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Subaerial landslides at the head of Barry Arm Fjord in southern Alaska could generate tsunamis (if they rapidly failed into the Fjord) and are therefore a potential threat to people, marine interests, and infrastructure throughout the Prince William Sound region. Knowledge of ongoing landslide movement is essential to understanding the threat posed by the landslides. Because of the landslides' remote location, field-based ground monitoring is challenging. Alternatively, periodic acquisition and interferometric processing of satellite-based synthetic aperture radar data provide an accurate means to remotely monitor landslide movement. Interferometric synthetic aperture radar (InSAR) uses two Synthetic Aperture...
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Throughout a 20-year biosurveillance period, viral hemorrhagic septicemia virus was isolated in low titers from only 6 / 7,355 opportunistically sampled adult Pacific herring, reflecting the typical endemic phase of the disease when the virus persists covertly. However, more focused surveillance efforts identified the presence of disease hot spots occurring among juvenile life history stages from certain nearshore habitats. These outbreaks sometimes recurred annually in the same temporal and spatial patterns and were characterized by infection prevalence as high as 96%. Longitudinal sampling indicated that some epizootics were relatively transient, represented by positive samples on a single sampling date, and others...
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These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has one comma separated values (.csv) table with estimates of eelgrass (Zostera marina) percent cover. Eelgrass cover was estimated from sonar and video drop cameras deployed from boats following prescribed survey transects.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F7K072DR This dataset includes zooplankton biomass from Prince William Sound, Icy Bay and Yakutat Bay, Alaska. Zooplankton were sampled with a ring net (0.6 m diameter with 211 µ mesh) on a 50 m vertical haul or to within 5 m of the bottom in shallow water. Zooplankton samples were identified to species and life stage when possible.
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This dataset consists of sample descriptions and radiocarbon age data from coastal environments on Montague Island, Alaska, analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F7513WCB. These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has five comma separated values (.csv) file exported from a Microsoft Access relational database. The data consist of percent cover and point contact data from algae and invertebrates at intertidal rocky substrate sampling sites. Tables include: 1) intertidal cover, 2) intertidal percent cover, 3) intertidal top layer percent cover, 4) intertidal substrate percent cover, and 5) taxonomic classification table. Version History: First release: September 2022 Revised: October 2023 (ver. 2.0) Revised: October 2024...
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Summary This data release contains postprocessed model output from a simulation of hypothetical rapid motion of landslides, subsequent wave generation, and wave propagation. A simulated displacement wave was generated by rapid motion of unstable material into Barry Arm fjord. We consider the wave propagation in Harriman Fjord and Barry Arm, western Prince William Sound (area of interest and place names depicted in Figure 1). We consider only the largest wave-generating scenario presented by Barnhart and others (2021a, 2021b). As in Barnhart and others (2021c), we used a simulation setup similar to Barnhart and others (2021a, 2021b), but our results differ because we used different topography and bathymetry datasets....
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Multiple subaerial landslides adjacent to Prince William Sound, Alaska (for example, Dai and others, 2020; Higman and others, 2023; Schaefer and others, 2024) pose a threat to the public because of their potential to generate ocean waves (Dai and others, 2020; Barnhart and others, 2021; Barnhart and others, 2022) that could impact towns and marine activities. One bedrock landslide on the west side of Barry Arm fjord drew international attention in 2020 because of its large size (~500 M m3) and tsunamigenic potential (Dai and others, 2020). As part of the U.S. Geological Survey response to the detection of the potentially tsunamigenic landslide at Barry Arm, as well as a broader effort to evaluate bedrock landslide...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Barry Arm, Barry Arm, Blackstone Bay, Cochrane Bay, All tags...
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These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and contain diet data from Black-legged Kittiwakes (BLKI), Rhinoceros Auklets (RHAU), and Tufted puffins (TUPU) located on Middleton Island in the Gulf of Alaska. This data release consists of seabird diet sample data and prey identification and morphometrics. Version History: First release: March 2023 Revised: October 2024 (ver. 2.0)
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z One table with data used to validate aerial fish surveys in Prince William Sound, Alaska. Data includes: date, location, latitude, longitude, aerial ID, validation ID, total length and validation method. Various catch methods were used to obtain fish samples for aerial validations, including: cast net, go pro, hydroacoustics, jig, dip net, gill net, purse seine, photo and visual identification. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September 2024 (ver. 4.0)
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F7K072DR This dataset contains catch data from trawls at the sampling stations. We deployed a modified herring trawl in coastal waters within glacier fjords of Alaska. Sampling stations in each fjord were chosen randomly from a 2.5 x 2.5 km grid overlaid on navigable waters in the fjord. The number of stations in each fjord was chosen to achieve a sampling frequency of about 1 sample per 15 km^2, and was based on available resources and logistical constraints (weather, navigational hazards and vessel time).
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These are genetic data collected from replicated samples of 21 Enteroctopus (E. dofleini or a cryptic lineage) in Prince William Sound Alaska to evaluate tissue type, DNA extraction method, and time until analyses are completed on data reliability. Data collected from all samples include two microsatellites identified as possible lineage indicators, and nine microsatellite loci previously identified as polymorphic in both lineages. DNA sequence data from 528 bp of the octopine dehydrogenase (OCDE) gene were also collected.
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This data release contains extent shapefiles for 16 hypothetical slope failure scenarios for a landslide complex at Barry Arm, western Prince William Sound, Alaska. The landslide is likely active due to debuttressing from the retreat of Barry Glacier (Dai and others, 2020) and sits above Barry Arm, posing a tsunami risk in the event of slope failure (Barnhart and others, 2021). Since discovery of the landslide by a citizen scientist in 2020, kinematic structural elements have been mapped (Coe and others, 2020) and ground-based and satellite synthetic aperture radar (SAR) have been used to track ongoing movement at a high spatial resolution (Schaefer and others, 2020; Schaefer and others, 2022). These efforts have...
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This data release contains model output from simulations presented in the associated Open-File Report (Barnhart and others, 2021). In this report, we present model results from four simulations (scenarios C-290, NC-290, C-689, NC-689, Table 1) of hypothetical rapid movement of landslides into adjacent fjord water at Barry Arm, Alaska using the D-Claw model (George and Iverson, 2014; Iverson and George, 2014). The basis for the four scenarios is described in Barnhart and others (2021). Table 1. Summary of four considered scenarios including key simulation input parameter values. Simulation input parameters Scenario name and description NC-290 C-290 NC-689 C-689 Symbol Units Description Smaller,...
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This data release includes 2 child items with tracking data for Kittlitz's Murrelets, a rare seabird species that nests solitarily on the ground in barren, often alpine areas near the North Pacific and Bering Sea. Child Item 1: "Argos Satellite Tracking Data for Kittlitz's Murrelets (Brachyramphus brevirostris) - Processed Data" Quality-controlled data collected from Argos satellite transmitters. Child Item 2: "Argos Satellite Tracking Data for Kittlitz's Murrelets (Brachyramphus brevirostris) - Raw Data" All raw data collected from Argos satellite transmitters, provided for completeness of the archive. The "Argos Processed Data" (Child Item 1) are better suited for most analytical purposes.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z Multiple tables (one for each sample station and frequency) with echointegration data from forage fish survey transects in Prince William Sound, Alaska. Each file contains analysis exports from EchoView Software Pty Ltd. ver. 7.1.29.30212. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September 2024 (ver. 4.0)
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F7513WCB. These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has two comma separated values (.csv) file exported from a Microsoft Access relational database. The data consist of 1) counts of Nucella spp., Lottia spp., Lirabuccinum dirum, and Katharina tunicata and 2) a taxonomic classification table. Version History: First release: September 2022 Revised: October 2023 (ver. 2.0) Revised: October 2024 (ver. 3.0)
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This dataset consists of fossil diatom counts from sediment cores collected in coastal environments on Montague Island, Alaska, and analyzed at Virginia Tech University.


map background search result map search result map Enteroctopus Sampling Effects on Genetic Data, Prince William Sound, Alaska, 2012-2015 High-resolution multibeam bathymetry data collected southwest of Montague Island, Alaska during field activity 2014-622-FA High-resolution multibeam bathymetry data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA Interferometric synthetic aperture radar data from 2020 for landslides at Barry Arm Fjord, Alaska Select model results from simulations of hypothetical rapid failures of landslides into Barry Arm, Prince William Sound, Alaska Survey of viral hemorrhagic septicemia virus in Pacific herring throughout the North Pacific Ocean Rock mass quality and structural geology observations in northwest Prince William Sound, Alaska from the summer of 2021 Simulated inundation extent and depth in Harriman Fjord and Barry Arm, western Prince William Sound, Alaska, resulting from the hypothetical rapid motion of landslides into Barry Arm Fjord, Prince William Sound, Alaska Seabird Diet Data Collected on Middleton Island, Gulf of Alaska Hypothetical landslide failure extents for hazard assessment, Barry Arm, western Prince William Sound, Alaska Radiocarbon Data from Coastal Environments on Montague Island, Alaska Diatom Data from Coastal Environments on Montague Island, Alaska Eelgrass (Zostera marina) Percent Cover Data from Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound, Alaska Child Item 2: Rocky Intertidal Nucella, Lirabuccinum, Katharina, and Lottia Counts from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Child Item 3: Rocky Intertidal Invertebrate and Algae Cover from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Child Item 04: Forage Fish Aerial Validation Data from Prince William Sound, Alaska Child Item 08: Hydroacoustic Survey Data from Prince William Sound, Alaska Child Item 5: Modified Herring Trawl Fish Catch Data in Gulf of Alaska Fjords, 2004-2011 Child Item 6: Zooplankton Biomass Data from Gulf of Alaska Fjords, 2010-2011 Tracking Data for Kittlitz's Murrelets (Brachyramphus brevirostris) Diatom Data from Coastal Environments on Montague Island, Alaska Hypothetical landslide failure extents for hazard assessment, Barry Arm, western Prince William Sound, Alaska Interferometric synthetic aperture radar data from 2020 for landslides at Barry Arm Fjord, Alaska High-resolution multibeam bathymetry data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA Simulated inundation extent and depth in Harriman Fjord and Barry Arm, western Prince William Sound, Alaska, resulting from the hypothetical rapid motion of landslides into Barry Arm Fjord, Prince William Sound, Alaska High-resolution multibeam bathymetry data collected southwest of Montague Island, Alaska during field activity 2014-622-FA Radiocarbon Data from Coastal Environments on Montague Island, Alaska Rock mass quality and structural geology observations in northwest Prince William Sound, Alaska from the summer of 2021 Child Item 08: Hydroacoustic Survey Data from Prince William Sound, Alaska Child Item 04: Forage Fish Aerial Validation Data from Prince William Sound, Alaska Enteroctopus Sampling Effects on Genetic Data, Prince William Sound, Alaska, 2012-2015 Seabird Diet Data Collected on Middleton Island, Gulf of Alaska Select model results from simulations of hypothetical rapid failures of landslides into Barry Arm, Prince William Sound, Alaska Eelgrass (Zostera marina) Percent Cover Data from Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound, Alaska Child Item 2: Rocky Intertidal Nucella, Lirabuccinum, Katharina, and Lottia Counts from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Child Item 3: Rocky Intertidal Invertebrate and Algae Cover from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Child Item 5: Modified Herring Trawl Fish Catch Data in Gulf of Alaska Fjords, 2004-2011 Child Item 6: Zooplankton Biomass Data from Gulf of Alaska Fjords, 2010-2011 Survey of viral hemorrhagic septicemia virus in Pacific herring throughout the North Pacific Ocean Tracking Data for Kittlitz's Murrelets (Brachyramphus brevirostris)