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 survey in Afghanistan
Digital files and descriptions of airborne and ground collected magnetic data in Afghanistan |
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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 in Big Cypress National Preserve and Everglades National Park, 2001
Airborne electromagnetic (AEM) and magnetic survey data, a total of 3065 line-kilometers, collected during October 2001 with line spacing 400m and nominal altitude of 30m. Includes raw and processed AEM data and magnetic data, in CSV format. |
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Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana
Airborne electromagnetic and magnetic survey data were collected in 2014 in this area. The survey was flown at a nominal flight height of 30 m above terrain, line spacing of 200 m with a smaller area at 100 m. Includes raw and processed AEM data and spatially-constrained inverted resistivity depth sections, and unprocessed and processed magnetic data that has been drift corrected, leveled, and draped to terrain. 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 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 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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Concepts and procedures required for successful reduction of tensor magnetic gradiometer data obtained from an unexploded ordnance detection demonstration at Yuma Proving Grounds, Arizona
Report discussing application of specialized instrumentation for detecting unexploded ordnance. |
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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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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 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 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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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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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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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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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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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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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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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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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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Magnetotelluric sounding data, stations 26 to 36, north of Wells, Nevada, 2005
Magnetotelluric (MT) sounding data collected in 2005 along an east-west profile in this area, to know 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 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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