Magnetic anomaly map of North America
Airborne measurement of the earth's magnetic field over all of North America provides gridded data describing the magnetic anomaly caused by variations in earth materials and structure. |
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Introduction to potential fields: magnetics
Explanation of the Earth's magnetic field and how USGS measures it. Defines magnetic anomaly, induced and remanent magnetism in rocks, and describes magnetic anomaly maps. |
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Compiling magnetic databases
Explains the process used to compile and analyze data from diverse magnetic surveys of an area to produce a consistent synoptic data set portraying the magnetic anomalies of the region. |
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Aeromagnetic and gravity maps of the central Marysvale volcanic field, southwestern Utah
Maps (no data) depicting aeromagnetic and Bouguer gravity anomaly in the study area. Report discusses rock sample density and magnetic properties, but data are buried in PDF tables. |
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Aeromagnetic, gravity anomaly, and derivative maps of the Craig and Dixon Entrance 1°x3° quadrangles of southeastern Alaska
A simplified geologic map, raw gravity and magnetic data, with derivative products including depth-to-source and rock densities, with limited interpretations of the underlying geology, structures, and mineral resources. |
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Helicopter electromagnetic and magnetic survey maps and data, East Poplar oil field area, August 2004, Fort Peck Indian Reservation, northeastern Montana
Grids, line data, and imagery derived from them covering the small study area. |
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Magnetic and gravity anomaly maps of West Virginia
Aeromagnetic surveys of West Virginia, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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A helicopter-borne magnetic survey over Dixie Valley geothermal field, Nevada
Gridded data from helicopter study of shallow geologic structures |
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A preliminary full spectrum magnetic anomaly grid of the United States with improved long wavelengths for studying continental dynamics
The long-wavelength (50-2,500 km) content of the regional magnetic anomaly compilation was improved by utilizing a nearly homogeneous a nearly homogeneous set of NURE magnetic surveys flown from 1975 to 1981 |
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Aeromagnetic and aeromagnetic-based geologic maps of the Coastal Belt, Franciscan Complex, northern California
New aeromagnetic point observation data with grids as well |
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Aeromagnetic data, processing, and maps of Fort Irwin and vicinity, California
Aeromagnetic data help provide the underpinnings of a hydrogeologic framework for Fort Irwin by locating inferred structural features or grain that influence groundwater flow. Magnetization boundaries defined by horizontal-gradient analyses coincide lo |
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Airborne Magnetic Total-Field Survey, Iron Mountain-Menominee Region, Michigan-Wisconsin, USA
Airborne magnetic survey data collected from this area to better understand the lithology and structure of exposed and concealed Precambrian rocks in support of mineral resource investigations. Results are provided in Geosoft database, grid exchange format, GeoTiff, and CSV. |
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Airborne Magnetic Total-Field Survey, Manchester Region, Iowa, USA
Airborne magnetic survey data collected from this area to understand Precambrian rocks concealed under Paleozoic sedimentary rocks in northeast Iowa. Data are provided in GXF grid and CSV formats. Flight lines are provided in shapefile format. |
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An interpretation of the aeromagnetic and gravity data and derivative maps of the Craig and Dixon Entrance 1-degree by 3-degree quadrangles and the western edges of the Ketchikan and Prince Rupert quadrangles, Southeastern Alaska
One DVD not available from the Alaska DGGS and not available from the USGS. |
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Arizona aeromagnetic and gravity maps and data
Aeromagnetic surveys of Arizona, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Arkansas and Louisiana aeromagnetic and gravity maps and data
Aeromagnetic surveys of Arkansas and Louisiana, merged to form seamless grids across the states. Gravity anomaly data are provided as well. |
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Colorado aeromagnetic and gravity maps and data
Aeromagnetic surveys of Colorado, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Digital Aeromagnetic Datasets for the Conterminous United States and Hawaii - A Companion to the North American Magnetic Anomaly Map
Digital and analog archives comprising more than 1,000 surveys, covering approximately 8,000,000 line-km of data, flown at various flight heights and line spacings |
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Geologic and aeromagnetic maps of the Fossil Ridge area and vicinity, Gunnison County, Colorado
Geologic units, structural features, and aeromagnetic anomaly map of the area |
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Georgia aeromagnetic and gravity maps and data
Aeromagnetic surveys of Georgia, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Helicopter electromagnetic and magnetic survey data and maps, northern Bexar County, Texas
Grids, images, and flight-line paths for magnetic and resistivity surveys |
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Helicopter electromagnetic and magnetic survey data and maps, Seco Creek area, Medina and Uvalde Counties, Texas
Airborne geophysical data and a summary of the hydrologic application. |
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Illinois, Indiana, and Ohio magnetic and gravity maps and data
Aeromagnetic surveys of Illinois, Indiana, and Ohio, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Iowa magnetic and gravity maps and data
Aeromagnetic surveys of Iowa, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Michigan magnetic and gravity maps and data
Best available public-domain aeromagnetic and gravity data in the State of Michigan merged into composite grids. Magnetic data compiled from 25 separate magnetic surveys. |
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Missouri aeromagnetic and gravity maps and data
Aeromagnetic surveys of Missouri, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Montana aeromagnetic and gravity maps and data
Aeromagnetic surveys of Montana, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Nebraska, Kansas, and Oklahoma aeromagnetic and gravity maps and data
Aeromagnetic surveys of Nebraska, Kansas, and Oklahoma, merged to form seamless grids across the states. Gravity anomaly data are provided as well. |
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Nevada magnetic and gravity maps and data
Aeromagnetic surveys of Nevada, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats. |
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New England states aeromagnetic and gravity maps and data
Aeromagnetic surveys of New England, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats. |
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New Jersey aeromagnetic and gravity maps and data
Aeromagnetic surveys of New Jersey, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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New Mexico aeromagnetic and gravity maps and data
Aeromagnetic surveys of New Mexico, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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North Dakota aeromagnetic and gravity maps and data
Aeromagnetic surveys of North Dakota, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Oregon magnetic and gravity maps and data
Aeromagnetic surveys of Oregon, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Preliminary aeromagnetic anomaly map of California
Map showing magnetic anomaly of California composed by merging and editing data from 123 distinct surveys conducted previously. |
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Preliminary grid data and maps for an aeromagnetic survey of the Taylor Mountains quadrangle and a portion of the Bethel quadrangle, Alaska
Preliminary data (grids and images) and maps for a new aeromagnetic survey |
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Puget Sound (Washington) aeromagnetic maps and data
Gridded data and maps for individual quadrangles and for the entire compilation |
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South Carolina aeromagnetic and gravity maps and data
Aeromagnetic surveys of South Carolina, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats. |
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South Dakota aeromagnetic and gravity maps and data
Aeromagnetic surveys of South Dakota, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Texas magnetic and gravity maps and data
Aeromagnetic surveys of Texas, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats. |
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Updated aeromagnetic and gravity anomaly compilations and elevation-bathymetry models over Lake Superior
New gravity and magnetic compilations and elevation-bathymetry models compiled for the Lake Superior region, providing continuous sets of observations for geologic interpretations spanning political boundaries such as US States and the US-Canada border where bedrock geology is largely concealed beneath glacial deposits and surface water. Data are provide in GeoTiff, GXF, and CSV (for gravity station data) formats. |
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Utah aeromagnetic and gravity maps and data
Aeromagnetic surveys of Utah, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Virginia aeromagnetic and gravity maps and data
Aeromagnetic surveys of Virginia, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats. |
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Washington aeromagnetic maps and data:
Aeromagnetic surveys of Washington state, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Wisconsin aeromagnetic and gravity maps and data
Aeromagnetic surveys of Wisconsin, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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Wyoming aeromagnetic and gravity maps and data
Aeromagnetic surveys of Wyoming, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
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A Review of Aeromagnetic Anomalies in the Sawatch Range, Central Colorado
The report contains digital data, primarily a layer of polygons linked to records summarizing previous interpretations of aeromagnetic anomalies. Data are presented in updated format for input to a GIS, standard graphics software, or map-plotting package. |
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Aerial magnetic, electromagnetic, and gamma-ray survey, Berrien county, Michigan
Maps, grids, and flight-line databases of a detailed aerial survey and maps and grids of satellite data |
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Aeromagnetic and aeroradiometric data acquired over parts of the Trans-Pecos region of West Texas and Southern New Mexico
Magnetic anomaly and radiometric data for this area, to understand the geological structure and processes controlling the presence and distribution of alkaline igneous rocks that may be enriched in rare earth elements. Data are provided in CSV, GeoTiff, and Geosoft XYZ (flight-line) formats, packaged using the compressed 7-zip format. |
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Aeromagnetic and aeroradiometric data for the conterminous United States and Alaska from the National Uranium Resource Evaluation (NURE) program of the U.S. Department of Energy
Aeroradiometric and aeromagnetic flight-line data from surveys flown at 400 feet with line spacing from 3 to 6 miles from 1974 through 1981. |
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Aeromagnetic and gravity data over the central Transantarctic Mountains (CTAM), Antarctica
Gridded and tabular magnetic data and gravity station observations. Maps depicting the data are included in the report. |
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Aeromagnetic and gravity surveys in Afghanistan
Collection of historical gravity and aeromagnetic data in Afghanistan (1911 through 1967) |
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Aeromagnetic data centered over Skelton Neve, Antarctica
Gridded aeromagnetic and ground-based gravity station data |
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Aeromagnetic Data of Alturas, California, and Surrounding Areas
Aeromagnetic survey data giving the calculated magnetic anomaly. Data are provided in CSV format. |
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Aeromagnetic expression of buried basaltic volcanoes near Yucca Mountain, Nevada
Mathematical modeling and analysis of aeromagnetic anomaly data (gridded data provide in another report). |
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Aeromagnetic map for the state of Idaho
Aeromagnetic surveys of Idaho, merged to form seamless grids across the state. Data provided in a variety of formats. |
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Aeromagnetic map of part of northwestern Wisconsin and adjacent areas | Info |
Aeromagnetic survey in Afghanistan
Digital files and descriptions of airborne and ground collected magnetic data in Afghanistan |
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Aeromagnetic survey map of the central California coast ranges
Intended to promote further understanding of the geology and structure in the central California Coast Ranges, includes downloadable gridded point database. |
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Aeromagnetic survey of Dillingham Area in Southwest Alaska
Gridded survey data with summary map images. |
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Aeromagnetic survey of Medina and Uvalde Counties, Texas
Flight-line data, flight-line and aeromagnetic anomaly map images |
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Aeromagnetic survey of Taylor Mountains area in southwest Alaska
Map and flight-line data, with documentation of the survey |
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Aeromagnetic survey of the Amargosa desert, Nevada and California
Grid data files along with maps in PDF and PostScript accompany this report |
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Aeromagnetic surveying in Wisconsin 1977-98 | Info |
Aeromagnetic surveying in Wisconsin 1998-99
Aeromagnetic flight-line measurements and gridded anomaly data |
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Aeromagnetic surveys in Afghanistan: An updated website for distribution of data
Gridded aeromagnetic anomaly data, along with aeromagnetic observations obtained during 2008. |
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Aeromagnetic surveys in the Anchorage, Iliamna, and Tyonek quadrangles, Alaska
Gridded data from aeromagnetic surveys |
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Aeromagnetic surveys in Yukon Flats Alaska
Flight-line data from the aeromagnetic survey |
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Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019
Airborne electromagnetic and magnetic survey data were collected during 2019 along 1,467 line-kilometers in this area. The survey was flown at a mean flight height of 140 meters (m) above terrain and line spacings ranging from 150 m to 600 m. Data are provided in CSV and shapefile formats. |
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Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012
Airborne electromagnetic and magnetic survey data in 2012 along 556 line-kilometers over this volcano flown at a nominal flight height of 30 meters (m) above terrain with a nominal spacing of 250 m. Data are provided in CSV and GeoTiff formats. |
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Airborne electromagnetic and magnetic survey data, northeast Wisconsin
Airborne electromagnetic and magnetic survey data collected during 2021 over 3,170 line kilometers with nominal flight height of 30 - 40 m above terrain and nominal line spacing of 0.5 miles. Data are provided in Geosoft database, Geosoft grid, GeoTiff, Geosoft map, and netCDF formats. |
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Airborne electromagnetic and magnetic survey data, Silverton, Colorado, 2019
Airborne electromagnetic and magnetic survey data collected during April and May 2019 along 1,467 line-kilometers in this area. Data are provided in netCDF format. |
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Airborne electromagnetic and magnetic survey data, southeastern San Joaquin Valley near Cawelo, California, 2016
Airborne electromagnetic (AEM) and magnetic survey data to support groundwater salinity mapping and hydrogeologic framework development. Data are provided in CSV format. |
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Airborne electromagnetic and magnetic survey, southwestern San Joaquin Valley near Lost Hills, California, 2016
Airborne electromagnetic (AEM) and magnetic survey data in this area to aid groundwater studies. Includes inverted resistivity model. Data are provided in CSV, plotted sections provided in PDF. |
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Airborne Electromagnetic and Magnetic Survey, Yellowstone National Park, 2016 - Minimally Processed Data
Airborne electromagnetic and magnetic survey data were collected during 2016 along 4,212 line-kilometers over this area. The survey was flown with a nominal line spacing of 450 meters or less, and mean flight height about 48 m providing depth of investigation about 500m. Data are provided in CSV format, flight lines in shapefile format. |
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Airborne electromagnetic data and processing within Leach Lake Basin, Fort Irwin, California
Releases airborne survey data, resistivity cross-sections and depth slices derived from data inversion. Resulting resistivity models confirm geologic framework, constrain hydrostratigraphy and depth to basement, and reveal fault and fold distribution. |
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Airborne electromagnetic mapping of the base of aquifer in areas of western Nebraska
Gridded data used to revise base of aquifer, with supporting elevation data. |
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Airborne Electromagnetic Survey Processed Data and Models Data Release, Yellowstone National Park, Wyoming, 2016
Airborne electromagnetic (AEM) and magnetic survey data were collected in 2016 along 4,212 line-kilometers over this area as part of a study of the subsurface geologic structure and geothermal and groundwater resources of Yellowstone National Park. Data are provided in CSV format. |
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Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, Mississippi Embayment, and Gulf Coastal Plain, September 2021 - January 2022
Airborne electromagnetic, magnetic, and radiometric data were acquired along 27,204 line-kilometers over this area. Data are provided in netCDF format. |
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Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, November 2018 - February 2019
Airborne electromagnetic, magnetic, and radiometric data were acquired in 2018-2019 along 16,816 line-kilometers flown at a nominal sensor flight height of 30 m above terrain with 6- to 12-kilometer spaced east-west flight lines to understand subsurface geologic structure and inform hydrologic models. Data are provided in CSV and GXF grid formats. Flight lines are provided in shapefile format. |
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Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, November 2019 - March 2020
Airborne electromagnetic, magnetic, and radiometric data were acquired from 2019 to 2020 along 24,030 line-kilometers over the Mississippi Alluvial Plain. Survey was flown at a nominal height of 120 m above terrain with 6-kilometer spaced east-west flight lines. Data are provided in ASEG-GDF2 format. |
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Airborne electromagnetic, magnetic, and radiometric survey, Shellmound, Mississippi, March 2018
Airborne electromagnetic, magnetic, and radiometric data were acquired in 2018 along 2,364 line-kilometers in this area at anominal sensor flight height of 30 m above terrain with 250 to 1,000-meter spaced flight lines. Data are provided in GXF grid, CSV, and GeoTiff formats. |
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Airborne Geophysical Surveys over the 2011 Mineral, Virginia Earthquake Area
Gravity, magnetic, and radiometric data obtained in airborne surveys conducted in 2012 with a flight line spacing of 200m and nominal height above ground 125m. Data are provided in GXF grid, GeoTiff, and CSV formats. |
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Airborne horizontal magnetic gradient and radiometric survey over parts of southeast Missouri, southern Illinois and western Kentucky - The Gap survey, 2021
Digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over this area. Data are provided in netCDF, GeoTiff, and CSV formats, |
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Airborne magnetic and radiometric survey of the southeast Mojave Desert, California and Nevada
Digital flight-line aeromagnetic and aeroradiometric survey data over of the southeast Mojave Desert, parts of California and Nevada. Data files are provided in CSV as well as Geosoft binary database and grid exchange format (GXF). |
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Airborne magnetic and radiometric survey of the Wet Mountains and surrounding region, Custer and Fremont Counties, south-central Colorado, 2021
Digital flight-line and gridded data for a high-resolution airborne magnetic and radiometric survey of this area. A total of 17,032 kilometers were flown along the lines, covering a 2,200 square-kilometer irregular area. |
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Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020
Digital flight line data for a high-resolution magnetic and radiometric survey over an area of northwest Arkansas. Data files in CSV format, with GeoTiff as well. |
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Airborne magnetic and radiometric survey, Boulder Batholith region, Montana, 2022
Digital flight line data for a high-resolution airborne magnetic and radiometric survey over this area to support geologic mapping and characterization of mineral resource potential. A total of 34,041-line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data are provided in CSV, netCDF, and GeoTIFF formats. |
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Airborne magnetic and radiometric survey, Charleston, South Carolina and surrounds, 2019
Digital flight line data for a high-resolution airborne magnetic and radiometric survey over Charleston, South Carolina and the surrounding region. Data packages in CSV format, TIFF images provided as well. |
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Airborne magnetic and radiometric survey, Columbia, South Carolina and surrounds, 2020
Digital flight line data for a high-resolution airborne magnetic and radiometric survey with goals of better understanding placer deposits containing critical mineral resources titanium, zirconium, and rare earth elements and of imaging the crystalline basement partly buried beneath Atlantic Coastal Plain sediments. Data are provided in CSV (magnetic) and netCDF (radiometric) formats as well as GeoTIFF images. |
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Airborne magnetic and radiometric survey, Idaho Cobalt Belt, Central Idaho, 2021 - Magnetic and Radiometric Data
Digital flight line data for a high resolution magnetic and radiometric survey over this area. Data are provided in CSV format. |
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Airborne magnetic and radiometric survey, Ironton, Missouri area
Digital flight line data for a high resolution horizontal magnetic gradient and radiometric survey over this area. Flight line spacing was 300 m, mean terrain clearance was 140 m. Includes flight line data for the magnetic gradient survey, flight line data for the radiometric survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. Data are provided in CSV format, flight lines are provided in shapefile format. |
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Airborne magnetic and radiometric survey, Munsungun region in northern Maine, 2021
Digital flight line data for a high-resolution airborne magnetic and radiometric survey over this area to better understanding volcanogenic massive sulfide mineral deposits, sediment hosted manganese deposits, and their surrounding geologic framework. Data are provided in CSV and GeoTiff formats. |
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Airborne magnetic and radiometric survey, northwestern Minnesota, 2021
Digital flight line data for a high-resolution airborne magnetic and radiometric survey of this area. A total of 40,139-line km of magnetic and radiometric data were acquired over an irregular-shaped area of 9140 sq km. Data are provided in CSV, GeoTIFF, and Geosoft formats. |
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Airborne magnetic and radiometric survey, southeast Missouri and western Illinois, 2018-2019
Digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over an area of southeast Missouri and western Illinois. Data are provided in CSV and GeoTiff formats. |
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Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019
Digital flight line data for a high-resolution magnetic and radiometric survey over an area of southeast Illinois, western Kentucky, and southern Indiana. Data are provided in CSV and GeoTiff formats. |
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Airborne magnetic and radiometric survey, Virginia and North Carolina Fall Zone, 2021
Digital flight line data for a high-resolution airborne magnetic and radiometric survey over this area. Data are provided in CSV and GeoTIFF formats. |
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Airborne magnetic survey over northeast North Dakota, 2000-2001
High-resolution, high-sensitivity aeromagnetic data to assess the area for anomalies and magnetic features pertaining to the local geology. Flight lines were spaced 0.25 miles (400 meters) apart in an east-west alignment. Data are provided in CSV and GeoTIFF formats. |
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Airborne magnetic survey, Iron Mountain-Chatham region, central Upper Peninsula, Michigan, 2018
Digital flight line data for a high-resolution magnetic survey with line spacing 150 meters and nominal terrain clearance 80 meters over most of the study area. Data are provided as Geosoft databases and grids. Data over two small areas (less than 1 sq km combined) were redacted because those areas include multiple tracts of Native American lands. |
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Airborne Magnetic Survey, Michigan Upper Peninsula Area, 2008
Digital flight line data from a high-resolution magnetic survey over this area. The survey was flown in 2008 by Aeroquest under contract to Kennecott Eagle Minerals Company using a fixed-wing aircraft with a magnetometer mounted in a tail stinger. The USGS has obtained this 66,074 line km subset of the survey dataset for public release. Data are provided in Geosoft database and CSV formats. |
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Alaska aeromagnetic compilation; digital grids and survey data | Info |
Alaska digital aeromagnetic database description
Basic aeromagnetic data and other airborne survey information for any region of Alaska. Flight-line point information, not grids. |
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An aeromagnetic survey in Yellowstone National Park
Grids of total magnetic intensity for the park |
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An interpretation of the 1996 aeromagnetic data for the Santa Cruz basin, Tumacacori Mountains, Santa Rita Mountains, and Patagonia Mountains, South-Central Arizona
Measurements of in-situ magnetic properties of several map units to determined whether or not mapped lithologies were responsible for aeromagnetic anomalies observed in a previous high-resolution survey (data of Sweeney, 2000). |
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Central west Antarctica aeromagnetic data
Grids and map images for separate surveys and combined compilation |
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Composite and merged aeromagnetic data for Alaska
Magnetic anomaly expressed in grids with regular spacing derived from 85 separate surveys and provided in several different formats. |
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Description of digital aeromagnetic data collected north and west of Albuquerque, New Mexico
Grids and images depicting the data |
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Digital aeromagnetic data and derivative products from a helicopter survey over the town of Blanca and surrounding areas, Alamosa and Costilla Counties, Colorado
Flight-line data, grids, and images derived from them |
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Digital aeromagnetic data and derivative products from a helicopter survey over the town of Taos and surrounding areas, Taos County, New Mexico.
Flight-line data, grids, and images derived from them |
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Digital aeromagnetic data from the Sandoval-Santa Fe, Belen, and Cochiti airborne survey, covering areas in Rio Arriba, Sandoval, Santa Fe, Socorro, and Valencia Counties, New Mexico
Grids and flight-line data for three airborne geophysical surveys |
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Digital data and derivative products from a high-resolution aeromagnetic survey of the central San Luis basin, covering parts of Alamosa, Conejos, Costilla, and Rio Grande Counties, Colorado, and Taos County, New Mexico
Digital data, image files, and text files describing data formats and survey procedures for aeromagnetic data collected during a high-resolution aeromagnetic survey in southern Colorado and northern New Mexico during October, 2004 |
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Digital data from the northeast Tusas Mountains aeromagnetic survey, north-central New Mexico
Flight-line aeromagnetic observations with gridded data derived from them. |
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Digital data from the Questa-San Luis and Santa Fe East helicopter magnetic surveys in Santa Fe and Taos Counties, New Mexico, and Costilla County, Colorado
Aeromagnetic data collected during an airborne geophysical survey. |
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Digital data from the Taos West aeromagnetic survey in Taos county, New Mexico
Digital data, image files, and text files describing data formats and survey procedures for an aeromagnetic survey covering the southwestern portion of Taos County west of the Town of Taos, New Mexico, conducted in October, 2006 |
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Digitized Aeromagnetic Datasets for the Conterminous United States, Hawaii, and Puerto Rico
Aeromagnetic anomaly values digitized from older surveys |
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Geographic Information Systems (GIS) Spatial Data Compilation of Geodynamic, Tectonic, Metallogenic, Mineral Deposit, and Geophysical Maps and Associated Descriptive Data for Northeast Asia
Diverse collection of previously published GIS datasets describing geological and geophysical characteristics of this area pertinent to the study of metallic mineral resources located there. |
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Geologic and geophysical maps of the Death Valley ground-water model area, Nevada and California
Maps and geospatial data for (a) geology; (b) tectonics; (c) isostatic gravity anomaly; (d) aeromagnetic anomaly; (e) depth to pre-Cenozoic basement. |
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Geologic and geophysical maps of the eastern three-fourths of the Cambria 30 x 60 degree quadrangle, central California Coast Ranges
Contains geologic, gravity anomaly, and aeromagnetic anomaly maps and the associated geologic and geophysical databases (ArcMap), as well as complete descriptions of the geologic map units and the structural relations in the mapped area. |
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Geophysical framework of the southwestern Nevada volcanic field and hydrogeologic implications
Report describing detailed interpretation of geophysical survey data to draw inferences about subsurface geologic features and likely consequences for the hydrogeologic system. |
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Gravity and ground magnetic data from selected traverses in the Amargosa desert and vicinity, Nevada and California
Maps of aeromagnetic data and a table of gravity station data now available for download |
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Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California
Report with gravity station data in a spreadsheet |
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Gravity and magnetic data in the vicinity of Virgin Valley, southern Nevada
Field measurements: 548 gravity and 6484 magnetic anomaly locations, data in fixed-format text files. |
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Gravity and magnetic surveys over the Santa Rita fault system, southeastern Arizona
Gravity station data and hand-held magnetometer measurements with analysis and description of methodology |
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Gravity, magnetic, and physical property data in the Smoke Creek Desert area, Northwest Nevada
Aerial, truck-towed, and hand-held magnetometer measurements, gravity station data, and sample density and magnetic susceptibility measures |
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Ground magnetic data from within the Long Valley Caldera, California
Results of a detailed ground magnetic survey |
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Ground-magnetic studies of the Amargosa desert region, California and Nevada
Hand-held magnetometer and sample magnetic susceptibility measurements used to help interpret complex patterns in the magnetic anomaly of this area. |
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Helicopter Electromagnetic and Magnetic Geophysical Survey Data for Portions of the North Platte River and Lodgepole Creek, Nebraska, June 2008
The objective of the survey was to improve the understanding of the relationship between surface water and groundwater systems critical to developing management programs for water resources. |
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Helicopter electromagnetic and magnetic geophysical survey data, Hunton anticline, south-central Oklahoma
Flight line data, grids, and inversions for these surveys are intended to help understand shallow groundwater and develop groundwater resource plans for the aquifer. |
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Helicopter electromagnetic and magnetic geophysical survey data, Oakland, Ashland, and Firth study areas, eastern Nebraska, March 2007
Electrical resistivity depicted in georeferenced grids and maps, representing different approximate depths of investigation for each area. The range of subsurface investigation is comparable to the depth of shallow aquifers. |
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Helicopter electromagnetic and magnetic geophysical survey data, Swedeburg and Sprague study areas, eastern Nebraska, May 2009
The objective of the contracted survey was to improve the understanding of the relation between surface water and groundwater systems critical to developing groundwater models used in management programs for water resources. |
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Helicopter magnetic and gravity gradiometry survey over the Pea Ridge iron mine and surrounding area, southeast Missouri, 2014
High resolution magnetic and gravity gradient data were collected in this area centered on the Pea Ridge iron oxide-apatite rare-earth element deposit. Flight lines spacing was 400 m, nominal flight height above terrain was 80 m. Includes flight line data for the gravity gradiometry survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. Data are provided in CSV format. |
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High Resolution Aeromagnetic Survey, Villa Grove, Colorado, USA, 2011
Data from a helicopter magnetic survey in this area to understand the nature of aquifers, the potential for geothermal energy resources, the likelihood of seismic hazards, and the geology of the northern Rio Grande rift. Data are provided in GXF grid and CSV formats. |
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High resolution helicopter-borne magnetic and electromagnetic survey Eureka Graben area, Colorado September 1999
Survey parameters, data acquisition and processing procedures, and products of a 1999 airborne geophysical survey of this area. Data provided in GXF format and binary formats. |
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High resolution, low altitude aeromagnetic and electromagnetic survey of Mount Rainier
Flight-line and gridded data, with description of methodology and interpretation |
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High-Resolution Aeromagnetic Survey of Mountain Pass, California
Aeromagnetic survey data from this area flown in 2016. This helicopter survey was flown at a flight-line spacing of 100 and 200 m, nominal elevation above ground of 70 m, for about 1,814 line-kilometers. Data are provided in GXF and shapefile formats. |
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High-resolution aeromagnetic survey to image shallow faults, Poncha Springs and vicinity, Chaffee county, Colorado
Survey to map concealed faults that may be related to geothermal resources, such as hot springs; data given are surface locations of faults interpreted from the survey. |
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High-Resolution Airborne Gravity Gradiometry, Magnetic, and Radiometric Data of Mountain Pass, Southeast Mojave Desert, California
Detailed airborne gravity gradiometry, magnetic, and radiometric survey data for this area flown with flight-line spacing of 100 and 200 m, nominal flight-line elevation above ground of 70 m, for about 1,814 line-kilometers. Data are provided in CSV and Geosoft database (.gdb) format. Gravity and hillshade are in GXF grids. |
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Magnetic and gravity studies of Mono Lake, east-central, California
Magnetic and gravity investigations were undertaken in Mono Lake to study regional crustal structures and to aid in understanding the geologic framework, in particular regarding potential geothermal resources and volcanic hazards throughout Mono Basin. |
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Magnetic map of the Irish Hills and surrounding areas, San Luis Obispo County, central California
Database includes new helicopter aeromagnetic data, point locations of the local maximum horizontal gradient derived from the aeromagnetic data, and physical property data. |
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Magnetic properties of Quaternary deposits, Kenai Peninsula, Alaska -- Implications for aeromagnetic anomalies of Upper Cook Inlet
Magnetic susceptibility measurements with statistical analysis |
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Magnetic susceptibility data for some exposed bedrock in the western conterminous United States
In-place rock magnetic susceptibility measurements for 746 sites are reported in a database. These data, collected from 1991 through 2012, are intended to help improve geophysical modeling of the Earth’s crust in the Western United States. |
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Magnetotelluric sounding data, stations 1-9, Taos Plateau Volcanic Field, New Mexico, 2009
Magnetotelluric sounding data collected in 2009 in this area to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. |
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Merged digital aeromagnetic data for the middle Rio Grande and southern Española Basins, New Mexico
Gridded data and images |
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Missouri Breaks Project, Montana - Digitized aeromagnetic data
Previously created but unpublished map sheets were scanned, registered, and the contours were digitized. The point data released here were extracted from the digitized contour lines and include: latitude, longitude, and magnetic-field value (gamma). Data are provided in a fixed-field columnar text format. |
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Modeling of the Climax Stock and related plutons based on the inversion of magnetic data, southwest Nevada
Mathematical modeling, coupled with new observations of magnetic susceptibility, yield better estimates of the underground configuration of granite plutons. |
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Mount Baker and Mount Adams Airborne Magnetic and Electromagnetic Survey Data, August 2002, Washington, USA
Flight line data for an airborne magnetic survey with nominal sensor height of 60m above terrain, flight-line data for a gravity gradiometry survey, with a report containing instrument and procedure details. Data are provided in CSV format. |
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Oklahoma airborne magnetic surveys
Flight line data from airborne surveys conducted in 2017, provided in comma-separated values (csv format). Three areas were flown along a draped surface with a nominal survey height above ground of 120 meters. The flight line spacing for these areas was 200 to 400 m for Area 123, in southwestern Oklahoma; 1000 m for Area 4, in northwestern Oklahoma, and 800 m for Area 5, in north-central Oklahoma. |
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Precambrian basement structure map of the continental United States-an interpretation of geologic and aeromagnetic data
Principal basement structures formed during the Precambrian in the continental United States based on interpretation of regional aeromagnetic anomaly data of North America. |
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Preliminary Aeromagnetic Map of Joshua Tree National Park and Vicinity, Southern California
This map is intended to promote further understanding of the geology and structure in the region by serving as a basis for geophysical interpretations and by supporting geological mapping, water-resource investigations, and various topical studies. |
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Preliminary gravity and magnetic data of the Lake Pillsbury northern Coast Ranges, California
Report with excel tables showing principal facts (gravity observation data) and ground magnetic data. |
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Preliminary potential-field constraints on the geometry of the San Fernando basin, southern California
Results of mathematical modeling of gravity and magnetic anomaly data to infer the geologic structure of the area |
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Revised digital aeromagnetic data for areas in and adjacent to the National Petroleum Reserve Area (NPRA), North Slope, Alaska
Redigitized and corrected data from a previously published study |
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Seven aeromagnetic surveys in California and Nevada
Grid and flight-line data files provided by the geophysical survey contractors. |
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Six aeromagnetic surveys in California, Nevada, and Arizona
Grid and flight-line data files provided to USGS by contract geophysical surveyors |
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Six aeromagnetic surveys in Nevada and California
Gridded data for aeromagnetic surveys with contractors' reports describing the data collection |
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The Longview/Lakeview barite deposits, southern National Petroleum Reserve, Alaska (NPRA); potential-field models and preliminary size estimates
Geophysical modeling used to study mineral deposit geometry. Includes 227 new gravity stations. |
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Thickness of Santa Fe group sediments in the Española Basin south of Santa Fe, New Mexico, as estimated from aeromagnetic data
Interpretation of aeromagnetic data, with geologic structure, to infer thickness and estimate capacity of an aquifer. |
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Three aeromagnetic surveys in south central Arizona
Grids and flight-line data for the surveys of this area |
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Time-domain electromagnetic surveys at Fort Irwin, San Bernardino County, California, 2010-12
Describes electromagnetic sounding locations, data acquisition, calibration, and modeling; compares data to borehole data, correlating model results; and summarizes the applications and limitations of the TEM method. Examples of models are provided. |
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A preliminary investigation of the structure of southern Yucca Flat, Massachusetts Mountain, and CP basin, Nevada Test Site, Nevada, based on geophysical modeling
Maps showing aeromagnetic survey results, locations of gravity station data, and discussions of processing within the report |
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Aerial gamma-ray survey for parts of Cameron, Hidalgo, and Willacy Counties, Texas
The USGS had an aerial survey flown over parts of Cameron, Hidalgo, and Willacy Counties in Texas. The aerial survey included measurements of the earth's magnetic field and of the radioactivity of the surface rocks and soils. |
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Aerial gamma-ray, Landsat TM, and digital elevation data, Big Bend area, Texas
This report presents the results of analyses and interpretation of aerial gamma-ray, Landsat TM, geologic, and digital elevation data of the Big Bend area in Texas. |
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Airborne Geophysical Survey Inventory of the Conterminous United States, Alaska, Hawaii, and Puerto Rico (ver. 3.0, November 2021)
Compilation of airborne geophysical surveys (magnetic, radiometric, and electromagnetic) with links, for each survey to the data, metadata, and preview images. Includes a measure of quality indicating which surveys are likely most useful for investigations of subsurface mineral deposits. Data are provided in Esri file geodatabase, shapefile, and CSV formats. |
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Airborne geophysical surveys
Airborne surveys measuring the earth's magnetic field, resistivity or other electomagnetic properties, or gamma ray emission over parts of North America. |
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Airborne geophysical surveys conducted in western Nebraska, 2010: contractor reports and data
Three contractor reports and data files for an airborne electromagnetic survey describing data aquisition and processing. Processed geophysical data were inverted to produce resistivity depth sections along flight lines. Results are described herein. |
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Airborne Geophysical Surveys over the Eastern Adirondacks, New York State
Airborne geophysical surveys were conducted in this area in 2015 with a nominal survey height above ground of 200 meters and flight line spacing 250 meters. Includes magnetic and radiometric (gamma spectrometry) data from those surveys. Data are provided in Geotiff and CSV formats. |
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Audiomagnetotelluric data, Buffalo River watershed, Arkansas, 2017
Audio-magnetotelluric sounding data collected in 2017 in this area to understand geologic structure and lithologic variations. |
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Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018
Audiomagnetotelluric sounding data collected in 2018 in this area to understand subsurface geologic structure. |
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Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2019
Audiomagnetotelluric station locations and data to characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and also to improve knowledge of deep geologic structures that may have been conduits for hydrothermal fluids that formed mineral deposits. |
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Audiomagnetotelluric survey to characterize the Sunnyside porphyry copper system in the Patagonia Mountains, Arizona
Audiomagnetotelluric (AMT) sounding data collected in 2008 in this area in support of assessments of concealed mineral resources. |
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Basement domain map of the conterminous United States and Alaska
Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain. |
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Basement domain map of the conterminous US and Alaska
Seventy-seven major components of the North American continent were delineated at a general scale (1:5,000,000); including the general composition, geological environment, and types of primary metals endowments that can be expected in each domain. |
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Candidate-penetrative-fracture mapping of the Grand Canyon area, Arizona, from spatial correlation of deep geophysical features and surficial lineaments
Includes a wide variety of geological and geophysical data: geologic, aeromagnetic, and gravity maps with SLAR, DEM, TM, and NDVI imagery. |
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Clayton Valley Geophysical Data Release
Reprocessed existing gravity data compiled from multiple sources, as well as newly collected gravity and ground magnetic data, and bulk densities and magnetic susceptibilities from outcrop, hand samples, and drill cores. Data are provided in CSV format. |
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Constraining the location of the Archean--Proterozoic suture in the Great Basin based on magnetotelluric soundings
A regional profile on the Utah-Nevada State line reveals a deeply penetrating, broad electrical conductor suggesting the southwestern limit of intact Archean crust is farther north than previously reported with implications for future mineral exploration. |
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Contributions to the gold metallogeny of northern Nevada
Nevada is one of the Earth's premier gold producing regions, accounting for approximately 64 percent of the U.S and nine percent of the world total. The impact of these mines on nearby local economies and on our national balance of payments is profound, a |
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Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models
Regional grid files and 3D voxel models were used to study crustal architecture. Includes grid files consist of surface grids used in the inversions, and calculated geophysical data grids produced by the inversions. Data are provided in GOCAD voxel and GXF grid formats. |
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Digital geologic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California, revision 4
GIS data for geologic units and structural features, with aeromagnetic and gravity maps in PDF |
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Digitized data from ground geophysical surveys in Afghanistan
Surveys originally carried out by Soviet geophysicists from 1972 through 1974 were digitized. Georeferencing was problematic as were some of the measured characteristics; we explain what we did and how we have understood these data. |
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Geologic and geophysical framework of the Santa Rosa 7.5' quadrangle, Sonoma county, California
Geologic units, structural features, magnetic and gravity anomaly contours and radiometric ages of this area |
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Geology of Puerto Rico
Geologic units and faults from USGS Open File Report 98-38, concerning assessment of the mineral resources of Puerto Rico |
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Geology, geochemistry, and genesis of the Greens Creek massive sulfide deposit, Admiralty Island, southeastern Alaska
This metal ore deposit formed over a period of time in which its tectonic setting was changing, consequently it shows a range of characteristics typical of several different types of deposits. Rock geochemistry data are provided in tabular form. |
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Geology, geochemistry, geophysics, mineral occurrences, and mineral resource assessment for the commonwealth of Puerto Rico
Geologic map with faults, along with additional scientific information needed for mineral resource assessment (geochemical analyses, mineral occurrences, geologic terranes, and estimated undiscovered resources) |
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Geophysical Characterization of Subsurface Properties Relevant to the Hydrology of the Standard Mine in Elk Basin, Colorado
To help understand the hydrogeologic controls in the basin and how they affect surface and groundwater interactions with nearby mine workings, electrical resistivity profile, self–potential, and magnetic measurement data are provided herein. |
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Geophysical data from the Spring and Snake Valleys area, Nevada and Utah
Existing and new gravity station data and magnetometer measurements used to infer geologic structure of this area |
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Geophysical interpretations of the southern Española Basin, New Mexico, that contribute to understanding its hydrogeologic framework
Geophysical interpretation of the southern Española basin for the purpose of understanding the hydrogeologic framework including shallow faults, igneous units, and basement rocks |
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Geophysical investigations of the Smoke Creek Desert and their geologic implications, northwest Nevada and northeast California
Gravity and aeromagnetic data analysis described in a report, with a few physical property analyses |
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Geophysical studies in the vicinity of Blue Mountain and Pumpernickel Valley near Winnemucca, north-central Nevada
Data from more than 660 gravity stations, 100 line-km of truck-towed magnetometer traverses, and 260 physical-property sites in this area. |
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Geophysical studies in the vicinity of the Warner Mountains and Surprise Valley, northeast California, northwest Nevada, and southern Oregon
Gravity station data and physical property measurements used to infer subsurface geologic structure |
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Geophysical studies of the Crump Geyser known geothermal resource area, Oregon, in 1975
Gravity map and data used to infer details of the geologic structure of the area. Surveys were conducted during or prior to 1975. |
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Geophysical terranes of the Great Basin and parts of surrounding provinces
A set of geophysical maps with anomalies that are labeled and keyed to tables containing information on each anomaly and its source. |
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Great Basin geoscience data base
A collection of geoscientific data for this area, provided in the mid-1990s using file formats in common use at that time, which are now obsolete. Much of the data is now available in formats more convenient to users of the 2020s at mrdata.usgs.gov. |
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Guide to geophysical data for the northern Rocky Mountains and adjacent areas, Idaho, Montana, Washington, Oregon, and Wyoming
Mathematical analysis of gravity and aeromagnetic data, with basic and derived grids and vector data and maps. |
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Integrated investigations of environmental effects of historical mining in the Animas River watershed, San Juan county, Colorado
Major assessment of the environmental effects of historical mining in the Animas River watershed with GIS data files, tables, and plates. |
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Magnetotelluric data across the Southern San Andreas Fault Zone, California
Magnetotelluric soundings collected in 2019 to help inform depth-dependent fault zone geometry, fluid content and porosity in this part of the fault zone. Data are provided in MTH5 format. |
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Magnetotelluric data collected to characterize aquifers in the San Luis Basin, New Mexico
The purpose of this report is to release one north-south and two east-west regional magnetotelluric sounding profiles collected where drillhole data are sparse. No interpretation of the data is included. |
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Magnetotelluric data from Minnesota, Wisconsin, and Upper Michigan, 2015-2019
Magnetotelluric stations collected from 2015-2019 across parts of Minnesota, Wisconsin and the Upper Peninsula of Michigan to support regional investigations into the geologic and tectonic framework of the area and to support mineral resource investigations. |
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Magnetotelluric data from Missouri, Arkansas, Tennessee, Illinois, and Kentucky, 2016-2019
Magnetotelluric station data collected from 2016-2019 across parts of Missouri, Arkansas, Tennessee, Illinois, and Kentucky to support regional investigations into the geologic and tectonic framework of the area and mineral resource and geologic hazard investigations. |
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Magnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018
Magnetotelluric sounding data collected in July 2018 in the Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field to understand the geologic structure of this area. |
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Magnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2019
Magnetotelluric station locations and data intended to help to characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and also to improve knowledge of deep geologic structures that may have been conduits for hydrothermal fluids that formed mineral deposits. |
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Magnetotelluric sounding data, stations 1 to 12, East-Central Tooele County, Utah, 2003
Magnetotelluric (MT) sounding data collected in 2003 along a north-south profile in this area to learn whether major mining districts in the Northern Nevada Gold Province are underlain by rocks of the Archean Wyoming craton, which are known to contain orogenic gold deposits, or by accreted rocks of the Paleoproterozoic Mojave province. |
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Magnetotelluric sounding data, stations 1 to 22, Southern San Luis Valley, Colorado, 2006
Magnetotelluric sounding data collected in 2006 in this area to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. |
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Magnetotelluric sounding data, stations 1 to 25, north eastern Nevada, 2003
Magnetotelluric sounding data collected in 2003 along a north-south profile west of Wendover, Nevada, to understand the rocks underlying mineral deposits in this area. |
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Magnetotelluric survey to characterize the Sunnyside Porphyry Copper System in the Patagonia Mountains, Arizona
Magnetotelluric sounding data collected in 2008 in this area to help USGS understand concealed mineral resources. |
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National-Scale Geophysical, Geologic, and Mineral Resource Data and Grids for the United States, Canada, and Australia: Data in Support of the Tri-National Critical Minerals Mapping Initiative
National-scale geologic, geophysical, and mineral resource raster and vector data covering the United States, Canada, and Australia. Data are provided in shapefile, CSV, Excel, and GeoTIFF formats. |
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Physical properties by geologic unit in the southern San Luis basin, New Mexico
Rock density and magnetic susceptibility measurements of samples drawn from this area. Data are provided in CSV format. |
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Resource potential and geology of the Grand Mesa, Uncompahgre, and Gunnison (GMUG) National Forests and vicinity, Colorado
Multi-chapter report combining geologic, geochemical, geophysical, and mining activity data. Downloadable data for coal resource information only. |
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Summary of geophysical investigations of the Death Valley regional water-flow modeling project, Nevada and California
Magnetic and gravity anomaly and structure contour data |
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