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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    Regional tsunami hazard assessment for the communities of Kasaan, Klawock, Metlakatla, Pelican, Point Baker, and Port Protection in Southeast Alaska

    Metadata Updated: July 5, 2023

    We assess potential tsunami hazards for six communities in Southeast Alaska: Kasaan, Klawock, Metlakatla, Pelican, Point Baker, and Port Protection. These communities have no high-resolution bathymetry or topography; therefore we conduct tsunami hazard assessments for these areas at the regional scale. The regional approach is a suitable, cost- effective approximation and replacement for high-resolution tsunami inundation maps. The primary tsunami hazard considered for these communities originates from tsunamigenic earthquakes along the Alaska-Aleutian subduction zone across the Gulf of Alaska. We numerically model tsunami waves generated by four different megathrust earthquakes and develop approximate tsunami hazard maps for the six communities. The hypothetical tsunami scenarios that we examined include variations of an extended 1964 rupture, megathrust earthquakes in the Prince William Sound and Alaska Peninsula regions, and a Cascadia megathrust earthquake. We do not include impacts of subaerial or submarine landslide tsunami sources, as that is beyond the scope of this study. The maximum runup heights from tectonically-generated tsunamis are 1.4 m (4.6 ft) in Kasaan, 4 m (13 ft) in Klawock, 1 m (3.3 ft) in Metlakatla, 5 m (16 ft) in Pelican, 1.3 m (4.3 ft) in Point Baker, and 2.6 m (8.5 ft) in Port Protection. Results presented here are intended to provide guidance to local emergency management agencies in initial tsunami inundation assessment, evacuation planning, and public education for mitigation of future tsunami hazards. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30423.

    Access & Use Information

    Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

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    Dates

    Metadata Date April 3, 2020
    Metadata Created Date July 5, 2023
    Metadata Updated Date July 5, 2023
    Reference Date(s) January 1, 2020 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from Alaska Division of Geological and Geophysical Surveys

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date April 3, 2020
    Metadata Created Date July 5, 2023
    Metadata Updated Date July 5, 2023
    Reference Date(s) January 1, 2020 (publication)
    Responsible Party Alaska Division of Geological & Geophysical Surveys (Point of Contact)
    Contact Email
    Guid e1e13576-f06b-463d-9e04-d882f8bbca3b_source
    Access Constraints Use Constraints: This dataset includes results of numerical modeling of earthquake-generated tsunami waves for a specific community. Modeling was completed using the best information and tsunami modeling software available at the time of analysis. They are numerical solutions and, while they are believed to be accurate, their ultimate accuracy during an actual tsunami will depend on the specifics of earth deformations, on-land construction, tide level, and other parameters at the time of the tsunami. Actual areas of inundation may differ from areas shown in this dataset. Landslide tsunami sources may not be included in the modeling due to unknown potential impact of such events on a given community; please refer to accompanying report for more information on tsunami sources used for this study. The limits of inundation shown should only be used as a general guideline for emergency planning and response action in the event of a major tsunamigenic earthquake. These results are not intended for any other use, including land-use regulation or actuarial purposes. Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product., Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
    Bbox East Long -131.542214
    Bbox North Lat 57.966610
    Bbox South Lat 55.108320
    Bbox West Long -136.237794
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id e1e13576-f06b-463d-9e04-d882f8bbca3b
    Harvest Source Id 8f77b6d5-f630-4995-bdf3-0aee7158a7f3
    Harvest Source Title Alaska Division of Geological and Geophysical Surveys
    Licence The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
    Lineage This lineage was generated by the FGDC CSDGM to 19139 transformation
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-136.237794, 55.10832], [-131.542214, 55.10832], [-131.542214, 57.96661], [-136.237794, 57.96661], [-136.237794, 55.10832]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2018-01-01
    Temporal Extent End 2020-01-01

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