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Field inventory and monitoring

Repeated observation or sampling at a site, on a scheduled or event basis, for study and analysis. In general, this category excludes sampling programs in which materials are obtained in the field and brought back to a laboratory for study and analysis.
This category is also used for baseline characterization, field monitoring, field observation, inventory, reconnaissance, and river discharge monitoring.


Results listed by similarity [list alphabetically]
Field estimates of gravity terrain corrections and Y2K-compatible method to convert from gravity readings with multiple base stations to tide- and long-term drift-corrected observations

Fortran code to facilitate correction and interpretation of gravity observations

Characterization of major lithologic units underlying the lower American River using water-borne continuous resistivity profiling, Sacramento, California, June 2008

Geophysical study of the sediment under a river intended to help assess the susceptibility of this material to scour and the erosion of levees adjacent to the river.

Principal facts and an approach to collecting gravity data using near-real-time observations in the vicinity of Barstow, California

The purpose of the data collection was to investigate possible changes in gravity across mapped Quaternary faults and to improve regional gravity coverage, adding to the existing national gravity database.

Whole-rock and sulfide-mineral geochemical data for samples from volcanogenic massive sulfide deposits of the Bonnifield district, east-central Alaska

The data consist of major- and trace-element whole-rock geochemical analyses and major- and trace-element analyses of sulfide minerals determined by electron microprobe and laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) techniques

Characterization of Geologic Structures and Host Rock Properties Relevant to the Hydrogeology of the Standard Mine in Elk Basin, Gunnison County, Colorado

Geological and borehole geophysical data and observations collected to characterize the basin and its surface and groundwater flow systems with primary focus on the physical characteristics of the fault vein, related mine workings, and surrounding bedrock

FD_BH: A program for simulating electromagnetic waves from a borehole antenna

Software for simulating electromagnetic waves from a borehole antenna

Field demonstrations of five geophysical methods that could be used to characterize deposits of alluvial aggregate

Data from seismic reflection and refraction, electromagnetic sounding, and resistivity profiling in a study area in Indiana. Exact location is not provided.

Geologic field notes and geochemical analyses of outcrop and drill core from Mesoproterozoic rocks and iron-oxide deposits and prospects of southeast Missouri

Field notes, locations, rock descriptions, and geochemical analyses from a 1988 to 1994 study to facilitate new research efforts in IOCG (iron-oxide deposits in context with other iron oxide-copper ± uranium) deposit types.

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.

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.

Geophysical investigation of Red Devil mine using direct-current resistivity and electromagnetic induction, Red Devil, Alaska, August 2010

This large producer of mercury operated from 1933 to 1971. As part of remediation work, this survey used electromagnetic methods to study subsurface resistivity.

Gravity data from the San Pedro River Basin, Cochise County, Arizona

321 observed gravity values with free-air, simple Bouguer, and complete Bouguer anomaly values; high-precision relative-gravity surveys repeated over time, useful for aquifer-storage-change monitoring; and absolute gravity values for use as base stations.

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.

Introduction to potential fields: gravity

Explanation of the Earth's gravitational field, emphasizing how USGS scientists measure gravity and portray these measurements on maps. Explains terminology of gravity anomaly maps and their relationship to the rock types and other geologic features.

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.

Pick_Sw: A program for interactive picking of S-wave data, version 2.00

Software for interactively picking of S-wave data

Preliminary isostatic gravity map of the Sonoma Volcanic field and vicinity, Sonoma and Napa counties, California

Gravity station data from three separate surveys

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

Principal facts for gravity stations and physical property measurements in the Lake Mead 30x60 minute quadrangle, Nevada and Arizona

Gravity data were collected in support of geologic mapping of the quadrangle. In addition, older gravity data were reprocessed for consistency and included, as well as 250 measurements of density and magnetic susceptibility.

Results of gravity fieldwork conducted in March 2008 in the Moapa Valley region of Clark County, Nevada

Study aids understanding of local geologic structure and ground-water flow, includes principal facts for 266 gravity stations and physical properties of representative rock samples.

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.

Transient electromagnetic soundings near Great Sand Dunes National Park and Preserve, San Luis Valley, Colorado (2006 field season)

Geophysical surveying data used to infer subsurface configuration of impermeable layers in this Pliocene-Pleistocene lake bed.

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

A summary of data collected by the U.S. Geological Survey at Dasht-e-Nawar, Afghanistan, in support of lithium exploration, June-September 2014

USGS collaboration included providing analysis of Landsat imagery; gravity measurements of sediment and rock samples; oversight of passive seismic data collection and subsequent analysis; and analysis of the chemistry and mineralogy of subsurface samples.

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

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.

Aeromagnetic and gravity surveys in Afghanistan

Collection of historical gravity and aeromagnetic data in Afghanistan (1911 through 1967)

Aeromagnetic data centered over Skelton Neve, Antarctica

Gridded aeromagnetic and ground-based gravity station data

Aeromagnetic survey in Afghanistan

Digital files and descriptions of airborne and ground collected magnetic data in Afghanistan

Aeromagnetic surveys in Yukon Flats Alaska

Flight-line data from the aeromagnetic survey

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.

Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010

Study to estimate the 3-D distribution of permafrost, to evaluate the effectiveness of these methods at mapping permafrost geometry, and to better define the physical properties of the subsurface in discontinuous permafrost areas.

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.

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.

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.

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.

Airborne gravity survey and ground gravity in Afghanistan

Data release and processing description of airborne and ground gravity data collected over Afghanistan

An interpretation of the 1997 airborne electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona

Grids and flight-line magnetic and conductivity data

Application of ground penetrating radar to estimate sand and gravel resources near Bow, southern New Hampshire

Includes application-specific radar data files.

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.

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.

Audio-magnetotelluric data from the Culpeper basin, Loudoun, Fauquier, Fairfax, Prince William, Culpeper, and Orange counties, Virginia

Bouguer gravity anomaly grid for the conterminous US

Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. This digital grid describes the Bouguer gravity anomaly for the conterminous US.

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.

check_picks_x: A program for checking the travel time picks of crosswell seismic and radar data

Software for checking the travel time picks of crosswell seismic and radar data

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.

Compilation of Alaska gravity data and historical reports

Gravity measured from 1958-2005, with standard gravity reduction calculations applied to correct for latitude, elevation, topography, and isostasy.

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.

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.

Cretaceous magmatic rocks of Alaska

Data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier, published (at 1:2,500,000 scale) in volume G-1 of "The Geology of Alaska" (GSA)

Depositional Setting and Geochemistry of Phosphorites and Metalliferous Black Shales in the Carboniferous-Permian Lisburne Group, Northern Alaska

The purpose of this paper is to present new sedimentological, paleontological, and geochemical data that allow us to define the geographic and stratigraphic extent and depositional setting of these temporally unusual phosphorites.

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

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

Digital tabulation of stratigraphic data from oil and gas wells in the Santa Maria Basin and surrounding areas, central California coast

This report makes available a large well dataset so that subsurface stratigraphic data are available in digital form for use within a GIS and in construction of three-dimensional models to address regional stratigraphic and structural questions.

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.

Distribution of Potential Hydrothermally Altered Rocks in Central Colorado Derived From Landsat Thematic Mapper Data: A Geographic Information System Data Set

As part of a mineral resource assessment, imagery data were used to help target areas where exposed rocks might be hydrothermally altered, providing an indication of the location of potentially mineralized areas that may contain mineral deposits.

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.

Geology of the conterminous United States

A digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b). It excludes Alaska and Hawaii.

Geology, geochemistry, and geophysics of the Fry Canyon uranium/copper project site, southeastern Utah - Indications of contaminant migration

Chemical analyses of water and sediment samples, images depicting resistivity.

Geophysical and geochemical data from the area of the Pebble Cu-Au-Mo porphyry deposit, southwestern Alaska: Contributions to assessment techniques for concealed mineral resources

Uninterpreted geophysical measurements and geochemical and mineralogical analytical data from samples collected during the summer field seasons from 2007 to 2010. Data are available in a single Geographic Information System (GIS) database.

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

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

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

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.

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

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.

Geophysical surveys of Bear Lake, Utah-Idaho, September, 2002

Detailed bathymetry, lake-floor acoustic imaging, and sample characteristics to infer bottom sediment characteristics.

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.

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

Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California

Report with gravity station data in a spreadsheet

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.

Gravity and magnetic investigations of the Mojave National Preserve and adjacent areas, California and Nevada

Gravity station and rock physical property data used to infer geologic structure of the area

Gravity and magnetic studies of the eastern Mojave Desert, California and Nevada

Report with generalized interpretation and Excel tables of gravity and physical property data including an explanations of their formats.

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

Gravity data along LARSE (Los Angeles Regional Seismic Experiment) line 2, southern California

Data taken across the San Fernando Basin and Transverse Ranges to help characterize the structure underlying this area

Gravity data from Dry Lake and Delamar Valleys, east-central Nevada

Principal facts (gravity observations) for 185 new stations

Gravity data from Newark Valley, White Pine county, Nevada

Gravity station data, isostatic anomaly map, and depth to basement map derived from geophysical inverse modeling.

Gravity investigations of the Chickasaw National Recreation Area, south-central Oklahoma

Gravity anomaly with physical property measurements in support of structural geologic investigation

Gravity map and data of the eastern half of the Big Bear Lake, 100,000 scale quadrangle, California, and analysis of the depths of several basins

Data on the southern portion of the Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms and the Yucca Valley-Joshua Tree-Twentynine Palms area and presents the map and basin analyses.

Gravity map of Nevada

Gravity observations throughout Nevada combined to provide a consistent collection of point measurements and generate maps.

Gravity studies of Cave, Dry Lake, and Delamar Valleys, East-Central Nevada

Gravity surveys and structural interpretation of anomaly data in support of ground-water studies

Gravity study of the Guernsey landfill site, Guernsey, Wyoming

Gravity measurements and surveyed topography data

Gravity survey and interpretation of Fort Irwin and vicinity, Mojave Desert, California

Provides a view of alluvial basins, shapes, areal extents, and approximate thicknesses of alluvial fill. Gravity field is separated into density variations in the basement complex and distribution of Cenozoic fill with its 3-D thickness representation.

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

Ground geophysical study of the Buckeye Mine Tailings, Boulder watershed, Montana

Electromagnetic, resistivity, and magnetic surveys used to determine the extent of contamination in an abandoned mine area.

Ground magnetic data from within the Long Valley Caldera, California

Results of a detailed ground magnetic survey

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.

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.

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.

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.

Helicopter electromagnetic and magnetic geophysical survey data, portions of the North Platte and South Platte Natural Resource Districts, western Nebraska, May 2009

Geophysical surveys to map shallow hydrogeologic features of the southwestern part of the Sand Hills that contain a mix of fresh to saline lakes.

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.

Helicopter electromagnetic and magnetic survey data and maps, northern Bexar County, Texas

Grids, images, and flight-line paths for magnetic and resistivity surveys

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.

Helicopter electromagnetic data from Everglades National Park and surrounding areas, Florida, collected 9-14 December 1994

Survey to determine location of the freshwater-saltwater boundary in a coastal area.

High resolution, low altitude aeromagnetic and electromagnetic survey of Mount Rainier

Flight-line and gridded data, with description of methodology and interpretation

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.

High-resolution gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California

These data were acquired to determine the thickness of valley-fill deposits and to delineate geologic structures that might influence groundwater flow beneath this area.

Identification of mineral resources in Afghanistan-Detecting and mapping resource anomalies in prioritized areas using geophysical and remote sensing (ASTER and HyMap) data

Using geophysical and remote-sensing data, previously unrecognized targets of potential mineralization were identified; this report shows those targets along with the evidence for their potential.

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.

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.

Isostatic gravity map of the Las Vegas 30'x60' quadrangle, California and Nevada

Includes principal facts (gravity observations) for 2,506 stations.

Isostatic gravity map of the Monterey 30x60 minute quadrangle and adjacent areas, California

Gravity measurements to support regional mapping and hydrologic studies

Isostatic gravity map of the Point Sur 30 x 60 quadrangle and adjacent areas, California

Includes 802 gravity station measurements with isostatic, free-air, simple and complete Bouguer anomalies, and terrain correction.

Isostatic gravity map with geology of the Santa Ana 30'x60' quadrangle, southern California

Contour map of isostatic gravity anomaly with bedrock geology, and principal facts for the gravity stations as a separate data file.

Isostatic gravity map with simplified geology of the Los Angeles 30x60 minute Quadrangle

Includes detailed point measurements of gravity

Isostatic residual gravity anomaly grid for the conterminous US

Measurements of the gravitational field vary slightly from place to place due to the composition and structure of Earth's crust. This digital grid describes the isostatic residual gravity anomaly for the conterminous US.

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.

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.

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.

Magnetic properties of Quaternary deposits, Kenai Peninsula, Alaska -- Implications for aeromagnetic anomalies of Upper Cook Inlet

Magnetic susceptibility measurements with statistical analysis

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.

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.

Major- and trace-element concentrations in soils from two continental-scale transects of the United States and Canada

Spreadsheets containing geochemical data for soils

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.

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.

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.

National geophysical data grids; gamma-ray, gravity, magnetic, and topographic data for the conterminous United States

Gridded geophysical data in a variety of formats.

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.

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.

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.

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.

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.

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.

Ohio complete bouguer gravity anomaly grid

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.

Pan-American Center for Earth and Environmental Studies (PACES) gravity data portal

Terrain-corrected US gravity station data using NAD83 and NGVD88 downloadable from a map interface.

pick_xwell: A program for interactive picking of crosswell seismic and radar data

Software for interactively picking crosswell seismic and radar data

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.

Preliminary isostatic gravity map of Joshua Tree National Park and vicinity, southern California

Map with excel tables showing principal facts (gravity observation data).

Preliminary isostatic residual gravity anomaly map of Paso Robles 30 x 60 minute quadrangle, California

Includes 2,604 (170 not previously published) gravity station measurements with calculations of free-air, simple Bouguer, complete Bouguer, and isostatic anomaly.

Principal facts for 408 gravity stations in the vicinity of the Talkeetna Mountains, south-central Alaska

Data collected as part of a geological and geophysical framework study

Principal facts for 463 gravity stations in the vicinity of Tangle Lakes, east-central Alaska

New gravity stations combined here with older measurements taken by other USGS survey trips

Principal facts for gravity data along the Hayward fault and vicinity, San Francisco Bay area, northern California

Data and associated physical property measurements were collected as part of on-going studies to help determine the earthquake hazard potential of major faults within the San Francisco Bay region

Principal facts for gravity data collected in South Dakota

Gravity anomaly measurements throughout the state

Principal facts for gravity data collected in the southern Albuquerque Basin area and a regional compilation, central New Mexico

New data incorporated with existing data complete overall coverage of the basin, one of the largest associated with the Rio Grande rift.

Principal facts for gravity data collected in Wisconsin

Gravity anomaly surveys of Wisconsin, both separately by survey and combined.

Principal facts for gravity profiles collected near the Osgood Mountains and the Slumbering Hills, north-central Nevada

Gravity station data for several surveys of this area.

Principal facts for gravity stations collected in 2010 from White Pine and Lincoln Counties, east-central Nevada

Gravity observations from 99 locations in this area, with free-air, isostatic, and complete Bouguer anomalies.

Principal facts for gravity stations in the Antelope Valley-Bedell Flat area, west-central Nevada

Physical property data for selected rock samples accompany these gravity observations

Principal facts for gravity stations in the Dry Valley area, West-Central Nevada and east-central California

Gravity measurements used for determining geologic structure to aid in understanding ground-water flow

Principal facts for gravity stations in the vicinity of Coyote Spring valley, Nevada, with initial gravity modeling results

Gravity study to help define the shapes of young basins filled with Cenozoic rocks and alluvium, and to identify any possible faults within these basins that might influence the movement of groundwater.

Principal facts for gravity stations in the vicinity of San Bernardino, southern California

Gravity measurements collected to help define the characteristics of the Rialto-Colton fault, with rock properties such as lithology, magnetic susceptibility and density.

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.

Results of electrical resistivity data collected near the town of Guernsey, Platte county, Wyoming

A study to investigate subsurface geologic conditions as they relate to ground-water flow in an abandoned landfill.

Schlumberger DC resistivity soundings in the Boulder watershed, Jefferson and Lewis and Clark counties, Montana

DC resistivity soundings were made to map subsurface lithologic, structural and hydrologic features important in controlling possible ground water contamination from mining activities and for design of remediation efforts.

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.

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.

Summary of geophysical investigations of the Death Valley regional water-flow modeling project, Nevada and California

Magnetic and gravity anomaly and structure contour data

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.

Three-dimensional geologic model of complex fault structures in the upper Seco Creek area, Medina and Uvalde counties, south-central Texas

Data sets include drill-hole from core and geophysical logs, surface geology and elevation, and helicopter electromagnetic survey data. The model may be explored and .jpg or .tiff images or using specialized software provided.

Time-domain electromagnetic soundings near Antioch, Illinois,and Berrien Springs, Michigan

Study to help constrain 3-dimensional geologic maps of surficial materials in these glacial deposits

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.

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.

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.

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.

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.

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.

xwell_radar: A program for calculating crosswell radar traces for layered media

Computer program for calculating crosswell radar traces for layered media