DGGS Staff 2016 digital data Digital Data Series DDS 12 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://doi.org/10.14509/29555 This magnetic anomaly map of Alaska provides a statewide view of magnetic anomalies in Alaska. This composite magnetic anomaly grid is a merge of the available, public-domain, digital, magnetic surveys for the state of Alaska as of 2015. The grid was compiled by Richard Saltus (USGS). The data, as well as additional metadata, are available from the Alaska Division of Geological & Geophysical Surveys website: http://dggs.alaska.gov/pubs/id/29555 This magnetic anomaly map of Alaska provides a statewide view of magnetic anomalies in Alaska. This information fills the need for a statewide view of magnetic anomalies in Alaska to evaluate the state's structure, geologic processes, and tectonic evolution. >alaska_magnetic_anomaly_merge_2015: Geosoft-format binary grids, GeoTiff format gridded data images, KMZ/KML files and ESRI Shapefiles. 1958 2014 ground condition planned As needed 167 -129 72 46 ISO 19115 Topic Category geoscientificInformation Alaska Division of Geological & Geophysical Surveys Airborne Geophysical Survey Electromagnetic Data Electromagnetic Survey Geophysical Map Geophysical Survey Geophysics Geophysics Search Tag Gridded Data Magnetic Data Magnetic Survey Magnetics Alaska Division of Geological & Geophysical Surveys Alaska, State of This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Alaska Division of Geological & Geophysical Surveys Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Publicly available airborne and marine magnetic data were obtained from the U.S. Geological Survey (USGS), the State of Alaska Division of Geological & Geophysical Surveys(DGGS), and the National Oceanic and Atmospheric Association - National Centers for Environmental Information (NOAA-NCEI). This data release was compiled by the USGS (Richard Saltus) and the DGGS. Geological Survey of Canada U.S. Geological Survey 2015 Canada Natural Resources Canada http://gdr.agg.nrcan.gc.ca/gdrdap/dap/index-eng.php?productid=1587 Grid values represent the total intensity of the Earth's magnetic field after removal of the International Geomagnetic Reference Field (IGRF) and leveling to a satellite-based long-wavelength crustal magnetic field (MF7). Measurements were made using a variety of magnetometer systems with typical accuracies of 1 to 10 nanotesla (nT). The grids presented in this report were made from numerous individual grids that were mathematically merged together using the Intrepid GridMerge software. Geophysical data were acquired according to contractor, contract, and request for proposals specifications. The data in the original grids have been processed using formulas and methods that are not usually documented but that represent industry-standard practices for airborne data reduction. The data in this file were collected by the various contractors or groups who were responsible for collecting and processing the data. The data used to make the original grids were collected using different instruments (magnetometers, altimeters, navigational systems) throughout the survey, but were usually consistent within each survey. Survey contracts specified the conditions and specifications under which these data were collected. Standard industry practices of the time were followed in data collection and processing. Geophysical data were acquired according to contractor, contract, and request for proposals specifications. The magnetic anomaly grids were compiled from the best available aeromagnetic surveys publicly available in 2015. Best available would be data having the highest resolution, closest line-spacing, most accurate instrumentation, most accurate flight-elevation surface, and similar specifications commonly used in the airborne surveying industry. In many areas, only one survey was available. In many offshore areas and some onshore areas, no data were available at all, and these areas were left blank. Flight Path Recovery - before about 1975: Horizontal position of the survey aircraft used to collect data were determined by reconciling down-looking photographs (recorded on continuous-strip film) with topographic maps and orthophoto quadrangle maps. Fiducial numbers and marks, impressed on any paper strips that were recording data or added to magnetic tape records, were included as a function of time to further reconcile location with instrumentation. Flight Path Recovery - before about 1990: Horizontal position of the survey aircraft used to collect data were determined using aircraft navigational aids such as line-of-sight electronic systems that measure the distances from each of two ground stations to the aircraft using microwave or radio transmitters. Flight Path Recovery - after about 1990: Horizontal position of the survey aircraft used to collect data were determined using GPS satellite navigation. Alaska Division of Geological & Geophysical Surveys 1975 Alaska Open-File Report AOF 73 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/168 250000 paper or digital data 1975 publication date Alaska Division of Geological & Geophysical Surveys, 1975 Data compilation Alaska Division of Geological & Geophysical Surveys 1975 Alaska Open-File Report AOF 78 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 4 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/173 250000 paper or digital data 1975 publication date Alaska Division of Geological & Geophysical Surveys, 1975 Data compilation Alaska Division of Geological & Geophysical Surveys 1975 Alaska Open-File Report AOF 79 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/174 250000 paper or digital data 1975 publication date Alaska Division of Geological & Geophysical Surveys, 1975 Data compilation Alaska Division of Geological & Geophysical Surveys Fugro Airborne Surveys Stevens Exploration Management Corp. Burns, L.E. 2002 Geophysical Report GPR 2002-12 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/2830 paper or digital data 2002 publication date Alaska Division of Geological & Geophysical Surveys and others, 2002 Data compilation Bailey, K.A. Cooper, A.K. Marlow, M.S. Scholl, D.W. 1976 Miscellaneous Field Studies Map MF 716 United States U.S. Geological Survey 1 sheet, scale 1:2,500,000 http://dggs.alaska.gov/pubs/id/13293 2500000 paper or digital data 1976 publication date Bailey, K.A. and others, 1976 Data compilation Brown, P.J. 2003 Open-File Report OF 2003-319 United States U.S. Geological Survey http://dggs.alaska.gov/pubs/id/14803 paper or digital data 2003 publication date Brown, P.J., 2003 Data compilation Burns, L.E. Barefoot, J.D. Graham, G.R.C. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2019-7 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 12 p http://doi.org/10.14509/30178 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Barefoot, J.D. Graham, G.R.C. Naibert, T.J. Geoterrex-Dighem Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2019-8 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 22 p http://doi.org/10.14509/30179 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Barefoot, J.D. Naibert, T.J. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2018-4 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 p http://doi.org/10.14509/29813 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Barefoot, J.D. Woods, Rebecca-Ellen WGM Mining and Geological Consultants, Inc. Dighem Surveys and Processing 2019 Geophysical Report GPR 2019-3 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 4 p http://doi.org/10.14509/30167 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Barefoot, J.D. Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2019-6 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 p http://doi.org/10.14509/30172 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Emond, A.M. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2019-2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 p http://doi.org/10.14509/30166 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. Graham, G.R.C. Emond, A.M. 2016 Geophysical Report GPR 2016-1 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 2 sheets http://doi.org/10.14509/29557 paper or digital data 2016 publication date Burns, L.E. and others, 2016 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. Graham, G.R.C. 2015 Geophysical Report GPR 2015-3 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://doi.org/10.14509/29445 paper or digital data 2015 publication date Burns, L.E. and others, 2015 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Fugro GeoServices, Inc. 2011 Geophysical Report GPR 2011-1 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 26 sheets, scale 1:63,360, 1 DVD http://doi.org/10.14509/22562 63360 paper or digital data 2011 publication date Burns, L.E. and others, 2011 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2004 Geophysical Report GPR 2004-2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/3260 paper or digital data 2004 publication date Burns, L.E. and others, 2004 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2005 Geophysical Report GPR 2004-8 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/14454 paper or digital data 2005 publication date Burns, L.E. and others, 2005 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2005 Geophysical Report GPR 2004-6 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/7123 paper or digital data 2005 publication date Burns, L.E. and others, 2005 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2006 Geophysical Report GPR 2006-3 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 21 sheets, 1 DVD http://doi.org/10.14509/14522 paper or digital data 2006 publication date Burns, L.E. and others, 2006 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2006 Geophysical Report GPR 2006-5 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 29 sheets, 1 DVD http://doi.org/10.14509/14531 paper or digital data 2006 publication date Burns, L.E. and others, 2006 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2008 Geophysical Report GPR 2006-8 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/17761 paper or digital data 2008 publication date Burns, L.E. and others, 2008 Data compilation Burns, L.E. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2010 Geophysical Report GPR 2010-1 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 56 sheets, scale 1:63,360, 1 DVD http://doi.org/10.14509/20561 63360 paper or digital data 2010 publication date Burns, L.E. and others, 2010 Data compilation Burns, L.E. Geoterrex-Dighem Stevens Exploration Management Corp. Emond, A.M. Graham, G.R.C. 2015 Geophysical Report GPR 2015-4 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://doi.org/10.14509/29411 paper or digital data 2015 publication date Burns, L.E. and others, 2015 Data compilation Burns, L.E. Geoterrex-Dighem Stevens Exploration Management Corp. Emond, A.M. Graham, G.R.C. 2015 Geophysical Report GPR 2015-5 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://doi.org/10.14509/29412 paper or digital data 2015 publication date Burns, L.E. and others, 2015 Data compilation Burns, L.E. Geoterrex-Dighem WGM, Inc. Emond, A.M. Graham, G.R.C. 2014 Geophysical Report GPR 2014-6 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://doi.org/10.14509/27360 paper or digital data 2014 publication date Burns, L.E. and others, 2014 Data compilation Burns, L.E. Graham, G.R.C. Barefoot, J.D. Naibert, T.J. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2019-9 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 12 p http://doi.org/10.14509/30185 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Graham, G.R.C. Emond, A.M. Barefoot, J.D. CGG Fugro GeoServices, Inc. 2019 Geophysical Report GPR 2019-10 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 21 p http://doi.org/10.14509/30188 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. Naibert, T.J. Barefoot, J.D. Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2019 Geophysical Report GPR 2018-9 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 12 p http://doi.org/10.14509/29852 paper or digital data 2019 publication date Burns, L.E. and others, 2019 Data compilation Burns, L.E. SIAL Geosciences, Inc. On-line Exploration Services, Inc. 2008 Geophysical Report GPR 2008-4 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/16681 paper or digital data 2008 publication date Burns, L.E. and others, 2008 Data compilation Burns, L.E. Stevens Exploration Management Corp. Fugro Airborne Surveys U.S. Bureau of Land Management 2000 Geophysical Report GPR 2000-38 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/2721 paper or digital data 2000 publication date Burns, L.E. and others, 2000 Data compilation Burns, L.E. U.S. Bureau of Land Management Fugro Airborne Surveys Corp. Stevens Exploration Management Corp. 2006 Geophysical Report GPR 2006-1 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 43 sheets, 1 DVD http://doi.org/10.14509/14501 paper or digital data 2006 publication date Burns, L.E. and others, 2006 Data compilation Burns, L.E. U.S. Bureau of Land Management Fugro Airborne Surveys Stevens Exploration Management Corp. 2003 Geophysical Report GPR 2003-6 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/2973 paper or digital data 2003 publication date Burns, L.E. and others, 2003 Data compilation Burns, L.E. U.S. Bureau of Land Management Fugro Airborne Surveys Stevens Exploration Management Corp. 2003 Geophysical Report GPR 2003-10 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/2994 paper or digital data 2003 publication date Burns, L.E. and others, 2003 Data compilation Cady, J.W. 1991 Geophysical Investigations Map GP 992 United States U.S. Geological Survey 2 sheets, scale 1:500,000 http://dggs.alaska.gov/pubs/id/13575 500000 paper or digital data 1991 publication date Cady, J.W., 1991 Data compilation Case, J.E. Tysdal, R.G. Hillhouse, J.W. Gromme, C.S. 1979 Miscellaneous Field Studies Map MF 880-D United States U.S. Geological Survey 2 sheets, scale 1:250,000 http://dggs.alaska.gov/pubs/id/13369 250000 paper or digital data 1979 publication date Case, J.E. and others, 1979 Data compilation Childs, J.R. Cooper, A.K. Wright, A.W. 1981 Geophysical Investigations Map GP 939 United States U.S. Geological Survey 1 sheet, scale 1:1,000,000 http://dggs.alaska.gov/pubs/id/24004 1000000 paper or digital data 1981 publication date Childs, J.R. and others, 1981 Data compilation Cooper, A.K. Bailey, K.A. Howell, J.I. Marlow, M.S. Scholl, D.W. 1976 Miscellaneous Field Studies Map MF 715 United States U.S. Geological Survey 1 sheet, scale 1:2,500,000 http://dggs.alaska.gov/pubs/id/23601 2500000 paper or digital data 1976 publication date Cooper, A.K. and others, 1976 Data compilation DGGS Staff Dighem WGM, Inc. U.S. Bureau of Land Management 1997 Public Data File PDF 97-42 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/1807 paper or digital data 1997 publication date DGGS Staff and others, 1997 Data compilation DGGS Staff Dighem WGM, Inc. 1997 Public Data File PDF 97-22 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/1765 paper or digital data 1997 publication date DGGS Staff and others, 1997 Data compilation DGGS Staff Dighem WGM, Inc. 1998 Public Data File PDF 98-31 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/1856 paper or digital data 1998 publication date DGGS Staff and others, 1998 Data compilation DGGS Staff On-line Exploration Services, Inc. SIAL Geosciences, Inc. U.S. Bureau of Land Management 1998 Public Data File PDF 98-24 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 DVD http://doi.org/10.14509/1850 paper or digital data 1998 publication date DGGS Staff and others, 1998 Data compilation DGGS Staff Zonge Engineering Research Organization, Inc. GEONEX Aero Service 1995 Report of Investigation RI 95-1 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 2 sheets, scale 1:125,000 http://doi.org/10.14509/2513 125000 paper or digital data 1995 publication date DGGS Staff and others, 1995 Data compilation Decker, J.E. Dillon, J.T. 1982 Alaska Open-File Report AOF 179 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:250,000 http://doi.org/10.14509/115 250000 paper or digital data 1982 publication date Decker, J.E. and Dillon, J.T., 1982 Data compilation Decker, J.E. Dillon, J.T. 1982 Alaska Open-File Report AOF 176 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:250,000 http://doi.org/10.14509/112 250000 paper or digital data 1982 publication date Decker, J.E. and Dillon, J.T., 1982 Data compilation Decker, J.E. Dillon, J.T. 1982 Alaska Open-File Report AOF 178 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:250,000 http://doi.org/10.14509/114 250000 paper or digital data 1982 publication date Decker, J.E. and Dillon, J.T., 1982 Data compilation Decker, J.E. Dillon, J.T. 1982 Alaska Open-File Report AOF 177 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:250,000 http://doi.org/10.14509/113 250000 paper or digital data 1982 publication date Decker, J.E. and Dillon, J.T., 1982 Data compilation Decker, John Karl, S.M. 1977 Open-File Report OF 77-166-E United States U.S. Geological Survey 1 sheet, scale 1:1,000,000 http://dggs.alaska.gov/pubs/id/12339 1000000 paper or digital data 1977 publication date Decker, John and Karl, S.M., 1977 Data compilation Fisher, M.A. Moore, G.W. von Huene, R. McClellan, P.H. 1981 Miscellaneous Field Studies Map MF 1227 United States U.S. Geological Survey 1 sheet, scale 1:500,000 http://dggs.alaska.gov/pubs/id/13023 500000 paper or digital data 1981 publication date Fisher, M.A. and others, 1981 Data compilation Fugro Airborne Surveys Stevens Exploration Management Corp. Burns, L.E. Graham, G.R.C. 2018 Geophysical Report GPR 2018-10 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 12 p http://doi.org/10.14509/29690 paper or digital data 2018 publication date Fugro Airborne Surveys and others, 2018 Data compilation Griscom, Andrew 1979 Miscellaneous Field Studies Map MF 870-B United States U.S. Geological Survey 5 p., 2 sheets, scale 1:250,000 http://dggs.alaska.gov/pubs/id/13336 250000 paper or digital data 1979 publication date Griscom, Andrew, 1979 Data compilation Hackett, S.W. 1978 Alaska Open-File Report AOF 107H Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://doi.org/10.14509/17 63360 paper or digital data 1978 publication date Hackett, S.W., 1978 Data compilation Jachens, R.C. 1984 Bulletin B 1525 United States U.S. Geological Survey p. 53-62 http://dggs.alaska.gov/pubs/id/4583 paper or digital data 1984 publication date Jachens, R.C., 1984, p. 53-62 Data compilation Miller, T.P. Anderson, L.A. 1969 Open-File Report OF 69-170 United States U.S. Geological Survey 6 p., 8 sheets http://dggs.alaska.gov/pubs/id/10820 paper or digital data 1969 publication date Miller, T.P. and Anderson, L.A., 1969 Data compilation Saltus, R.W. Haeussler, P.J. Bracken, R.E. Doucette, J.P. Jachens, R.C. 2001 Open-File Report OF 2001-85 United States U.S. Geological Survey 21 p http://dggs.alaska.gov/pubs/id/14707 paper or digital data 2001 publication date Saltus, R.W. and others, 2001 Data compilation Saltus, R.W. Simmons, G.C. 1997 Open-File Report OF 97-520 United States U.S. Geological Survey 15 p http://dggs.alaska.gov/pubs/id/14626 paper or digital data 1997 publication date Saltus, R.W. and Simmons, G.C., 1997 Data compilation Sander, S.D. 1997 Public Data File PDF 97-28 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 32 p., 6 sheets, scale 1:125,000 http://doi.org/10.14509/1777 125000 paper or digital data 1997 publication date Sander, S.D., 1997 Data compilation Schwab, W.C. Bruns, T.R. 1979 Miscellaneous Field Studies Map MF 1054 United States U.S. Geological Survey 1 sheet, scale 1:500,000 http://dggs.alaska.gov/pubs/id/12992 500000 paper or digital data 1979 publication date Schwab, W.C. and Bruns, T.R., 1979 Data compilation U.S. Geological Survey 1973 Open-File Report OF 73-305 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/10988 250000 paper or digital data 1973 publication date U.S. Geological Survey, 1973 Data compilation U.S. Geological Survey 1974 Open-File Report OF 74-1101 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/11021 250000 paper or digital data 1974 publication date U.S. Geological Survey, 1974 Data compilation U.S. Geological Survey 1976 Open-File Report OF 76-170 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12023 250000 paper or digital data 1976 publication date U.S. Geological Survey, 1976 Data compilation U.S. Geological Survey 1976 Open-File Report OF 76-188 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12022 250000 paper or digital data 1976 publication date U.S. Geological Survey, 1976 Data compilation U.S. Geological Survey 1977 Open-File Report OF 77-359 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12028 250000 paper or digital data 1977 publication date U.S. Geological Survey, 1977 Data compilation U.S. Geological Survey 1977 Open-File Report OF 77-572 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12026 250000 paper or digital data 1977 publication date U.S. Geological Survey, 1977 Data compilation U.S. Geological Survey 1978 Open-File Report OF 78-262 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12046 250000 paper or digital data 1978 publication date U.S. Geological Survey, 1978 Data compilation U.S. Geological Survey 1978 Open-File Report OF 78-1086 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12205 250000 paper or digital data 1978 publication date U.S. Geological Survey, 1978 Data compilation U.S. Geological Survey 1978 Open-File Report OF 78-263 United States U.S. Geological Survey 11 sheets, scale 1:63,360 http://dggs.alaska.gov/pubs/id/12045 63360 paper or digital data 1978 publication date U.S. Geological Survey, 1978 Data compilation U.S. Geological Survey 1979 Open-File Report OF 79-529 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12057 250000 paper or digital data 1979 publication date U.S. Geological Survey, 1979 Data compilation U.S. Geological Survey 1979 Open-File Report OF 79-381 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12059 250000 paper or digital data 1979 publication date U.S. Geological Survey, 1979 Data compilation U.S. Geological Survey 1979 Open-File Report OF 79-223 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12062 250000 paper or digital data 1979 publication date U.S. Geological Survey, 1979 Data compilation U.S. Geological Survey 1979 Open-File Report OF 79-380 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12060 250000 paper or digital data 1979 publication date U.S. Geological Survey, 1979 Data compilation U.S. Geological Survey 1979 Open-File Report OF 79-832 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12053 250000 paper or digital data 1979 publication date U.S. Geological Survey, 1979 Data compilation U.S. Geological Survey 1979 Open-File Report OF 79-224 United States U.S. Geological Survey 2 sheets, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12061 250000 paper or digital data 1979 publication date U.S. Geological Survey, 1979 Data compilation U.S. Geological Survey 1980 Open-File Report OF 80-57 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12083 250000 paper or digital data 1980 publication date U.S. Geological Survey, 1980 Data compilation U.S. Geological Survey 1980 Open-File Report OF 80-58 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12082 250000 paper or digital data 1980 publication date U.S. Geological Survey, 1980 Data compilation U.S. Geological Survey 1981 Open-File Report OF 81-1158 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12288 250000 paper or digital data 1981 publication date U.S. Geological Survey, 1981 Data compilation U.S. Geological Survey 1984 Open-File Report OF 84-352 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12143 250000 paper or digital data 1984 publication date U.S. Geological Survey, 1984 Data compilation U.S. Geological Survey 1984 Open-File Report OF 84-351 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12144 250000 paper or digital data 1984 publication date U.S. Geological Survey, 1984 Data compilation U.S. Geological Survey 1984 Open-File Report OF 84-666 United States U.S. Geological Survey 3 sheets, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12139 250000 paper or digital data 1984 publication date U.S. Geological Survey, 1984 Data compilation U.S. Geological Survey 1984 Open-File Report OF 84-296 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12146 250000 paper or digital data 1984 publication date U.S. Geological Survey, 1984 Data compilation U.S. Geological Survey 1984 Open-File Report OF 84-295 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12147 250000 paper or digital data 1984 publication date U.S. Geological Survey, 1984 Data compilation U.S. Geological Survey 1985 Open-File Report OF 85-605 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12150 250000 paper or digital data 1985 publication date U.S. Geological Survey, 1985 Data compilation U.S. Geological Survey 2002 Open-File Report OF 2002-267 United States U.S. Geological Survey http://dggs.alaska.gov/pubs/id/14800 paper or digital data 2002 publication date U.S. Geological Survey, 2002 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 21 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/120 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 3 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 2 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/128 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 18 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/116 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 20 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/119 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 19 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/117 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 5 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/150 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 6 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/153 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 7 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/164 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 14 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/59 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 8 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/175 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/118 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Veach, N.J. 1973 Alaska Open-File Report AOF 4 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:250,000 http://doi.org/10.14509/139 250000 paper or digital data 1973 publication date Veach, N.J., 1973 Data compilation Data compilation - USGS obtained all available aeromagnetic surveys. Some data were digitized from analog maps if digital data were unavailable. The remainder were processed using digital flight-line data. Details of data acquisition for older surveys (prior to about 1999) are described in the website that accompanied the previous Alaska State magnetic compilation release (Saltus and others, 1999). Many of the newer surveys included in this compilation were collected and released by the Alaska State Division of Geophysical and Geological Surveys. Some of the marine data were obtained from the National Geophysical Data Center of the National Oceanic and Atmospheric Administration spanned the years 1958 through 1997. Other Marine data were digitized from published maps (see data index table that accompanies the magnetic grid release) Alaska Division of Geological & Geophysical Surveys, 1975 Alaska Division of Geological & Geophysical Surveys, 1975 Alaska Division of Geological & Geophysical Surveys, 1975 Alaska Division of Geological & Geophysical Surveys and others, 2002 Bailey, K.A. and others, 1976 Brown, P.J., 2003 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2016 Burns, L.E. and others, 2015 Burns, L.E. and others, 2011 Burns, L.E. and others, 2004 Burns, L.E. and others, 2005 Burns, L.E. and others, 2005 Burns, L.E. and others, 2006 Burns, L.E. and others, 2006 Burns, L.E. and others, 2008 Burns, L.E. and others, 2010 Burns, L.E. and others, 2015 Burns, L.E. and others, 2015 Burns, L.E. and others, 2014 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2019 Burns, L.E. and others, 2008 Burns, L.E. and others, 2000 Burns, L.E. and others, 2006 Burns, L.E. and others, 2003 Burns, L.E. and others, 2003 Cady, J.W., 1991 Case, J.E. and others, 1979 Childs, J.R. and others, 1981 Cooper, A.K. and others, 1976 DGGS Staff and others, 1997 DGGS Staff and others, 1997 DGGS Staff and others, 1998 DGGS Staff and others, 1998 DGGS Staff and others, 1995 Decker, J.E. and Dillon, J.T., 1982 Decker, J.E. and Dillon, J.T., 1982 Decker, J.E. and Dillon, J.T., 1982 Decker, J.E. and Dillon, J.T., 1982 Decker, John and Karl, S.M., 1977 Fisher, M.A. and others, 1981 Fugro Airborne Surveys and others, 2018 Griscom, Andrew, 1979 Hackett, S.W., 1978 Jachens, R.C., 1984, p. 53-62 Miller, T.P. and Anderson, L.A., 1969 Saltus, R.W. and others, 2001 Saltus, R.W. and Simmons, G.C., 1997 Sander, S.D., 1997 Schwab, W.C. and Bruns, T.R., 1979 U.S. Geological Survey, 1973 U.S. Geological Survey, 1974 U.S. Geological Survey, 1976 U.S. Geological Survey, 1976 U.S. Geological Survey, 1977 U.S. Geological Survey, 1977 U.S. Geological Survey, 1978 U.S. Geological Survey, 1978 U.S. Geological Survey, 1978 U.S. Geological Survey, 1979 U.S. Geological Survey, 1979 U.S. Geological Survey, 1979 U.S. Geological Survey, 1979 U.S. Geological Survey, 1979 U.S. Geological Survey, 1979 U.S. Geological Survey, 1980 U.S. Geological Survey, 1980 U.S. Geological Survey, 1981 U.S. Geological Survey, 1984 U.S. Geological Survey, 1984 U.S. Geological Survey, 1984 U.S. Geological Survey, 1984 U.S. Geological Survey, 1984 U.S. Geological Survey, 1985 U.S. Geological Survey, 2002 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 Veach, N.J., 1973 2015 Data processing - Aeromagnetic data were processed so that residual magnetic values were calculated in a consistent manner: - The IGRF, updated to survey date, was removed. In some cases, the flight elevation was used to mathematically calculate the equivalent magnetic field at 1,000 ft. above terrain. Obvious errors were corrected. x-y locations were calculated for the described Albers Alaska projection. Data were gridded at 1/3 - 1/4 of the flight-line spacing, then regridded to 1 km. 2015 Build merge criteria - The long wavelengths of this compilation are referenced to the MF7 crustal field model of Stefan Maus based on analysis of CHAMP satellite data. 2015 Data merge - Using the GridMerge utility (Intrepid Commercial Software) gridded data were mathematically merged together. The *.job file (input) and *.rpt (output) from the GridMerge run is included in the data directory that accompanies this data release. 2015 Data cataloged for archival and publication - All files were renamed and placed in a standardized set of folders according to the DGGS Geophysics Data Management Manual. Where applicable and as needed data were converted to newer file formats and new files were created. Supporting documentation including but not limited to readme text files, maps, figures, survey overview report, missing data type explanations, and metadata were created. 2019 raster Alaska Albers 55.0 65.0 -154.0 50.0 0 0 coordinate pair 0.0000000030536018158500163 0.0000000030536018158500163 meters North American Datum of 1983 GRS 80 6378137 298.257222101000025 alaska_magnetic_anomaly_merge_2015 Geosoft-format binary grids, GeoTiff format gridded data images, KMZ/KML files and ESRI Shapefiles. Alaska Division of Geological & Geophysical Surveys (DGGS) and contractor. alaska_magnetic_anomaly_merge_2015 Alaska Division of Geological & Geophysical Surveys Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays DDS 12 The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Contact DGGS for current pricing Geosoft-format binary grids, GeoTiff format gridded data images, KMZ/KML files and ESRI Shapefiles. http://doi.org/10.14509/29555 Free download 20191002 Alaska Division of Geological & Geophysical Surveys Simone Montayne Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. http://www.dggs.alaska.gov/metadata/dggs.ext dggs metadata extensions