{"action":"create","ckan_id":null,"date_created":"Sat, 28 Feb 2026 20:37:18 GMT","date_finished":null,"harvest_job_id":"6ffa3b4c-5787-478c-b13f-c34182db1fa4","harvest_source_id":"31f41541-38a0-400b-b240-10ebcb0acd9a","id":"3f7a3ff5-af0c-4171-ab87-eab173d7ce60","identifier":"https://dggs.alaska.gov/webpubs/metadata/DDS21.xml","parent_identifier":null,"source_hash":"ee79903ebc24276d6296f8d87df18b7a1bc9dccc5a4218a9f94d6c1e69038dda","source_raw":"Nicolsky, D.J.Suleimani, E.N.Seitz, S.S.Montayne, SimoneSalisbury, J.B.2024Catalog of source data for tsunami inundation modeling in AlaskadataDigital Data SeriesDDS 21Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveyshttps://doi.org/10.14509/30953Catalog of source data for tsunami inundation modeling in Alaska, Digital Data Series 21,\r\nprovides tsunami source models developed for tsunami hazard assessments of at-risk coastal communities throughout Alaska. Tsunami sources include great (M8 or more) earthquakes in Alaska and around the Pacific Ocean Basin, as well as submarine and subaerial landslides, and include slip distributions and seafloor deformations and landslide volumes, respectively, as georeferenced TIFF files. Alaska Division of Geological & Geophysical Surveys and the University of Alaska, Alaska Earthquake Center staff initiated the tsunami hazard assessment program in the late 1990s as a component of the NOAA/NWS-funded National Tsunami Hazard Mitigation Program (NTHMP). This resource and supporting data repository provide a comprehensive, public-facing, searchable catalog of all tsunami sources used in decades of Alaska tsunami hazard studies to promote transparency, facilitate scientific reproducibility, and satisfy NTHMP archival requirements. Seismic and non-seismic digital tsunami sources from future hazard studies will be appended to this database as appropriate. The files are and indexed by the community names and the publications in which they are utilized. Please see the linked accompanying reports for a more detailed description of the development and use of individual tsunami source models. This data collection is released with an open end-user license. All files can be downloaded from the Alaska Division of Geological & Geophysical Surveys website, http://doi.org/10.14509/30953.The compilation of co-seismic slip distributions for hypothetical earthquakes, along with corresponding maps depicting regional uplift/subsidence, serves as input for numerical models addressing tsunami generation, propagation, and inundation in specific target communities. Certain communities face potential threats from tsunamigenic landslides, where the initial thickness of these hypothetical landslides is also considered.>source_model: Raster data file(s) that provide the geometry and location parameters used to calculate the location of the maximum innundation line and water depth of each tsunamigenic scenario. In some cases, the data package will include shapefiles or other additional supporting data.19992024ground conditionCompleteUnknown-180.000000180.00000071.39202951.217293ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysActive FaultAlaska Earthquake 1964BathymetryCoastalCoastal and RiverDGGSDebris AvalancheDebris FlowEarthquakeEarthquake Related Slope FailureEmergency PreparednessEngineeringEngineering GeologyEnvironmentalFault DisplacementFaultingFaultsFloodGeologicGeologic HazardsGeological ProcessGeologyGeomorphologyGeotechnicalHazardsInundationLand SubsidenceLandslideLandslide SusceptibilityMarineMarine GeologyModelingNeotectonicsOutreachRaster ImageRegionalRock AvalancheRockfallSedimentSedimentationSeismic GapSeismic HazardsSeismic InterpretationSeismologySlidesSlopeSlope InstabilitySlumpSubductionSubsidenceSubsurfaceSurfaceSurface Fault RuptureSurficialSurficial GeologyTectonicsTidesTopographyTsunamiUpliftWaterAlaska Division of Geological & Geophysical SurveysAlaska PeninsulaAlaska, State ofAleutian IslandsGulf of AlaskaSouthcentral AlaskaSoutheast AlaskaWalker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of AmericaHoloceneThis 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).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.Alaska Division of Geological & Geophysical SurveysGIS Managermailing and physical
3354 College Rd
FairbanksAK99709-3707USA907-451-5020dggsgis@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysSeveral awards from the National Oceanic and Atmospheric Administration/National Weather Service Office (NOAA/NWS) through the National Tsunami Hazard Mitigation Program to the Alaska Division of Homeland Security and Emergency Management, the University of Alaska, Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, funded the generation of these data. This acknowledgment does not imply an endorsement by NOAA/NWS. Numerical calculations for this work were supported by High-Performance Computing resources at the Research Computing Systems unit at the Geophysical Institute, University of Alaska, Fairbanks. Multiple authors contributed to the development of the tsunami sources over the lifespan of the project; detailed information is provided in the originating tsunami modeling reports. See the accompanying reports for specific contributions and authorship.Larsen, M.C.Nicolazzo, J.A.Athey, J.E.2023Landslide hazards in AlaskaInformation CircularIC 96Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/31100Salisbury, J.B.2019Earthquakes in AlaskaInformation CircularIC 73Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30097Salisbury, J.B.2019Living with earthquakes in AlaskaInformation CircularIC 77Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30144Salisbury, J.B.Strait, S.H.Ruppert, Natalia2020Earthquake early warning system for Alaska: fact sheetInformation CircularIC 88Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30454Salisbury, J.B.Suleimani, E.N.Nicolsky, D.J.West, M.E.2021Tsunami hazards: Frequently asked questionsInformation CircularIC 91Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30581Salisbury, J.B.Janssen, K.A.2022Tsunamis in AlaskaInformation CircularIC 85 v. 2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30849Stevens, D.S.P.Wolken, G.J.Hubbard, T.D.Hendricks, K.A.2018Landslides in AlaskaInformation CircularIC 65Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/29849The largest uncertainty in modeling inundation due to the tectonic tsunami is associated with the prescription of co-seismic slip distribution. True slip depends on the geometry for the Alaska-Aleutian megathrust and other crustal faults used in the models. We used a variety of megathrust geometries, as updates became available over the lifespan of the project through our partners at the United States Geological Survey (USGS); detailed information on the megathrust geometry or crustal fault is given in the related tsunami modeling report. Hypothetical landslides are thought to occur in the river or creek deltas where unconsolidated material is accumulated. The initial thickness of the landslide sources is compared to similar historical events to ensure a realistic volume of the mass failure. Landslide volumes estimates are based on paleo-slides that are identifiable in bathymetry or otherwise best estimates given the local conditions. Detailed info about DEM and input sources are provided in the related tsunami modeling report.The results we generate with numerical models are dependent on the resolution of input datasets (i.e. fault geometries) and topographic and bathymetric data used in computations. Therefore, the known and unknown uncertainty parameters related to each model will be unique.DGGS anticipates ongoing development of additional seismic and non-seismic digital tsunami sources from future hazard studies will be appended to this database.The accuracy is prescribed through the plate interface and fault geometries as well as locations of previous landslides or areas with modern submarine sediment accumulation.Throughout the project, we use WGS84 geoid to specify coordinates of the co-seismic slip and ground surface deformation. The initial landslide thickness is related to the current digital elevation model (DEM) used for modeling tsunami propagation and runup; detailed information about the DEM is provided in the associated tsunami modeling report.Earthquake sources - We generate geologically plausible hypothetical co-seismic slip distributions that produce maximum-considered (i.e., worst-case) tsunami inundation in target communities. We constrain these earthquake scenarios based on the current, collective body of knowledge about subduction zone geometry and dynamics using geodetic, geologic, and paleoseismic data in the appropriate regional setting. We also utilize a broader understanding of subduction zone behavior from the global scientific community. The considered co-seismic slip distribution is prescribed on the subducting plate interface or along the hypothetical crustal faults in the area, see details in the corresponding modeling report for details of the interface geometry. Numerical calculations of the co-seismic deformation are conducted with the MATLAB or FORTRAN software package using the Okada solution, derived from a Green's function solution to the elastic half-space problem.2024Landslide sources - We generate landslide tsunami sources based on historical data or by identifying signatures of submarine slides in modern bathymetric data near our target communities. The initial landslide volume and thickness profiles are computed in MATLAB.2024raster.00001.01111decimal degreesNAD83GRS 806378137298.257222101NAVD88; Geoid12A; EPOCH 2010.006.2centimetersImplicit coordinateSource modelRaster data file(s) that provide the geometry and location parameters used to calculate the location of the maximum innundation line and water depth of each tsunamigenic scenario. In some cases, the data package will include shapefiles or other additional supporting data.Models are selected by UAF Alaska Earthquake Center staff and source citations for each model are provided in the tsunami inundation reports that utilize the model.source_modelPublicationDGGS publication numberDGGSfree textCommunity NameName of the communityGNIS placenamesfree textScenario Number Model NameScenario number in the applicable reportApplicable reportfree textCase IDArctic Region Supercomputing Center or Geophysical Institute Research Computing Systems case identification numberUniversity of Alaska Fairbanksfree textState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveysmailing and physical
3354 College Road
FairbanksAK99709-3707USA907-451-5020907-451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.DDS 21The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and 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.DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.see http://dx.doi.org/10.14509/30953databasehttp://dx.doi.org/10.14509/30953Free download20240227Simone Montaynemailing and physical
3354 College Road
FairbanksAK99709-3707USA907-451-5020FGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998If the user has modified this metadata file in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent this metadata file, 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.http://www.dggs.alaska.gov/metadata/dggs.extdggs metadata extensions","source_transform":null,"status":"error"}