• AACSE earthquake catalog: January-August, 2019

      Ruppert, Natalia; Barcheck, Grace; Abers, Geoffrey (2021-05)
      The Alaska Amphibious Community Seismic Experiment (AACSE) comprised 75 ocean bottom seismometers and 30 land stations and covered about 650 km along the segment of the subduction zone that includes Kodiak Island, the Alaska Peninsula and the Shumagin Islands between May 2018 and September 2019. This unprecedented offshore dataset has the potential to support a greatly enhanced earthquake catalog by both increasing the number of detected earthquakes and improving the accuracy of their source parameters. We use all available regional and AACSE campaign seismic data to compile an enhanced earthquake catalog for the region between Kodiak and Shumagin Islands including Alaska Peninsula (51-59N, 148-163W). We apply the same processing and reporting standards to additional picks and events as the Alaska Earthquake Center currently use for compilation of the authoritative regional earthquake catalog. This release includes earthquake catalogs for the time period between January 01 and July 31, 2019. We include monthly CSS database tables (aecevent, arrival, assoc, event, netmag, origerr, origin) and quakeml files.
    • AACSE earthquake catalog: May-December, 2018

      Ruppert, Natalia A.; Barcheck, Grace; Abers, Geoffrey A. (2021-02)
      The Alaska Amphibious Community Seismic Experiment (AACSE) comprised 75 ocean bottom seismometers and 30 land stations and covered about 650 km along the segment of the subduction zone that includes Kodiak Island, the Alaska Peninsula and the Shumagin Islands between May, 2018 and September, 2019 (Barcheck et al., 2020). This unprecedented dataset has the potential to support a greatly enhanced earthquake catalog by both increasing the number of detected earthquakes and improving the accuracy of their source parameters. We use all available regional and AACSE campaign seismic data to compile an enhanced earthquake catalog for the region between Kodiak and Shumagin Islands including Alaska Peninsula (51-59N, 148-163W). We apply the same processing and reporting standards to additional picks and seismic events as the Alaska Earthquake Center currently use for compilation of the authoritative regional earthquake catalog. This release includes earthquake catalogs for the time period between May 12 and December 31, 2018 (3829 events total 1132 of which are newly detected). We include monthly CSS database tables and quakeml files. The data analysis is ongoing and more catalogs will be released in the near future.
    • Alaska Aspect Map

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The aspect map is a raster image file that includes aspect value at 60 m spatial resolution derived from the Alaskan Digital Elevation Model (DEM). The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Digital Elevation Model (DEM)

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The Digital Elevation Model (DEM) is a raster image file that includes elevation value at 60 m spatial resolution. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Land Status Map

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2013)
      The shape file includes vector polygons of Alaska land status. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of 1-km Space Grid Points

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      A lattice point grid with a 1-km Euclidean distance in a total point number of 1,522,655 in Alaska. The map is prepared as a shape file and the geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of Bark Beetle Presence

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      A shape file that we created after compiling 838 records of 68 bark beetle species, as the presence points for the model, provided by the University of Alaska Museum (UAM; http://arctos.database.museum/SpecimenSearch.cfm) in a separate tabulated record for each species. The geographic projection of the map is NAD 1983 Alaska Albers. The year the species were identified varied from 1953 to 2018, with nearly half being observed after 2011. Among the pooled bark beetle species, the most dominant genera were, Dryocoetes (n=133), Trypodendron (n=107), Ips (n=104), and Dendroctonus (n=83) (Appendix I). And, the most common species were the striped ambrosia beetle (Trypodendron lineatum (n=74)), Dryocoetes affaber (n=69), the spruce beetle (Dendroctonus rufipennis (n=66)), and the northern spruce engraver (Ips perturbatus (n=52)). The host evergreen trees from which the bark beetle specimens were collected consisted of white spruce (Picea glauca), black spruce (P. mariana), Sitka spruce (P. sitchensis), western hemlock (Tsuga heterophylla), lodgepole pine (Pinus contorta), mountain hemlock (Tsuga mertensiana), Lutz spruce (P.a x lutzii), Tamarack (Larix laricina), Yellow cedar (Cupressus nootkatensis), and Western red cedar (Thuja plicata)).
    • Alaska Map of Bark Beetle Presence in 2016 and 2017

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      A shape file of 68 species locations, surveyed by the USFS from 2016 to 2017, which includes 3 bark beetle species. The geographic projection of the map is NAD 1983 Alaska Albers.
    • Alaska Map of Bark Beetle Pseudo-Absence

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      We created a shape file of 5000 pseudo-absence points, with a minimum Euclidean distance from each other of 1 km across Alaska, as a background dataset with which to compare bark beetle presences. The 5000 random point locations were generated in ArcMap 10.4 (ESRI Inc., Redlands, CA), with the geographic projection of NAD 1983 Alaska Albers.
    • Alaska Map of Distance to Coastline

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The distance to coastline map of Alaska is a raster image file that includes Euclidean distance value from the Alaska coastline. The map is prepared at 60 m spatial resolution using vector map of the Alaska coastline. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of Distance to Drainage Network

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The Alaska map of distance to drainage network is a raster image file that includes Euclidean distance value from the Alaska drainage network with more ephemeral water channels. The map is prepared at 60 m spatial resolution using vector map of the Alaska drainage network. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of Distance to Infrastructure

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The Alaska map of distance to infrastructure is a raster image file that includes Euclidean distance value from the Alaska infrastructure. The map is prepared at 60 m spatial resolution using vector map of the Alaska infrastructure. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of Distance to Lakes and Rivers

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The Alaska map of distance to lakes and rivers is a raster image file that includes Euclidean distance value from the Alaska lakes and rivers with more permanently standing or flowing water. The map is prepared at 60 m spatial resolution using vector map of the Alaska lakes and rivers. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of Distance to Main Roads

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The Alaska map of distance to main roads is a raster image file that includes Euclidean distance value from the Alaska main roads. The map is prepared at 60 m spatial resolution using vector map of the Alaska main roads. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Map of Distance to Towns

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The Alaska map of distance to towns is a raster image file that includes Euclidean distance value from the Alaska towns and cities. The map is prepared at 60 m spatial resolution using vector map of the Alaska towns and cities. The geographic projection is NAD 1983 Alaska Albers.
    • Alaska Mean Monthly Precipitation in 2010

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2010)
      The folder includes 2010 average monthly precipitation across the state of Alaska as a raster image file. The spatial resolution is 60 m and the geographic projection is NAD 1983 Alaska Albers.
    • Alaska Mean Monthly Temperature in 2010

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2010)
      The folder includes 2010 average monthly temperature across the state of Alaska as a raster image file. The spatial resolution is 60 m and the geographic projection is NAD 1983 Alaska Albers.
    • Alaska National Land Cover Data 2011

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2011)
      The NLCD 2011 map of Alaska is a raster image file that includes different land cover types. The spatial resolution is 30 m and the geographic projection is NAD 1983 Alaska Albers.
    • Alaska Slope Map

      Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
      The slope map is a raster image file that includes slope value at 60 m spatial resolution derived from the Alaskan Digital Elevation Model (DEM). The geographic projection is NAD 1983 Alaska Albers.