Parent Layer: Whittier

Name: Whittier - Max Inundation Line

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Description: The purpose of this study is to evaluate potential tsunami hazards for the community of Whittier and western Passage Canal area. We numerically model the extent of inundation due to tsunami waves generated from earthquake and landslide sources. Tsunami scenarios include a repeat of the tsunami triggered by the 1964 Great Alaska Earthquake, as well as tsunami waves generated by a hypothetically extended 1964 rupture, a hypothetical Cascadia megathrust earthquake, hypothetical earthquakes in Prince William Sound, and Kodiak asperities of the 1964 rupture. Local underwater landslide and rockslide events in Passage Canal are also considered as credible tsunamigenic scenarios. Results of numerical modeling combined with historical observations in the region are intended to provide guidance to local emergency management agencies in tsunami hazard assessment, evacuation planning, and public education for reducing future tsunami damage.

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Copyright Text: This project was supported by the National Oceanic and Atmospheric Administration grants 27-014d and 06- 028a through Cooperative Institute for Arctic Research. Numerical calculations for this work were supported by a grant of High Performance Computing (HPC) resources from the Arctic Region Supercomputing Center (ARSC) at the University of Alaska Fairbanks as part of the U.S. Department of Defense High Performance Computing Modernization Program. Reviews by Dr. Timothy Walsh and Dr. Juan Horrillo improved the report and maps. We thank R. Grapenthin and B. Witte for their help with the RTK GPS survey in Whittier.

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