Description:This resource is a compilation of Alaska Active Fault features provided by the Alaska Division of Geological and Geophysical Surveys. The data contain information and location on faults and associated folds in Alaska that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). The data are intended to be part of the USGS archive for historic and ancient earthquake sources used in current and future probabilistic seismic-hazard analyses. This resource presents a single source that summarizes important information on paleoseismic (ancient earthquakes) parameters including, age of most recent deformation, slip rate, slip sense dip direction, and accuracy of original mapping. The data are compiled from hundreds of journal articles, maps, theses, and other documents, as referenced herein. The geospatial data coverage for the state of Alaska is designed to serve a variety of needs, both in terms of the user community and methods of delivering the data. The fault data are published as a Web feature service, a web map service, an ESRI MapServer, and as a downloadable Excel workbook. The Excel workbook contains 4 worksheets, including the data, resource provider information, a field list (data mapping view), and information about the template. Each feature in an active fault data set (row in this spreadsheet) should be characterized by a unique combination of name, URI, geologic history, slip, locatability and orientation properties, as well as being physically connected or inferred to be connected in the Earth. For mapped active faults, which are the scope of this scheme, the deformation style is assumed to be brittle (as opposed to ductile). This resource was provided by the Alaska Division of Geological and Geophysical Surveys and made available for distribution through the National Geothermal Data System.
Publication Date: Jun 12, 2013