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The purpose of this study is to evaluate tsunami hazard for the community of Seward and northern Resurrection Bay area, Alaska. This report will provide guidance to local emergency managers in tsunami hazard assessment. We used a numerical modeling method to estimate the extent of inundation by tsunami waves generated from earthquake and landslide sources. Our tsunami scenarios included a repeat of the tsunami of the 1964 Great Alaska Earthquake, as well as tsunami waves generated by two hypothetical Yakataga Gap earthquakes in northeastern Gulf of Alaska, hypothetical earthquakes in Prince William Sound and Kodiak asperities of the 1964 rupture, and local underwater landslides in Resurrection Bay. Results of numerical...
Tags: Coastal and River,
Earthquake,
Earthquake Related Slope Failure,
Emergency Preparedness,
Engineering, All tags...
Engineering Geology,
Fault Displacement,
Faulting,
Faults,
Flood,
Geologic Hazards,
Geology,
Inundation,
Kenai Peninsula,
Kenai Peninsula Borough Coastal District,
Landslide,
Modeling,
Resurrection Bay,
Seismic Hazards,
Seward,
Slides,
Slope,
Slope Instability,
Southcentral Alaska,
Surface,
Tides,
Tsunami,
geoscientificInformation, Fewer tags
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
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
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
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
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
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
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
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
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
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
The Alaska Division of Geological & Geophysical Surveys (DGGS), in partnership with the U.S. National Cooperative Geologic Mapping Program, mapped approximately 450 mi2 of the Talkeetna Mountains region of central Alaska at 1:50,000 scale over the course of six weeks in 2014. This area contains significant exposures of Late Triassic mafic volcanics and gabbro sills that have been the focus of region-wide exploration for the Strategic and Critical platinum-group elements (PGEs). The area also exposes numerous inactive and possibly active faults which project through the area of proposed hydropower development. The resulting geologic map offers an improved understanding of the geology, structural history, and mineral...
Tags: 40Ar/39Ar,
Aerial Geology,
Aerial Photography,
Alluvial,
Alluvial Deposits, All tags...
Amphibolite Facies Units,
Bedrock Geologic Map,
Bedrock Geology,
Brachiopods,
Cleary Creek,
Colluvial Deposits,
Cordilleran Ice Sheet,
Crinoids,
Esker,
Faulting,
Faults,
Floodplain,
Fluvial,
Fossils,
Geochronology,
Geologic Map,
Geologic Materials,
Geomorphology,
Glacial,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Glacial Geomorphology,
Glacial History,
Glacial Lake,
Glacial Processes,
Glacial Stratigraphy,
Glaciation,
Ice Contact Deposits,
Ice-Contact,
Iron Creek,
Lacustrine,
Lacustrine Sedimentation,
Landslide,
Landslide Deposit,
Outwash,
Outwash Fan,
Paleochannel,
Permafrost and Periglacial,
Remote Sensing,
Rock Glaciers,
Rock-Glacier Deposits,
Rockfall,
STATEMAP Project,
Sand and Gravel,
Slides,
Slope Instability,
Soil Creep,
Stephan Lake,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Talkeetna Mountains,
Talkeetna Mountains Quadrangle,
Talkeetna River,
Till,
geoscientificInformation, Fewer tags
This map shows the distribution of surficial deposits and undifferentiated bedrock in parts of the Livengood C-3 and C-4 quadrangles, Tolovana mining district.
Tags: Aeolian,
Aerial Geology,
Age Dates,
Alluvial Deposits,
Alluvium, All tags...
C14,
Colluvial Deposits,
Colluvium,
Debris Flow,
Debris Flow Deposit,
Elliot Highway,
Eolian,
Floodplain,
Geomorphology,
Goldstream Creek,
Landslide,
Livengood,
Livengood Bench,
Livengood Creek,
Livengood Dome,
Livengood Mining District,
Livengood Quadrangle,
Money Knob,
Permafrost,
Permafrost and Periglacial,
Pingos,
Placer,
Placer Gold,
STATEMAP Project,
Slides,
Slope Instability,
Solifluction,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Tailings,
Thawing Permafrost,
Thermokarst,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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),
Fairbanks Quadrangle, All tags...
Geologic Hazards,
Geology,
Geomorphology,
Hazards,
LiDAR,
LiDAR LAS File Format,
Point Cloud Data,
Remote Sensing,
Slope Instability,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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,
Bettles Quadrangle,
Digital Elevation Model,
Digital Surface Model (DSM), All tags...
Geologic Hazards,
Geology,
Geomorphology,
Hazards,
LiDAR,
LiDAR LAS File Format,
Point Cloud Data,
Remote Sensing,
Slope Instability,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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,
Healy Quadrangle,
LiDAR,
LiDAR LAS File Format,
Point Cloud Data,
Remote Sensing,
Slope Instability,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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,
Big Delta Quadrangle,
Digital Elevation Model,
Digital Surface Model (DSM), All tags...
Geologic Hazards,
Geology,
Geomorphology,
Hazards,
LiDAR,
LiDAR LAS File Format,
Point Cloud Data,
Remote Sensing,
Slope Instability,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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,
Tanacross Quadrangle,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
The purpose of this study is to evaluate potential tsunami hazards for the community of Whittier and western Passage Canal area. We numerically model the extent of inundation due to tsunami waves generated from earthquake and landslide sources. Tsunami scenarios include a repeat of the tsunami triggered by the 1964 Great Alaska Earthquake, as well as tsunami waves generated by a hypothetically extended 1964 rupture, a hypothetical Cascadia megathrust earthquake, hypothetical earthquakes in Prince William Sound, and Kodiak asperities of the 1964 rupture. Local underwater landslide and rockslide events in Passage Canal are also considered as credible tsunamigenic scenarios. Results of numerical modeling combined with...
Tags: Active Fault,
Alaska Earthquake 1964,
Bathymetry,
Coastal,
Coastal and River, All tags...
Earthquake,
Earthquake Related Slope Failure,
Emergency Preparedness,
Engineering,
Engineering Geology,
Fault Displacement,
Faulting,
Faults,
Flood,
Geologic Hazards,
Geology,
Landslide,
Modeling,
Passage Canal,
Rock Avalanche,
Rockfall,
Seismic Hazards,
Slides,
Slope,
Slope Instability,
Tides,
Tsunami,
Volcanoes,
Whittier,
geoscientificInformation, Fewer tags
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 Highway Corridor,
Alaska, State of,
Digital Elevation Model,
Digital Surface Model (DSM), All tags...
Geologic Hazards,
Geology,
Geomorphology,
Hazards,
LiDAR,
LiDAR LAS File Format,
Point Cloud Data,
Remote Sensing,
Slope Instability,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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