Identification_Information: Citation: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Salisbury, J.B. Publication_Date: 2018 Title: Tsunami inundation maps for Skagway and Haines, Alaska Geospatial_Data_Presentation_Form: report and digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2018-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 69 p., 3 sheets Online_Linkage: http://doi.org/10.14509/30029 Description: Abstract: In this report we evaluate potential tsunami hazards for the southeastern Alaska communities of Skagway and Haines 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, Japan tsunami at Skagway and comparing our results to instrument records. Analysis of calculated and observed water level dynamics for the 2011 event in Skagway reveals that the model underestimates the observed wave heights in the city by a factor of 1.5, likely due to complex tsunami-tide interactions. We compensate for this underestimation numerically by increasing the coseismic slip of the hypothetical tsunami sources in our models. Potential hypothetical maximum credible tsunami sources include variations of the extended 1964 rupture and megathrust earthquakes in the Prince William Sound and Alaska Peninsula regions. Local underwater landslide events in Taiya, Chilkoot, and Chilkat inlets are also considered as possible tsunamigenic scenarios. The results show that the maximum predicted wave height resulting from a tectonic tsunami is 2-3 m (7-10 ft) in Skagway and Haines, while the maximum landslide-generated tsunami may cause a runup of 15-16 m (49-52 ft). Results presented here are intended to provide guidance to local emergency management agencies in tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards. Users can access the complete report and digital data from the DGGS website: http://doi.org/10.14509/30029. Purpose: Results presented here are intended to provide guidance to local emergency management agencies in tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards. Supplemental_Information: >max-flow-depth: Raster image depicting maximum composite flow depths over dry land. Pixel values provide the modeled depth (in meters) of maximum inundation. For each grid point, the pixel value provides the modeled depth of water (in meters) over previously dry land, representing the maximum depth value of all calculated tsunami scenarios. >max-inundation: Estimated, "maximum credible scenario" inundation line(s) that encompasses the maximum extent of flooding based on model simulation of all credible source scenarios and historical observations. The maximum credible scenario inundation lines are intended to be utilized as a basis for local tsunami hazard planning and development of evacuation maps. >scenarios-haines: Collection of shapefiles that depict the modeled potential maximum inundation by tsunami waves for each Haines modeled scenario. Detailed information about each scenario can be found in the accompanying report. >scenarios-skagway: Collection of shapefiles that depict the modeled potential maximum inundation by tsunami waves for each Skagway modeled scenario. Detailed information about each scenario can be found in the accompanying report. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2013 Ending_Date: 2017 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -135.573580 East_Bounding_Coordinate: -135.290000 North_Bounding_Coordinate: 59.493852 South_Bounding_Coordinate: 59.080200 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Active Fault Theme_Keyword: Bathymetry Theme_Keyword: Coastal Theme_Keyword: Coastal and River Theme_Keyword: Earthquake Theme_Keyword: Earthquake Related Slope Failure Theme_Keyword: Emergency Preparedness Theme_Keyword: Engineering Theme_Keyword: Engineering Geology Theme_Keyword: Environmental Theme_Keyword: Fault Displacement Theme_Keyword: Faulting Theme_Keyword: Faults Theme_Keyword: Flood Theme_Keyword: Geologic Theme_Keyword: Geologic Hazards Theme_Keyword: Geological Process Theme_Keyword: Geology Theme_Keyword: Geotechnical Theme_Keyword: Hazards Theme_Keyword: Inundation Theme_Keyword: Land Subsidence Theme_Keyword: Landslide Theme_Keyword: Marine Geology Theme_Keyword: Modeling Theme_Keyword: Neotectonics Theme_Keyword: Seismic Hazards Theme_Keyword: Slides Theme_Keyword: Slope Theme_Keyword: Slope Instability Theme_Keyword: Slump Theme_Keyword: Subsidence Theme_Keyword: Surface Theme_Keyword: Tectonics Theme_Keyword: Tides Theme_Keyword: Topography Theme_Keyword: Tsunami Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Anchorage Point Place_Keyword: Battery Point Place_Keyword: Chilkat Inlet Place_Keyword: Chilkat Peninsula Place_Keyword: Chilkoot Inlet Place_Keyword: Dalasuga Island Place_Keyword: Dayehas Creek Place_Keyword: Deshu Isthmus Place_Keyword: Dyea Point Place_Keyword: False Battery Point Place_Keyword: Ferebee River Place_Keyword: Ferebee Valley Place_Keyword: Glacier Point Place_Keyword: Green Point Place_Keyword: Haines Place_Keyword: Haska Creek Place_Keyword: Indian Rock Place_Keyword: Jenkins Rock Place_Keyword: Kalhagu Cove Place_Keyword: Kaskulu Point Place_Keyword: Katzehin River Place_Keyword: Kelgaya Bay Place_Keyword: Kelgaya Point Place_Keyword: Kochu Island Place_Keyword: Lehunua Island Place_Keyword: Lehunua Point Place_Keyword: Letnikof Cove Place_Keyword: Lily Lake Place_Keyword: Low Point Place_Keyword: Ludaseska Creek Place_Keyword: Lutak Inlet Place_Keyword: McClellan Flats Place_Keyword: Mink Creek Place_Keyword: Mount Riley Trail Place_Keyword: Mount Ripinski Place_Keyword: Nahku Bay Place_Keyword: Nahku Portage Place_Keyword: Nukdik Point Place_Keyword: Paradise Cove Place_Keyword: Port Chilkoot Place_Keyword: Portage Cove Place_Keyword: Pyramid Harbor Place_Keyword: Rustabach Lake Place_Keyword: Seduction Point Trail Place_Keyword: Shiyi Bay Place_Keyword: Skagway Place_Keyword: Skagway River Place_Keyword: Smugglers Cove Place_Keyword: Taiya Point Place_Keyword: Taiya River Place_Keyword: Taiyasanka Harbor Place_Keyword: Tanani Bay Place_Keyword: Tanani Beach Place_Keyword: Tanani Point Place_Keyword: Tanani Village Place_Keyword: Tlegu Beach Place_Keyword: Yakutania Point Place_Keyword: Yindastuki Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Holocene 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). 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: This report was funded by Award NA16NWS4670030 by a National Tsunami Hazard Mitigation Program grant to Alaska Division of Homeland Security and Emergency Management and University of Alaska Fairbanks from the Department of Commerce/National Oceanic and Atmospheric Administration. This does not constitute an endorsement by NOAA. Numerical calculations for this work were supported by High Performance Computing (HPC) resources at the Research Computing Systems unit at the Geophysical Institute, University of Alaska Fairbanks. Thoughtful reviews by Stephan Grilli (University of Rhode Island) and Richard Koehler (University of Nevada) improved the report. Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Hansen, R.A. Originator: Combellick, R.A. Originator: Carver, G.A. Publication_Date: 2002 Title: Tsunami hazard maps of the Kodiak area, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2002-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 16 p., 4 sheets, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/2860 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Combellick, R.A. Originator: Marriott, D. Originator: Hansen, R.A. Originator: Venturato, A.J. Originator: Newman, J.C. Publication_Date: 2005 Title: Tsunami hazard maps of the Homer and Seldovia areas, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2005-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 28 p., 2 sheets, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/14474 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: West, D.A. Originator: Combellick, R.A. Originator: Hansen, R.A. Publication_Date: 2010 Title: Tsunami inundation maps of Seward and northern Resurrection Bay, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2010-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 47 p., 3 sheets, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/21001 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Combellick, R.A. Originator: Hansen, R.A. Publication_Date: 2011 Title: Tsunami inundation maps of Whittier and western Passage Canal, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2011-7 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 65 p., 4 sheets Online_Linkage: http://doi.org/10.14509/23244 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Wolken, G.J. Originator: Combellick, R.A. Originator: Hansen, E. Publication_Date: 2011 Title: APPENDIX B: Potential rockfall-generated tsunami at Whittier, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2011-7A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: p. 57-65 Online_Linkage: http://doi.org/10.14509/23283 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Haeussler, P.J. Originator: Ryan, H.F. Originator: Koehler, R.D. Originator: Combellick, R.A. Originator: Hansen, R.A. Publication_Date: 2013 Title: Tsunami inundation maps of Port Valdez, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2013-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 77 p., 1 sheet, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/25055 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Koehler, R.D. Publication_Date: 2013 Title: Tsunami inundation maps of Sitka, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2013-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 76 p., 1 sheet, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/26671 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2014 Title: Tsunami inundation maps of Cordova and Tatitlek, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2014-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 49 p., 2 sheets Online_Linkage: http://doi.org/10.14509/27241 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2014 Title: Tsunami inundation maps of the villages of Chenega Bay and northern Sawmill Bay, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2014-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 50 p., 7 sheets Online_Linkage: http://doi.org/10.14509/29126 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Koehler, R.D. Publication_Date: 2015 Title: Tsunami inundation maps of Elfin Cove, Gustavus, and Hoonah, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2015-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 79 p., 3 sheets Online_Linkage: http://doi.org/10.14509/29404 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Freymueller, J.T. Originator: Koehler, R.D. Publication_Date: 2015 Title: Tsunami inundation maps of Fox Islands communities, including Dutch Harbor and Akutan, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2015-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 67 p., 2 sheets, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/29414 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Koehler, R.D. Originator: Freymueller, J.T. Originator: Macpherson, A.E. Publication_Date: 2016 Title: Tsunami inundation maps for King Cove and Cold Bay communities, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2016-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 73 p., 2 sheets, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/29565 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Koehler, R.D. Publication_Date: 2016 Title: Tsunami inundation maps for Yakutat, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2016-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 47 p., 1 sheet, scale 1:10,000 Online_Linkage: http://doi.org/10.14509/29577 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2016 Title: Tsunami inundation map for the village of Nikolski, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2016-7 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 34 p., 1 sheet, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/29674 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2016 Title: Tsunami inundation maps for the communities of Chignik and Chignik Lagoon, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2016-8 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 48 p., 2 sheets, scale 1:12,500 Online_Linkage: http://doi.org/10.14509/29675 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Koehler, R.D. Originator: Salisbury, J.B. Publication_Date: 2017 Title: Regional tsunami hazard assessment for Andreanof Islands, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2017-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 19 p., 2 sheets Online_Linkage: http://doi.org/10.14509/29704 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2017 Title: Tsunami inundation maps for the city of Sand Point, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2017-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 61 p., 4 sheets, scale 1:15,000 Online_Linkage: http://doi.org/10.14509/29706 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Freymueller, J.T. Originator: Koehler, R.D. Publication_Date: 2017 Title: Potential maximum permanent flooding maps for Unalaska and Akutan, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2015-5A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets Online_Linkage: http://doi.org/10.14509/29728 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Koehler, R.D. Publication_Date: 2017 Title: Updated tsunami inundation maps of the Kodiak area, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2017-8 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 38 p., 10 sheets Online_Linkage: http://doi.org/10.14509/29740 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Originator: Salisbury, J.B. Publication_Date: 2017 Title: Tsunami inundation maps for Juneau, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2017-9 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 66 p., 5 sheets Online_Linkage: http://doi.org/10.14509/29741 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2017 Title: Potential maximum permanent flooding maps for Chenega, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2014-3A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:3,500 Online_Linkage: http://doi.org/10.14509/29751 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Koehler, R.D. Publication_Date: 2017 Title: Potential maximum permanent flooding maps for the communities of Chignik and Chignik Lagoon, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2016-8A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets Online_Linkage: http://doi.org/10.14509/29753 Cross_Reference: Citation_Information: Originator: Nicolsky, D.J. Originator: Suleimani, E.N. Originator: Salisbury, J.B. Publication_Date: 2018 Title: Tsunami inundation maps for Skagway and Haines, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2018-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 69 p., 3 sheets Online_Linkage: http://doi.org/10.14509/30029 Cross_Reference: Citation_Information: Originator: Suleimani, E.N. Originator: Nicolsky, D.J. Originator: Salisbury, J.B. Publication_Date: 2018 Title: Updated tsunami inundation maps for Homer and Seldovia, Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2018-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 97 p., 4 sheets Online_Linkage: http://doi.org/10.14509/30095 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The maps showing the results of our modeling have been completed using the best information available and are believed to be accurate, however, their preparation required many assumptions. We described several scenarios and provide an estimate of maximum credible tsunami inundation. Actual conditions during a tsunami event may vary from those considered, so the accuracy cannot be guaranteed. The limits of inundation shown should be used only as a guideline for emergency planning and response action. Actual areas inundated will depend on specifics of the earth deformations, on-land construction, and tide level, and they may differ from areas shown on the map. The information on this map is intended to provide a basis for state and local agencies to plan emergency evacuation and tsunami response actions in the event of a major tsunamigenic earthquake. These results are not intended for land-use regulation or building-code development. This DGGS Report of Investigations is a final report of scientific research. Several scientists familiar with the subject matter provided technical reviews. Uncertainties associated with the depiction or interpretation of various features are discussed in the manuscript. Logical_Consistency_Report: Model validation for this report included comparison of the modeled results to observations that were recorded during historic events. Completeness_Report: The results of our modeling have been completed using the best information available and are believed to be accurate; however, their preparation required many assumptions and actual conditions during a tsunami event may vary from those considered. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The hydrodynamic model used to calculate propagation and runup of tsunami waves is a nonlinear, flux-formulated, shallow-water model that has passed the validation and verification tests required for models used in production of tsunami inundation maps. The uncertainties in tsunami modeling include bottom friction, presence or absence of buildings and vegetation in DEMs, the time delay between the observed and computed tsunami arrivals discussed above, the lack of horizontal deformation in the displacement models, and assumption of instantaneous displacement. The tsunami scenarios that we calculate in this report are considered to be sufficient to capture the worst-case tsunami event, but there are still an infinite number of possible slip distributions. Further details about the limitations of the employed modeling approach are described in earlier reports by Suleimani and others and Nicolsky and others, as well as in National Tsunami Hazard Mitigation Program guidelines. The accuracy of the later waves is limited by the accuracies of the bathymetry and coastline that are outside the extent of the high-resolution DEM but still impact the modeling. See accompanying report for more detail. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The vertical accuracy of the inundation modeling is dependent on the accuracy and resolution of the digital elevation models (DEMs) and tidal datum values that were used to compile the computational grid. We provide additional details about DEM and grid development in the accompanying report. Prior to scenario modeling, bathymetric data were shifted to use Mean Higher High Water (MHHW) as the vertical datum. The depths of inundation shown should be used only as a guideline for emergency planning and response action. Actual inundation water depth will depend on specifics of the earth deformations, on-land construction, and tide level, and they may differ from areas shown by this data. The information is intended to permit state and local agencies to plan emergency evacuation and tsunami response actions in the event of a major tsunamigenic earthquake. These results are not intended for land-use regulation or building-code development. For additional information please reference the sources of errors and uncertainties section of the associated manuscript. Lineage: Process_Step: Process_Description: Model validation - The numerical model that we used for simulation of tsunami wave propagation and runup was validated through a set of analytical benchmarks and tested against laboratory data. The model solves water equations using a finite-difference method on a staggered grid. See the accompanying report for more detail and additional model information. Process_Date: 2011 Process_Step: Process_Description: Development of nested grids - To support inundation modeling of coastal areas in Alaska, we used a series of nested telescoping grids, or digital elevation models (DEMs), as input layers for tsunami inundation modeling and mapping. These grids of increasing resolution allowed us to propagate waves generated by various sources to Haines and Skagway. In order to propagate a wave from its source to various coastal locations, we used embedded grids, placing a large, coarse grid in deep water and coupling it with smaller, finer grids in shallow water areas. The extent of each grid used for our tsunami inundation mapping is listed in the accompanying report. See Methodology and Data section of the accompanying report for more detail and additional grid development source information. Process_Date: 2014 Process_Step: Process_Description: Model verification - To estimate tsunami propagation and runup in the Haines and Skagway area, we verified our model against the observed tsunami generated by the March 11, 2011, Mw 9.0 Tohoku earthquake in Japan. Process_Date: 2016 Process_Step: Process_Description: Numerical simulations of hypothetical tsunami scenarios - We assessed hazard related to tectonic tsunamis in Haines and Skagway by performing model simulations for each hypothetical source scenario. Numerical results for each scenario include extent of inundation, sea level and velocity time series calculations, tsunami flow depth over land, and the maximum water level above the MHHW tide level offshore and within the potential inundation area. We create raster files of model results. For each grid point, the pixel value provides the modeled depth of water (in meters). See the accompanying report for more detail and additional information. Process_Date: 2016 Process_Step: Process_Description: Calculation of the potential inundation lines - For each grid cell in the high-resolution DEMs Haines and Skagway, we determined whether the cell was inundated by waves or stayed dry throughout the entire simulation. Then, we defined a function such that it is equal to one at the center of each wet cell and is negative one at the center of each dry cell. Using a linear interpolation algorithm in Matlab, we plotted a zero-value contour that delineates dry and wet cells from each other. The resultant contour line (or a collection of lines) was directly exported to the ArcGIS using WGS84 datum. Process_Date: 2017 Process_Step: Process_Description: Compilation of composite maximum inundation zone, flow depths over land, and water level above the MHHW tide level offshore and within the potential inundation area - We interpret the maximum, geologically credible, worst case scenario by combining the maximum calculated inundation of all scenarios. See the accompanying report for more detail and additional information. Process_Date: 2017 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: .000001 Longitude_Resolution: .000001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257223563000025 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Mean Higher High Water Depth_Resolution: 1 Depth_Distance_Units: meter Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: max-flow-depth Entity_Type_Label: ri2018-2-max-flow-depth-haines.tif, ri2018-2-max-flow-depth-skagway.tif Entity_Type_Definition: Raster image depicting maximum composite flow depths over dry land. Pixel values provide the modeled depth (in meters) of maximum inundation. For each grid point, the pixel value provides the modeled depth of water (in meters) over previously dry land, representing the maximum depth value of all calculated tsunami scenarios. File format: GeoTIFF Entity_Type_Definition_Source: Alaska Earthquake Center, Geophysical Institute, University of Alaska, this report Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: max-inundation Entity_Type_Label: ri2018-2-max-inundation-haines.shp, ri2018-2-max-inundation-skagway.shp Entity_Type_Definition: Estimated, "maximum credible scenario" inundation line(s) that encompasses the maximum extent of flooding based on model simulation of all credible source scenarios and historical observations. The maximum credible scenario inundation lines are intended to be utilized as a basis for local tsunami hazard planning and development of evacuation maps. File format: shapefile Entity_Type_Definition_Source: Alaska Earthquake Center, Geophysical Institute, University of Alaska, this report Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: scenarios-haines Entity_Type_Label: ri2018-2-scenario-01m-haines.shp, ri2018-2-scenario-04m-haines.shp, ri2018-2-scenario-10-haines.shp, ri2018-2-scenario-11-haines.shp, ri2018-2-scenario-12-haines.shp, ri2018-2-scenario-13-haines.shp Entity_Type_Definition: Collection of shapefiles that depict the modeled potential maximum inundation by tsunami waves for each Haines modeled scenario. Detailed information about each scenario can be found in the accompanying report. File format: shapefile Entity_Type_Definition_Source: Alaska Earthquake Information Center, Geophysical Institute, University of Alaska, this report Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: scenarios-skagway Entity_Type_Label: ri2018-2-max-inundation-skagway.shp, ri2018-2-scenario-01m-skagway.shp, ri2018-2-scenario-04m-skagway.shp, ri2018-2-scenario-09-skagway.shp Entity_Type_Definition: Collection of shapefiles that depict the modeled potential maximum inundation by tsunami waves for each Skagway modeled scenario. Detailed information about each scenario can be found in the accompanying report. File format: shapefile Entity_Type_Definition_Source: Alaska Earthquake Information Center, Geophysical Institute, University of Alaska, this report Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Resource_Description: RI 2018-2 Distribution_Liability: 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. Standard_Order_Process: Non-digital_Form: 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. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Shapefiles, Raster data Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://doi.org/10.14509/30029 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20181120 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Person: Simone Montayne Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions