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Staff from Alaska Earthquake Center, Geophysical Institute and Alaska Division of Geological & Geophysical Surveys evaluated potential tsunami hazards for the city of Sand Point, on Popof Island in the Shumagin Islands archipelago. We numerically modeled the extent of inundation from tsunami waves generated by local and distant earthquake sources. We considered the results in light of historical observations. The worst-case scenarios are defined by analyzing results of the sensitivity study of the tsunami dynamics with respect to different slip distributions along the Aleutian megathrust. For the Sand Point area, the worst-case scenarios are thought to be thrust earthquakes in the Shumagin Islands region with magnitudes...
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USGS-Open-File Report 99-317 is a collection of digitaldatabases that are the result of the compilation andre-interpretation of published and unpublished 1:250,000-and 1:63,360-scale mapping. The map area coversapproximately 62,000 sq km (23,000 sq mi) in land area andencompasses much of 13 1:250,000-scale quadrangles on theAlaska Peninsula in southwestern Alaska. This reportshows the bedrock geology of the following 1:250,000 scalequadrangles: Naknek, Mt. Katmai, Ugashik, Chignik, SutwikIsland, Cold Bay, Port Moller, Stepovak Bay, False Pass,Simeonof Island, Bristol Bay; and parts of Afognak andKarluk.


    map background search result map search result map Digital data for geologic framework of the AlaskaPeninsula, southwest Alaska, and the Alaska Peninsulaterrane Tsunami inundation maps for the city of Sand Point, Alaska Tsunami inundation maps for the city of Sand Point, Alaska Digital data for geologic framework of the AlaskaPeninsula, southwest Alaska, and the Alaska Peninsulaterrane