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Welcome to the U.S. Geological Survey (USGS) Alaska Science Center (ASC), headquartered in Anchorage, Alaska. At the ASC, all of the USGS Mission Area Programs are managed collectively with a vision to achieving an integrated landscape level understanding of the highly diverse and complex Alaskan and Arctic Ecosystems. The mission of the Alaska Science Center is to provide objective and timely data, information, and research findings about the earth and its flora and fauna to Federal, State, and local resource managers and the public to support sound decisions regarding natural resources, natural hazards, and ecosystems in Alaska and circumpolar regions.
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River shown in panoramic images 568 and 569. Shown as it disappears in cavern. Aguadilla or Arecibo County, Puerto Rico. February 1922.
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The Seattle cluster is named for Seattle, Washington, U.S.A., a city considered to be at considerable risk from a great earthquake on the Cascadia subduction zone. The seismicity in the cluster occurs in two depth ranges, in the crust from ~5-30 km and on the slab interface at depths of 45-65 km. The cluster includes the 6.5 Ms earthquake on April 29, 1965 and the 6.6 Ms earthquake on February 28, 2001, both on the slab interface, and several magnitude 5.0-5.2 events in the crust. Station coverage in the area is exceptional, making epicentral location calibration very robust, but depth resolution is complicated by an exceptional degree of velocity heterogeneity beneath Puget Sound, where shear wave velocities are...
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The code repository for the quality controll processing, data creation, modelling, and mapping or trend estimation is at https://github.com/USFWS/ACP-Mapping. The full history of the quality control process and issues is documented in R code file in this repository. Please report any addition errors to https://github.com/USFWS/ACP-Mapping/issues and follow update of this repositiry to keep track of new errors and updates to data sets, maps, or trend estimates.
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The Arctic Coastal Plain Aerial Breeding Pair Survey provides data on distribution, abundance, and trend of 33 bird species that nest in northern Alaska. The survey has been conducted in its current form annually since 2007. Methods follow the standard operating procedures for the Waterfowl Breeding Population and Habitat Survey. Primary uses of the survey data are to evaluate recovery status of Spectacled Eider (Somateria fischeri) and Steller’s Eider (Polysticta stelleri), as well as monitor species of conservation concern including Lesser Snow Goose (Chen caerulescens caerulescens), Yellow-billed Loon (Gavia adamsii), Red-throated Loon (G. stellata), and Black Brant (Branta bernicla nigricans). Survey data are...
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This collection of files contains the reports that were produced when the raw data were quality-checked against the defined standards in the “Transcribed Data Dictionary” using the “GreenLight” function of the R Package “AKaerial.” The QC log files document the quality control process, data standards, and what changes (if any) were made in the QC data compared to the raw data. Each log file was named following the same file naming conventions: SSS_YYYY_QCLog_OOOO_yyyy-mm-dd, where; YKD = Duck data, YKG = Goose data or YYY=Year, OOOO = observer’s first initial and last name,yyyy-mm-dd = year, month, and day the AKaerial.R (“GreenLight”) function in was most recently executed
map background search result map search result map River shown as it disappears in cavern. Aguadilla or Arecibo County, Puerto Rico. 1922. Alaska Science Center (ASC) Alaska Arctic Coastal Plain Breeding Waterbird Aerial Survey 2007-Present Arctic Coastal Plain Aerial Survey Github Code Repository Alaska Yukon-Kuskokwim Delta Aerial Survey Raw Data Quality Reports USA, Washington, Seattle: 1965-2023 River shown as it disappears in cavern. Aguadilla or Arecibo County, Puerto Rico. 1922. USA, Washington, Seattle: 1965-2023 Alaska Yukon-Kuskokwim Delta Aerial Survey Raw Data Quality Reports Alaska Arctic Coastal Plain Breeding Waterbird Aerial Survey 2007-Present Arctic Coastal Plain Aerial Survey Github Code Repository Alaska Science Center (ASC)