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. Photo from U.S. Coast and Geodetic Survey archives. There is at least one person not accounted for at this time. Deadly August 2015 landslide near Sitka, Alaska. 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. In general, landslides are classified based on the material type being transported and the mechanics of how the material moves. City and state crews were busy clearing roadways of mud and debris on Wednesday morning. 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. 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. For a closer view, Alpine Air Alaska has posted aerial photographs and a video. NASA Earth Observatory images by Joshua Stevens, using Landsat data from the U.S. Geological Survey. damage to infrastructure, including roadways and homes. 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. Ketchikan was soaked with about 9.5 inches of rain over the Thanksgiving weekend, according to federal meteorologists. 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. School was canceled for the day and city officials urged residents to stay indoors and not travel. The ensuing splash reached more than 1,700 feet (530 meters) in height. and debris (coarse-grained materials) that move downslope by fall, slide, or flow. Using imagery from the Landsat 8 satellite, scientists have confirmed that a large landslide occurred in southeastern Alaska on February 16, 2014. (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 … 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. Across Icy Strait in Hoonah, police Sgt. 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. lobes—that are threatening the highway. “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. Transported materials include rock, soil (fine-grained material), Broader impacts of the tsunami include 30-foot waves hitting Whittier, Alaska. “This is like the first flood that I’ve been a part of,” Morgan said. Landslides are common in Southeast Alaska and the U.S. Forest service has documented thousands of these features in Tongass National Forest. All rights reserved. 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. Frozen debris lobe FDL-A approaching the Dalton Highway in the southern Brooks Range. 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. 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; Landslides in Alaska. Flooding in Haines was significant on Wednesday. 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. It’s under control now, though. Planning is underway to reroute the Dalton Highway in the southern Brooks Range due to slow-moving permafrost-related landslides—known as frozen debris evaluated unstable slopes in a historically problematic area of slope failure along the Richardson Highway south of Glennallen; and investigated alpine-sourced debris flows 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 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. 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

landslides in alaska

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