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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Alaska Division of Geological & Geophysical Surveys Combellick, R.A. James Weakland Metadata manager Hubbard, T.D. More... Tag Types Theme (36) Place (36) Tag Schemes Alaska Division of Geological & Geophysical Surveys (36) ISO 19115 Topic Category (36) 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 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 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 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 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 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 Tsunami inundation maps of Port Valdez, Alaska We evaluate potential tsunami hazards for the city of Valdez and numerically model the extent of inundation from tsunamis generated by earthquake and landslide sources. Tsunami scenarios include a repeat of the tsunami triggered by the 1964 Great Alaska Earthquake, as well as hypothetical tsunamis generated by an extended 1964 rupture, a Cascadia megathrust earthquake, and earthquakes from the Prince William Sound and Kodiak asperities of the 1964 rupture. Local underwater landslide events in Port Valdez are also considered as credible tsunamigenic scenarios. Results of numerical modeling are verified by simulating the tectonic and landslide-generated tsunamis in Port Valdez observed during the 1964 earthquake.... Tags: Active Fault, Alaska Earthquake 1964, Bathymetry, Coastal, Coastal and River, All tags... Earthquake, Earthquake Related Slope Failure, Emergency Preparedness, Engineering, Engineering Geology, Faulting, Faults, Flood, Geologic Hazards, Geology, Hazards, Inundation, Landslide, Modeling, Seismic Hazards, Tides, Tsunami, Valdez Quadrangle, geoscientificInformation, Fewer tags Quaternary Faults and Folds (QFF) Alaska is the most seismically active region of the United States. However, little information exists on the location, style of deformation, and slip rates of Quaternary faults. This interactive map displays locations and relative activity of Alaska's faults and folds. The map offers zoom and scroll options, and multiple base map layers. Click individual fault and fold traces to view basic fault parameters: name, age, slip rate, slip sense, dip direction, mapping certainty, and mapped scale. This resource is intended to provide simple and quick means of visualizing structure locations and characteristics. Users must recognize mapping certainty and data accuracy limitations when zooming in farther than the stated... Tags: Active Fault, Alaska Statewide Maps, Alaska Statewide Quadrangle, Alaska, State of, Earthquake, All tags... Faulting, Faults, Folds, Hazards, Paleoseismology, geoscientificInformation, Fewer tags Tsunami inundation maps of the villages of Chenega Bay and northern Sawmill Bay, Alaska Potential tsunami hazards for the community of Chenega Bay, located on Evans Island between Sawmill and Crab bays, were evaluated by numerically modeling the extent of inundation from tsunami waves generated by earthquakes. Tsunami scenarios include a repeat of the tsunami triggered by the 1964 Great Alaska Earthquake, as well as tsunamis generated by a hypothetically extended 1964 rupture, a hypothetical Cascadia megathrust earthquake, a hypothetical earthquake in the Kodiak asperity of the 1964 rupture, and a hypothetical Tohoku-type rupture in the Gulf of Alaska region. Results of numerical modeling are verified by simulations of the tectonic tsunami observed in Chenega Cove during the 1964 earthquake. The results... Tags: Alaska Earthquake 1964, Coastal, Coastal and River, Coastal and River Hazards, Earthquake, All tags... Earthquake Related Hazards, Emergency Preparedness, Engineering, Engineering Geology, Fault Displacement, Flood, Geologic Hazards, Hazards, Inundation, Modeling, Seismic Hazards, Southcentral Alaska, Tsunami, geoscientificInformation, Fewer tags Tsunami inundation maps for Juneau, Alaska In this report, we evaluate potential tsunami hazards for the southeastern Alaska community of Juneau and numerically model the extent of inundation from tsunami waves generated by tectonic and submarine landslide sources. We calibrate our tsunami model by numerically simulating the 2011 Tohoku tsunami at Juneau and comparing our results to instrument records. Analysis of calculated and observed water level dynamics for the 2011 event in Juneau reveals that the model underestimates the observed wave heights in the city by a factor of two, likely due to complex tsunami-tide interactions. We compensate for this numerical underestimation by doubling the coseismic slip of the hypothetical tsunami sources in our models.... Tags: Bathymetry, Berners Bay, Coastal, Douglas, Douglas Island, All tags... Eagle River, Earthquake, Engineering, Environmental, Faults, Favorite Channel, Flood, Fritz Cove, Geologic, Geology, Geotechnical, Hazards, Inundation, Juneau, Landslide, Marine, Mendenhall River, Modeling, Regional, Rockfall, Saginaw Channel, Sediment, Sedimentation, Sheep Creek, Slides, Slope, Slump, Southeast Alaska, Subduction, Subsidence, Surface, Taku Inlet, Tectonics, Topography, Tsunami, Uplift, Water, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Fairbanks 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), 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 High-resolution lidar data for infrastructure corridors, Bettles 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, 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 High-resolution lidar data for infrastructure corridors, Healy 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, Healy Quadrangle, LiDAR, LiDAR LAS File Format, Point Cloud Data, Remote Sensing, Slope Instability, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags High-resolution lidar data for infrastructure corridors, Big Delta 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, 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 High-resolution lidar data for infrastructure corridors, Tanacross 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, Tanacross Quadrangle, Trans-Alaska Pipeline, geoscientificInformation, Fewer tags 1 2 »