were more than 60 landslides in and around Sitka after heavy rains inundated the region. For a closer view, Alpine Air Alaska has posted aerial photographs and a video. Take a look at these impressive numbers. … No life threatening damage of any sorts.”. 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. These landslides resulted in three fatalities and … 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. 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. 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. The researchers said: “Landslides have set off giant waves elsewhere in Alaska and Greenland during the past decade. NASA Earth Observatory images by Joshua Stevens, using Landsat data from the U.S. Geological Survey. Water and debris washed out and blocked many roadways. “No major hills — landslides or slides  of anything. A flood watch remains in effect through Thursday morning for Haines and Skagway. Juneau’s mayor Beth Weldon showed up to help, too. 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. There are many examples of landslides that have significantly impacted Alaska. KETCHIKAN, Alaska (AP) — A landslide in a city near the southern tip of the Alaska Panhandle demolished the back side of a grocery store. 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. Southeast Alaska is taking a beating from a series of storms bringing high winds and heavy rain. School was canceled for the day and city officials urged residents to stay indoors and not travel. “I know that some locations have set all-time records for the days, for 24 hours. 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. 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. (Rashah McChesney/KTOO) High winds, flooding and landslides prompted average to extreme injury in communities across Southeast […] For a closer view, Alpine Air Alaska has posted aerial photographs and a video. 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. Authors: Stevens, D.S.P., Wolken, G.J., Hubbard, T.D., and Hendricks, K.A. Landslides in Alaska. Many regions in Alaska are especially prone to landslides. These include the numerous ground failures that resulted from the 1964 Great Alaska Earthquake, which were particularly significant in and around Anchorage. 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