Filters: Tags: Hazards (X) > partyWithName: Alaska Division of Geological & Geophysical Surveys (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Koehler, R.D. James Weakland Metadata manager Combellick, R.A. Hubbard, T.D. More... Tag Types Theme (62) Place (60) Tag Schemes Alaska Division of Geological & Geophysical Surveys (62) ISO 19115 Topic Category (62) View Results as: JSON ATOM CSV

Tsunami inundation maps of Fox Islands communities, including Dutch Harbor and Akutan, Alaska Potential tsunami hazards for the Fox Islands communities of Unalaska/Dutch Harbor and Akutan were evaluated by numerically modeling the extent of inundation from tsunami waves generated by hypothetical earthquake sources and taking into account historical observations. Worst-case hypothetical scenarios are defined by analyzing results of a sensitivity study of the tsunami dynamics related to various slip distributions along the Aleutian megathrust. The worst-case scenarios for Unalaska and Akutan are thought to be thrust earthquakes in the Fox Islands region with magnitudes ranging from Mw 8.8 to Mw 9.1 that have their greatest slip at 30-40 km (18-25 mi) depth. We also consider Tohoku-type ruptures and an outer-rise... Tags: Active Fault, Akutan, Coastal, Earthquake, Earthquake Related Slope Failure, All tags... Emergency Preparedness, Engineering, Engineering Geology, Fault Displacement, Faulting, Flood, Fox Islands, Geologic Hazards, Geology, Hazards, Inundation, Land Subsidence, Landslide, Modeling, Raster Image, Seismic Gap, Seismic Hazards, Slides, Slope, Slope Instability, Tides, Topography, Tsunami, Unalaska, geoscientificInformation, Fewer tags Tsunami inundation maps for the city of Sand Point, Alaska Staff from Alaska Earthquake Center, Geophysical Institute and Alaska Division of Geological & Geophysical Surveys evaluated potential tsunami hazards for the city of Sand Point, on Popof Island in the Shumagin Islands archipelago. We numerically modeled the extent of inundation from tsunami waves generated by local and distant earthquake sources. We considered the results in light of historical observations. The worst-case scenarios are defined by analyzing results of the sensitivity study of the tsunami dynamics with respect to different slip distributions along the Aleutian megathrust. For the Sand Point area, the worst-case scenarios are thought to be thrust earthquakes in the Shumagin Islands region with magnitudes... Tags: Active Fault, Alaska Earthquake 1964, Aleutian Islands, Bathymetry, Coastal, All tags... Coastal and River, Earthquake, Emergency Preparedness, Engineering, Engineering Geology, Fault Displacement, Faulting, Faults, Flood, Geologic Hazards, Geology, Hazards, Humboldt Harbor, Inundation, Land Subsidence, Modeling, Popof Island, Raster Image, Sand Point, Seismic Gap, Seismic Hazards, Seismology, Shumagin Islands, Surface, Topography, Tsunami, Water, geoscientificInformation, Fewer tags Engineering-geologic map of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska During 2009, the Alaska Division of Geological & Geophysical Surveys continued a program, begun in 2006, of reconnaissance mapping of surficial geology in the proposed natural-gas pipeline corridor through the upper Tanana River valley. The study area is a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway from the western boundaries of the Tanacross B-3 and A-3 quadrangles near Tetlin Junction eastward to the eastern boundaries of the Nabesna D-1 and C-1 quadrangles along the Canada border. Mapping during 2008-2009 in the Tanacross and Nabesna quadrangles linked with the mapping completed in the Tanacross, Big Delta and Mt. Hayes quadrangles in 2006-2008. Surficial geology was initially mapped in... Tags: Aeolian, Alaska Highway Corridor, Alaska Pipeline, Alaska, State of, Beaver Creek, All tags... Canada, Chisana River, Engineering, Engineering Geology, Eolian, Gasline, Geologic Hazards, Geologic Map, Geology, Hazards, Landslide, Landslide Deposit, Loess, Midway Lake, Nabesna, Nabesna Quadrangle, Nabesna River, Natural Gas, Northway, Northway Junction, Periglacial Slope Failure, Permafrost, Pipeline, Proposed Natural Gas Pipeline, Retransported Loess, Scottie Creek, Tanacross Quadrangle, Tanana Basin, Tanana River, Taylor Highway, Tetlin, Tetlin Junction, Tetlin National Wildlife Refuge, Thawing Permafrost, Translational Landslide, Transportation Corridor, Unconsolidated Deposits, geoscientificInformation, Fewer tags Historically active volcanoes of Alaska This data lists the historically active volcanoes of Alaska and the year of the last major eruptive event. The volcanoes listed meet at least one of the following criteria since 1700 CE: (1) documented, unquestioned eruption, or (2) a strongly suspected eruption, often an eruption documented in the historical account with very little information (current geologic knowledge must not contradict the eruption account), or (3) persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within ~10 degrees C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly... Tags: Active Volcanoes, Alaska Peninsula, Alaska Statewide Maps, Alaska, State of, Aleutian Arc, All tags... Aleutian Islands, Coastal and River, Coastal and River Hazards, Geologic Hazards, Geology, Hazards, Historic Eruption, Volcanic, Volcanic Eruption, Volcano Hazards, Volcanoes, Volcanology, geoscientificInformation, Fewer tags Quaternary faults and folds in Alaska: A digital database This dataset contains information and locations on faults and associated folds in Alaska that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). The dataset is intended to part of the USGS archive for historic and ancient earthquake sources used in current and future probabilistic seismic-hazard analyses. This dataset presents a single source that summarizes important information on paleoseismic (ancient earthquakes) parameters including, age of most recent deformation, slip rate, slip sense dip direction, and accuracy of original mapping. These data are compiled from hundreds of journal articles, maps, theses, and other documents, as referenced herein. The geospatial... Tags: Active Fault, Alaska, State of, Earthquake, Faulting, Faults, All tags... Folds, Hazards, Paleoseismology, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Valdez Quadrangle, Alaska In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications... Tags: Aerial Geology, Alaska, State of, Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, All tags... Geology, Geomorphology, Hazards, LiDAR, LiDAR LAS File Format, Point Cloud Data, Remote Sensing, Slope Instability, Trans-Alaska Pipeline, Valdez Quadrangle, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Nabesna Quadrangle, Alaska In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications... Tags: Aerial Geology, Alaska, State of, Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, All tags... Geology, Geomorphology, Hazards, LiDAR, LiDAR LAS File Format, Nabesna Quadrangle, Point Cloud Data, Remote Sensing, Slope Instability, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Talkeetna Quadrangle, Alaska In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications... Tags: Aerial Geology, Alaska, State of, Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, All tags... Geology, Geomorphology, Hazards, LiDAR, LiDAR LAS File Format, Point Cloud Data, Remote Sensing, Slope Instability, Talkeetna Quadrangle, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags Geology of Kasatochi volcano, Aleutian Islands, Alaska Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-filled central crater that is 1.2 km in diameter and extends from the highest point on the island to sea level. The oldest unit recognized is a thick series of mid-Pleistocene glaciovolcanic deposits consisting of autobrecciated lava, lahars, and volumetrically minor lava masses that we believe to have been emplaced underneath a regional ice cap. This unit is unconformably overlain by several massive Holocene lavas, above which lies a thick sequence of latest-Holocene pyroclastic deposits likely deposited during the crater-forming eruption. The... Tags: Active Volcanoes, Age Dates, Aleutian Arc, Aleutian Islands, Alluvial Deposits, All tags... Analyses, Analyses and Sampling, Basalt, Bedrock, Bedrock Geology, Caldera, Chemistry, Colluvium, Erosion, Fan, Geochemical Data, Geochemistry, Geochronology, Geologic, Geologic Hazards, Geologic Map, Geological Process, Geology, Geomorphology, Hazards, Historic Eruption, Igneous, Kasatochi, Lava Flow, Mineralogy, Petrographic, Petrography, Petrology, Pumice, Pyroclastics, Rockfall, Rocks, Sample Location, Slope Instability, Slump, Soils, Surface, Surficial, Talus, Tephra, Topography, Ultramafic, Uplift, Volcanic, Volcanic Ash, Volcanic Eruption, Volcanic Rocks, Volcaniclastics, Volcanoes, Volcanology, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Livengood Quadrangle, Alaska In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications... Tags: Aerial Geology, Alaska, State of, Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, All tags... Geology, Geomorphology, Hazards, LiDAR, LiDAR LAS File Format, Livengood Quadrangle, Point Cloud Data, Remote Sensing, Slope Instability, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Gulkana Quadrangle, Alaska In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications... Tags: Aerial Geology, Alaska, State of, Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, All tags... Geology, Geomorphology, Gulkana Quadrangle, Hazards, LiDAR, LiDAR LAS File Format, Point Cloud Data, Remote Sensing, Slope Instability, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment B: Teller to Nome Aerial photographs of the coastline from Teller to Nome were collected between August 26, 2015 - August 27, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. Orthoimages contain 4-band, 8-bit, unsigned raster data (red/green/blue/no data; file format-GeoTIFF; source-Fairbanks Fodar) with 20 cm GSD. No-data values are found... Tags: Brevig Mission, Coastal, Coastal and River, Engineering, Engineering Geology, All tags... Environmental, Geologic Hazards, Geology, Geomorphology, Hazards, Hillshade Image, Marine Geology, Methods, Nome, Orthoimagery, Raster Image, Sinuk, Surficial, Teller, geoscientificInformation, Fewer tags Photogrammetric data of the Haines Highway corridor: May 26, 2014 The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced an orthorectified aerial optical image mosaic (orthoimage) and digital surface model over an area extending from milepost (MP) 17 to approximately MP 24.5 on the Alaska State Highway 7 (Haines Highway) north of Haines along the Chilkat River in southeast Alaska. The aerial photogrammetric survey targeted large debris fans and their alpine source areas on the west side of the Takshanuk Mountains in support of cryosphere hazards mapping and monitoring efforts. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on May 26, 2014, and were processed using Structure-from-Motion (SfM) photogrammetric techniques... Tags: Aerial, Alaska, State of, Chilkat River, Debris Flow, Engineering, All tags... Engineering Geology, Environmental, Geologic Hazards, Geology, Geomorphology, Haines, Hazards, Klukwan, Methods, Orthoimagery, Raster Image, Slope, Southeast Alaska, Surface, Surficial, Takshanuk Mountains, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Talkeetna Mountains Quadrangle, Alaska In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications... Tags: Aerial Geology, Alaska, State of, Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, All tags... Geology, Geomorphology, Hazards, LiDAR, LiDAR LAS File Format, Point Cloud Data, Remote Sensing, Slope Instability, Talkeetna Mountains Quadrangle, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags High-resolution lidar data for the Whittier area, Passage Canal, and Portage Lake, Alaska In support of geologic mapping and hazards evaluation in and near Whittier, Alaska, the Division of Geological & Geophysical Surveys (DGGS) acquired, and is making publicly available, lidar (light detection and ranging) data for an area along Passage Canal, Portage Lake, and Portage Glacier Highway. The lidar data, acquired and processed by Watershed Sciences, Inc. (WSI) consist of continuous coverage encompassing an area extending from Portage Lake eastward to Logging Company Bay in Passage Canal in the Seward D-4, D-5, and D-6 1:63,360-scale quadrangles. Lidar data collected below 1,600 ft (488 m) elevation have a minimum average pulse density of 8 pulses/square meter; above 1,600 ft (488 m) data were collected... Tags: Aerial Geology, Alaska, State of, Aleutian Islands, Bare-Earth Digital Elevation Model (DEM), City of Whittier Coastal District, All tags... Digital Elevation Model, Digital Surface Model (DSM), Geologic Hazards, Geology, Geomorphology, Hazards, Highest Hit Digital Surface Model (DSM), Hillshade Image, Lidar, Lidar Intensity Image, Lidar LAS File Format, Passage Canal, Point Cloud Data, Raster Image, Raster Index Shapefile, Remote Sensing, Seward, Seward Quadrangle, Slope Instability, Vegetation Digital Surface Model (DSM), Whittier, geoscientificInformation, Fewer tags Geochemistry of some quaternary lavas from the Aleutian Arc and Mt. Wrangell This publication contains previously unpublished geochemical analyses or re-analyses of lavas, magmatic inclusions, and a few gabbroic cumulate inclusions from Alaska volcanoes (Akutan, Augustine, Buzzard Creek, Dana, Douglas, Fourpeaked, Frosty, Great Sitkin, Iliamna, Kaguyak, Kiska, Okmok, Prindle Cone, Recheshnoi, Redoubt, Spurr, Ukinrek Maars, Vsevidof, Westdahl, Wrangell) collected by the authors and others over the past 35 years. It provides substantial data sets for three volcanoes (Vsevidof, Westdahl, and Douglas) for which little or no published data exist. All analyses were made by the GeoAnalytical laboratory at Washington State University in Pullman, WA. The ICP/MS data have been reduced using the 2006... Tags: Adagdak, Adak, Akutan, Analyses, Analyses and Sampling, All tags... Analytical Lab Results, Analytical Results, Augustine, Augustine Volcano, Basalt, Bedrock, Bogoslof, Chemistry, Colorado Creek, Crater Peak, Crystals, Douglas, Faris Peak, Fourpeaked, Frosty, Frosty Peak, Geochemical Data, Geochemistry, Geochronology, Geologic, Geology, Glacier Creek, Hayes, Hazards, Ice, Iliamna, Iliamna Volcano, Jag Peak, Juneau, Kaguyak, Kansas Creek, Kasatochi, Katmai, Kiska, Maars, Mount Douglas, Mount Peulik, Mount Recheshnoi, Mount Spurr, Mount Wrangell, Mount Zanetti, Nikolski, Okmok, Okmok Caldera, Pavlof, Prindle Volcano, Redoubt, Redoubt Volcano, Rhyolite, Rocks, Sample Location, Spurr, Tanana, Tephra, The Sisters, Ukinrek, Ukinrek Maars, Uliaga, Umnak Island, Unimak, Volcanic, Volcanic Arc, Volcanic Rocks, Volcanoes, Volcanology, Vsevidof, Westdahl, Whittier, Wrangell, Yakutat, geoscientificInformation, Fewer tags Tsunami inundation map for the village of Nikolski, Alaska Potential tsunami hazard for the Umnak Island community of Nikolski is evaluated by numerically modeling the extent of inundation from tsunami waves generated by hypothetical earthquake sources. Worst-case hypothetical scenarios are defined by analyzing results of a sensitivity study of the tsunami dynamics related to various slip distributions along the Aleutian megathrust. The worst-case scenarios for Nikolski are thought to be thrust earthquakes in the Umnak Island region with their greatest slip at 10-30 km (6.2-19 mi) depth. We also consider Tohoku-type ruptures and an outer-rise rupture in the area of Umnak Island. The maximum predicted water depth on Main Street is about 15 m (49 ft), while the maximum current... Tags: Active Fault, Aleutian Islands, Coastal, Coastal and River Hazards, Earthquake, All tags... Earthquake Related Hazards, Emergency Preparedness, Engineering Geology, Fault Displacement, Faulting, Flood, Geologic Hazards, Hazards, Inundation, Land Subsidence, Modeling, Nikolski, Raster Image, Seismic Gap, Seismic Hazards, Tsunami, geoscientificInformation, Fewer tags Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment C: Nome to Elim Aerial photographs of the coastline from Nome to Elim were collected on August 23, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. This file is a single-band, 32-bit float DSM (digital surface model) which represents surface elevations of buildings, vegetation, and uncovered ground surfaces in meters with 20 cm GSD. The... Tags: Bear Creek, Bonanza River, Cape Darby, Cape Nome, Coastal, All tags... Coastal Erosion, Coastal and River, Daniels Creek, Dry Creek, Elim, Engineering, Engineering Geology, Environmental, Fish River, Flambeau River, Geologic, Geologic Hazards, Geological Process, Geomorphology, Golovin, Hazards, Hillshade Image, Iron Creek, Kachauik River, Kwiniuk River, Methods, Moses Point Fishing Village, Mudyutok River, Nome, Nome River, Orthoimagery, Port Safety, Portage Creek, Raster Image, Rock Creek, Snake River, Solomon, Solomon River, Surface, Surficial, Surficial Geology, White Mountain, Yuonglik River, geoscientificInformation, Fewer tags Tsunami inundation maps of Elfin Cove, Gustavus, and Hoonah, Alaska In this report, we evaluate potential tsunami hazards for southeastern Alaska communities of Elfin Cove, Gustavus, and Hoonah and numerically model the extent of inundation from tsunami waves generated by tectonic and landslide sources. We perform numerical modeling of historic tsunami events, such as the tsunami triggered by the 1964 Great Alaska Earthquake, and the tsunami waves generated by the recent 2011 Tohoku and 2012 Haida Gwaii earthquakes. Hypothetical tsunami scenarios include variations of the extended 1964 rupture, megathrust earthquakes in the Prince William Sound and Alaska Peninsula regions, and a Cascadia megathrust earthquake. Local underwater landslide events in Taylor Bay and Port Frederick,... Tags: Active Fault, Bartlett Cove, Coastal, Coastal and River, Earthquake, All tags... Earthquake Related Slope Failure, Emergency Preparedness, Engineering, Engineering Geology, Fault Displacement, Faulting, Flood, Geologic Hazards, Geology, Hazards, Humpback Creek, Icy Strait, Inundation, Landslide, Modeling, Port Frederick, Raster Image, Rock Avalanche, Rockfall, Seismic Hazards, Slides, Slope, Slope Instability, Southeast Alaska, Taylor Bay, Tidal Inlet, Tides, Topography, Tsunami, geoscientificInformation, Fewer tags Spatially referenced oblique aerial imagery of the Port Heiden shoreline, August 2013 In August 2013, a helicopter-based crew photographed approximately 52 miles (84 km) of shoreline near Port Heiden, Alaska, from 7 miles (11 km) northeast of Reindeer Creek, known locally as North Creek, to 10 miles (16 km) southwest of Strogonof Point. During this flight, 1,441 oblique aerial photographs were collected and were spatially referenced using a Garmin Dakota 20 handheld GPS. For a complete description of the image collection and file organization process please see the detailed metadata associated with this Raw Data File. Tags: Aerial Photography, Beach Deposits, Bristol Bay, Chignik Quadrangle, Coastal, All tags... Coastal Erosion, Coastal and River, Engineering, Engineering Geology, Geologic Hazards, Geological Process, Geology, Geomorphology, Hazards, Shoreface, geoscientificInformation, Fewer tags 1 2 3 4 »