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

Regional tsunami hazard assessment for communities of Bristol Bay and the Pribilof Islands, Alaska

Metadata Updated: November 10, 2020

We assess potential tsunami hazards for the communities of Dillingham, Nelson Lagoon, and Platinum in Bristol Bay, and St. Paul and St. George on the Pribilof Islands. The Bristol Bay 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 Pribilof Islands communities do have the high-resolution baseline data necessary to produce high-resolution maps. The primary tsunami hazard considered for communities in this report originate from tsunamigenic earthquakes along the Alaska-Aleutian subduction zone and from underwater slope failures in the Bering Sea. Volcanic tsunamis are known to have generated waves up to 12 m in Bristol Bay about 3,500 years ago, but we do not model them in this study due to insufficient data on locations and volumes of these potential hazards. We numerically model tsunamis generated by eight different megathrust earthquakes and two landslide sources, analyze tsunami wave dynamics, and develop tsunami hazard maps. The tectonic tsunami scenarios that we examined simulate Mw 9.2 megathrust earthquakes with a slip distribution in the 5-35 km (3-22 mi) depth range along the Aleutian megathrust. The landslide tsunami scenarios include submarine mass failures on both sides of Umnak Plateau. The maximum assumed runup heights are 1.4 m (4.6 ft) for Dillingham, 3.5 m (11.5 ft) for Nelson Lagoon, and 4.9 m (16 ft) for Platinum. The maximum calculated tsunami runup in St. Paul is 16 m (52.5 ft); it is 5m (16 ft) in St. George, and 11 m (36 ft) near the St. George airport. 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/10.14509/30422.

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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 16, 2020
Metadata Created Date November 10, 2020
Metadata Updated Date November 10, 2020
Reference Date(s) January 1, 2020 (publication)
Frequency Of Update notPlanned

Additional Metadata

Resource Type Dataset
Metadata Date April 16, 2020
Metadata Created Date November 10, 2020
Metadata Updated Date November 10, 2020
Reference Date(s) January 1, 2020 (publication)
Responsible Party Alaska Division of Geological & Geophysical Surveys (Point of Contact)
Contact Email
Guid
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 -158.437750
Bbox North Lat 59.069741
Bbox South Lat 55.999827
Bbox West Long -170.299255
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 7d1de37c-820b-4268-9114-b1dff40ca9f2
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.
Metadata Language eng; USA
Metadata Type geospatial
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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