Tsunami inundation maps for the city of Sand Point, Alaska

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...

Tags: Active Fault, Alaska Earthquake 1964, Aleutian Islands, Bathymetry, Coastal, All tags... Coastal and River, Earthquake, Emergency Preparedness, Engineering, Engineering Geology, Fault Displacement, Faulting, Faults, Flood, Geologic Hazards, Geology, Hazards, Humboldt Harbor, Inundation, Land Subsidence, Modeling, Popof Island, Raster Image, Sand Point, Seismic Gap, Seismic Hazards, Seismology, Shumagin Islands, Surface, Topography, Tsunami, Water, geoscientificInformation, Fewer tags

Digital data for geologic framework of the AlaskaPeninsula, southwest Alaska, and the Alaska Peninsulaterrane

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99-317 is a collection of digitaldatabases that are the result of the compilation andre-interpretation of published and unpublished 1:250,000-and 1:63,360-scale mapping.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.

Tags: 02013 = Aleutians East, 02060 = Bristol Bay, 02150 = Kodiak Island, 02164 = Lake and Peninsula, 1100 - Geology, All tags... 1101 - General, 3100 - Vector, 3110 - ESRI, 3112 - export, Afognak, Alaska, Alaska Peninsula, Aniakchak National Monument and Preserve, Becharof National Wildlife Refuge, Bristol Bay, Chignik, Cold Bay, False Pass, Izembek National Wildlife Refuge, Karluk, Mt. Katmai, Naknek, Port Moller, Shumagin Islands, Simeonof Island, Stepovak Bay, Sutwik Island, Ugashik, Unga Island, Unimak Island, bedrock geologic units, geologic maps, geologic structure, geology, geoscientificInformation, geospatial datasets, southwestern Alaska, surficial geologic units, Fewer tags