Geophysical Site Characterization of Bay Area Seismic Monitoring Stations: Vs-depth Profiling, NEHRP Site Classifications, and Linear Shallow Seismic Amplification Functions

New active-source shallow seismic (shear-wave and acoustic-wave) measurements were obtained at 18 prioritized seismic monitoring station locations in the north San Francisco Bay area to measure site-specific ground motion amplification effects, soil depth, depth to bedrock (Z1.0 Vs=1 km/s), calculate site specific velocity-depth profiles and Vs30, and develop NEHRP site classifications for each location. This study was led by Principal Investigators Jamey Turner, Cooper Brossy, and Daniel O’Connell and field data were acquired by Glendon Adams and Lincoln Steele. Seismic monitoring sites that recorded high PGA values during the M6.0 Napa earthquake, proximal to higher population densities, and sites recommended...

Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, EHP, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, All tags... NEHRP, Napa, National Earthquake Hazards Reduction Program, PGA, PGV, San Francisco Bay, USGS, United States, earth science, earthquake hazard, geophysical survey, geophysics, peak ground acceleration, peak ground velocity, seismic hazards, seismic monitoring, seismic velocity, seismology, shear wave velocity, tectonophysics, Fewer tags

Geophysical Surveys at Lake Poinsett Dam, Poinsett County, Arkansas

Lake Poinsett is a 260-hectare (640 acres) lake located on Crowley’s Ridge in northeastern Arkansas, approximately 6 km southeast of Harrisburg, Arkansas within Poinsett County. The lake was built for recreation by the Arkansas Highway Department in 1960 by constructing a roughly 800-meter dam across the southern boundary of the Distress Creek watershed. The dam is currently operated by the Arkansas Game and Fish Commission (AGFC). AGFC and Arkansas Natural Resources Commission (ANRC) plan to drain the lake to allow access for a series of bank stabilization and dam safety improvements. Because none of the original blueprints exist, AGFC asked the U.S. Geological Survey (USGS) to conduct a series of differential...

Categories: Data; Tags: Arkansas, Crowley's Ridge, Electrical Resistivity, Frequency Domain Electromagnetics, GNSS Survey, All tags... Geophysical Survey, Geophysics, Hydrogeology, Lake Poinsett, Lake Poinsett State Park, Poinsett County, Self Potential, USGS Science Data Catalog (SDC), Water Resources, inlandWaters, structure, Fewer tags

Eagle Airborne Magnetic and Radiometric Geophysical Survey

The Eagle airborne magnetic and radiometric geophysical survey covers parts of the Charley River, Eagle, and Tanacross quadrangles near Eagle, Alaska (fig. 1). Magnetic and radiometric data were collected with a fixed-wing aircraft May 24 to June 27, 2021 by MPX Geophysics LTD. A total of 26,926 line kilometers were collected covering 9,731 square kilometers. The magnetometer was mounted to a rear-facing fixed boom (tail stinger). The radiometric crystals were located in the cabin of the aircraft. The Eagle survey was flown with a line spacing of 400 meters (m) and a mean ground clearance of 330 m. The data, as well as additional metadata, are available from the DGGS website: https://doi.org/10.14509/30755. USGS...

Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Alder Creek, Alma Creek, American Creek, Anaconda Creek, Analytic Signal, Arctic Creek, Arctic Dome, Arkansas Creek, Aurora Creek, Barney Creek, Bear Creek, Ben Creek, Black Diamond Creek, Bluff Creek, Bonanza Creek, Boulder Creek, Boundary Creek, Bow Creek, Broken Neck Creek, Bryan Creek, Bryant Creek, Buck Creek, Buckeye Creeek, Buckeye Creek, Buckskin Creek, Bullion Creek, Butte Creek, Calico Bluff, Canyon Creek, Caribou Creek, Cassiar Creek, Castalia Creek, Cedar Creek, Champion Creek, Chicago Boy Creek, Clifford Creek, Colorado Creek, Columbia Creek, Comet Creek, Confederate Creek, Copper Creek, Crab Creek, Cripple Creek, Crooked Creek, Crowley Creek, Curtis Bar Creek, DGGS, Deadman Island, Deep Creek, Deer Creek, Dewey Creek, Diamond Fork, Dick Dale Creek, Dime Creek, Discovery Creek, Discovery Fork, Dome Creek, Dominion Creek, Eagle, Eagle Bluff, Eagle Creek, Easter Creek, Eldorado Creek, Enterprise Creek, Eva Creek, Excelsior Creek, Exploration, Fish Creek, Flat Creek, Flume Creek, Ford Lake, Fortymile Dome, Fortymile River, Fox Creek, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Georgie Creek, Gillman Creek, Glacier Mountain, Glenn Creek, Gold Bottom Creek, Gold Creek, Granite Creek, Green Creek, Gridded Data, Happy New Year Creek, Hilda Creek, Hutchinson Creek, Independence Creek, Iron Creek, Jim Creek, John Shedd Creek, Joseph, Joseph Creek, Kechumstuk Creek, King Creek, King Solomon Creek, Last Chance Creek, Line Data, Logan Creek, Lost Creek, Lousy Creek, Magnetic Data, Magnetic Survey, Magnetics, Manila Creek, Mariner Creek, Marion Creek, Merry Christmas Creek, Michigan Creek, Mineral Resources, Mission Creek, Missoula Creek, Mogul Creek, Molly Creek, Montana Creek, Moose Creek, Mosquito Fork, Mount Eldridge, Mount Harper, Mount Veta, Mount Warbelow, My Creek, North Peak, Norvell Creek, Nugget Creek, Ole Creek, Oregon Creek, Our Creek, Pennsylvania Creek, Phoenix Creek, Pittsburgh Creek, Placer Creek, Polly Creek, Portage Creek, Powee Creek, Quartz Creek, Queen of Sheba Creek, Remote Sensing, Rock Creek, Ruby Creek, Sam Patch Creek, Seventymile, Seventymile River, Seward Creek, Shade Creek, Sheba Mountain, Silver Bow Creek, Sinnott Creek, Slate Creek, Smith Creek, Snow Creek, Sonickson Creek, South Boundary Creek, Steele Creek, Strawberry Dome, Surprise Creek, Telegraph Creek, Thurston Creek, Trail Creek, Twin Creek, USGS Science Data Catalog (SDC), Union Creek, Utah Creek, Van Milligan Creek, Veta Creek, Wallcutt Mountain, Washington Creek, Willow Creek, Wilson Creek, Wolf Creek, Yukon River, Yukon-Tanana Upland, geoscientificInformation, Fewer tags

Seward Peninsula Airborne Electromagnetic Survey, Kigluiak, Bendeleben, and Darby Mountains

Seward Peninsula airborne electromagnetic survey, Kigluiak, Bendeleben, and Darby Mountains, Geophysical Report 2024-2, covers parts of the Teller, Bendeleben, Nome, and Solomon 1:250,000-scale U.S. Geological Survey (USGS) quadrangles on the Seward Peninsula north of Nome, Alaska. Time-domain electromagnetic data were collected with the SkyTEM 306HP system, which was towed by a helicopter, from September 8 to October 3, 2023, and from June 5 to July 18, 2024. A total of 4,330-line kilometers (km) were collected covering 4,817 km2. The survey was flown with semi-parallel lines spaced approximately 1 km apart and oriented perpendicular to regional geologic strike. Electromagnetic data were used to create resistivity...

Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Analytic Signal, Bendeleben Mountains, Bunker Hill, Central River, Chauik Mountain, Cobblestone River, Copper Mountain, Council Mining District, Crater Lake, DGGS, Darby Mountains, Exploration, Feather River, Fish River, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Grand Central River, Grand Singatook, Grass Valley, Gridded Data, Imuruk Basin, Kigluaik Mountains, Kougarok Mining District, Kougarok River, Koyuk Mining District, Kuzitrin Lake, Kuzitrin River, Libby River, Line Data, Magnetic Data, Magnetic Survey, Magnetics, Mineral Resources, Mosquito Pass, Mount Bendeleben, Mount Osborn, Mount Ost, Niukluk River, Nome Mining District, Nome River, Omiaktalik Lake, Omilak, Omilak Mountain, Pargon River, Pilgrim River, Pilgrim Springs, Port Clarence Mining District, Remote Sensing, Salmon Lake, Seward Peninsula, Sinuk, Sinuk River, Tigaraha Mountain, Tisuk River, Tubutulik River, USGS Science Data Catalog (SDC), White River, Wild Goose Pipeline, geoscientificInformation, Fewer tags

Continuous resistivity profiling, direct current resistivity, and frequency domain electromagnetic data for the Dolores River, Paradox Valley, Colorado, 2017

This data release includes raw and processed (inverted) data for three different geophysical methods, continuous resistivity profiles (CRP), direct current electrical resistivity tomography (ERT), and frequency domain electromagnetic induction (FDEM) data. These surface geophysical methods were used as a proxy for groundwater salinity in the Paradox Valley in western Colorado to investigate temporal and spatial variations in the position of brine-rich groundwater under the Dolores River. Continuous resistivity profile surveys along a 8-10 km reach of the Dolores River were conducted on March 7, May 16, and September 13 of 2017. The ERT surveys were conducted along 3 lines crossing the river and 1 line parallel to...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bedrock, Colorado, Dolores River, Montrose County, Paradox Valley, USGS Science Data Catalog (SDC), All tags... brine-rich groundwater, continuous resistivity profiling, geophysical survey, geoscientificInformation, Fewer tags

Fortymile mining district electromagnetic and magnetic airborne geophysical survey, data compilation

The Fortymile electromagnetic and magnetic airborne geophysical survey data were acquired with a DIGHEM-V Electromagnetic (EM) system and a cesium magnetometer. The EM and magnetic sensors were flown at a height of 30 meters (m). In addition the survey recorded data from radar and laser altimeters, a GPS navigation system, 50/60 Hz monitors and a video camera. Flights were performed with an AS-350-B2 Squirrel helicopter at a mean terrain clearance of 60 m along N-S survey flight lines with a spacing of 400 m. Tie lines were flown perpendicular to the flight lines at intervals of approximately 4,800 m

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Analytic Signal, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, DIGHEM-V EM System, Eagle Quadrangle, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, First Vertical Derivative, Fortymile Mining District, Fortymile River, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Gridded Data, HEM Survey, HFEM Survey, Kyanite, Line Data, Magnetic Contours, Magnetic Data, Magnetic Survey, Magnetics, Metamorphic Rocks, Mining, Raster Image, Resistivity, Tanacross Quadrangle, Taylor Highway, Top of the World Highway, geoscientificInformation, Fewer tags

Airborne magnetic geophysical survey of the Tanacross region, Alaska

Airborne geophysical data for the Tanacross area were acquired and processed by Goldak Airborne Surveys under contract with the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS). Project funded by the US Geological Survey, Mineral Resources Program. This high sensitivity aeromagnetic survey was carried out by Goldak Airborne Surveys (Goldak) on behalf of the Alaska Department of Geological and Geophysical Surveys (DGGS) between June 17th and July 31st, 2015. Aircraft equipment operated included three cesium vapor magnetometers, a GPS/GLONASS real-time and post-corrected differential positioning system, a flight path recovery camera, a digital video titling and...

Tags: Big Delta Quadrangle, Bush Prospect, Dennis Ladue Prospect, Dennison Fork, Diamond Mountain, All tags... Eagle Quadrangle, Fish Prospect, Fortymile Mining District, Fortymile River, Friden Prospect, Geophysical Survey, Geophysics, Geophysics Search Tag, Goodpaster Mining District, Hajdukovich Molybdenum? Prospect, J-26 Prospect, July 26 Prospect, June 26 Prospect, Kechumstuck Mountain, Ketchumstuk Prospect, LWM Occurrence, Ladue River, Little Enchilada Prospect, Little Whiteman Creek Prospect, Magnetic Data, Magnetic Survey, Magnetics, McArthur Creek, Middle Fork Fortymile River, Mitchell Prospect, Mosquito Flats, Mosquito Fork, Mosquito Prospect, Mount Fairplay, Mount Harper, Mount Hayes Quadrangle, Move Prospect, Mt. Fairplay Prospect, Nabesna Quadrangle, North Mosquito Flats Prospect, North Peternie Prospect, Peternie Prospect, Prindle Volcano, Rainy Mountain Lode Prospect, Raven Prospect, Section 21 Prospect, Shady Ridge Prospect, Sheba Mountain, Silver Lining Prospect, Sixtymile Butte, Sixtymile Butte Prospect, South Fork of the Fortymile River, Tanacross Quadrangle, Taurus Prospect, Taylor Highway, Taylor Mountain, VABM West Prospect, VW Prospect, geoscientificInformation, Fewer tags

Livengood mining district electromagnetic and magnetic airborne geophysical survey, data compilation

The Livengood electromagnetic and magnetic airborne geophysical survey data were acquired with a DIGHEM-V Electromagnetic (EM) system and a cesium magnetometer. The EM and magnetic sensors were flown at a height of 30 meters (m). In addition the survey recorded data from radar and laser altimeters, a GPS navigation system, 50/60 Hz monitors and a video camera. Flights were performed with an AS-350-B2 Squirrel helicopter at a mean terrain clearance of 60 m along N-S survey flight lines with a spacing of 400 m. Tie lines were flown perpendicular to the flight lines at intervals of approximately 4,800 m

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Airborne Geophysical Survey, Analytic Signal, All tags... Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, DIGHEM-V EM System, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, First Vertical Derivative, Fortymile Mining District, Fortymile River, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Gridded Data, HEM Survey, HFEM Survey, Line Data, Livengood Bench, Livengood Mining District, Livengood Quadrangle, Magnetic Contours, Magnetic Data, Magnetic Survey, Magnetics, Money Knob, Raster Image, Resistivity, Shorty Creek, Tolovana Mining District, geoscientificInformation, Fewer tags

Liberty Bell area, western Bonnifield mining district, electromagnetic and magnetic airborne geophysical survey, data compilation

This publication, GPR 2017-1, provides geophysical data produced from an airborne geophysical survey conducted in 2001 and released in 2002 for 276 sq miles of the Liberty Bell area, western Bonnifield mining district, central Alaska. Aeromagnetic and electromagnetic data were acquired during the survey. During 2016, the same digital data were reformatted for ease of use with modern processing tools; vector shapefiles and the analytic signal and calculated first vertical derivative grids were added. Other than the creation of calculated grids, no new processing was done. Data provided in GPR 2017-1 include processed (1) linedata ASCII databases, (2) gridded files of magnetic and resistivity data, (3) vector files...

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Alaska, State of, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, Bonanza Creek, Bonnifield Mining District, Buzzard Creek, California Creek, Chicken Creek, Coal Creek, Cody Creek, DIGHEM-V EM System, Daniels Creek, Digital Elevation Model, Eagle Creek, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, Elsie Creek, Emma Creek, Eva Creek, Fairbanks Quadrangle, First Vertical Derivative, Fourth of July Creek, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Homestake Creek, Iron Creek, Liberty Bell Mine, Little Moose Creek, Lynx Creek, Magnetics, Marguerite Creek, McAdam Creek, Resistivity, Resistivity Survey, Rex Creek, Rex Dome, Saint Charles Creek, Spruce Creek, Steep Creek, Wilson Creek, Winter Creek, geoscientificInformation, Fewer tags

Sub-regional, merged, gridded airborne geophysical data

Merged grids of residual magnetic intensity, digital terrain model, and apparent resistivity compiled from the Black Mountain, Liscum, Goodpaster, SE extension of Salcha River - Pogo, and Salcha River Pogo geophysical surveys.

Tags: Airborne Geophysical Survey, Alaska, State of, Electromagnetic Data, Electromagnetic Survey, Geophysical Map, All tags... Geophysical Survey, Geophysics, Geophysics Search Tag, Gridded Data, Magnetic Data, Magnetic Survey, Magnetics, geoscientificInformation, Fewer tags

Surface Geophysical Data Used for Mapping the Top of the Dockum Group on Cannon Air Force Base in Curry County, New Mexico, 2020

The hydrogeology of the Cannon Air Force Base (AFB) in Curry County, is being investigated to better understand the mechanics of groundwater flow in the area, including the identification of preferential groundwater flow paths. Mapping the top of the Dockum Group was done to help identify potential paleochannels that may have eroded the surface of the Dockum Group and subsequently filled in with coarse-grained sediments of the overlying Ogallala Formation. The Dockum Group is composed of sandstone, siltstone, mudstone, and shale that were originally deposited in fluvial and lacustrine environments (McGowen and others, 1979). The upper part of the Dockum Group is a thick layer of red clay referred to locally as the...

Tags: Cannon Air Force Base, Curry County, Dockum Group, Electrical Resistivity Tomography, Electromagnetic, All tags... Geologic, Geophysical Survey, Groundwater, Hydrogeologic, New Mexico, Ogallala Group, Resistivity, Time-domain, USGS Science Data Catalog (SDC), Fewer tags

Sub-regional, merged, gridded airborne geophysical data

Merged grids of residual magnetic intensity, digital terrain model, and apparent resistivity compiled from the Tanacross, Ladue, Western Fortymile, and Fortymile geophysical surveys.

Tags: Airborne Geophysical Survey, Alaska, State of, Electromagnetic Data, Electromagnetic Survey, Geophysical Map, All tags... Geophysical Survey, Geophysics, Geophysics Search Tag, Gridded Data, Magnetic Data, Magnetic Survey, Magnetics, geoscientificInformation, Fewer tags

Geophysical surveys and geospatial data for Bob Kidd Lake, Washington County, Arkansas

This data release consists of three different types of data: including direct current (DC) resistivity profiles, frequency domain electromagnetic (FDEM) survey data, and global navigation satellite system (GNSS) coordinate data of the geophysical measurement locations. A data dictionary is included along with the data and defines all of the table headings, definitions, and units. Earthen dams are common on lakes and ponds, but characteristics of these structures such as construction history, composition, and integrity are often unknown for older dams. Geophysical surveying techniques provide a non-invasive method of mapping their lithology and structure. In particular, DC resistivity and FDEM methods can,...

Categories: Data; Tags: Arkansas, Bob Kidd Lake, Direct current resistivity, Earthen dam, Earthen structure, All tags... Electric resistivity tomography, Electrical resistivity, Electromagnetism, Frequency domain electromagnetism, GNSS/GPS data, Geophysical survey, Prairie Grove, USGS Science Data Catalog (SDC), Washington County, biota, Fewer tags

Iditarod survey area: Airborne magnetic and electromagnetic data in line, grid, vector, and map formats, and descriptive project report, Innoko, Iditarod, and McGrath mining districts, Iditarod and Ophir quadrangles, western Alaska

This digital publication, GPR 2011-4, contains Fugro Airborne Surveys' analysis and interpretation of data produced from airborne geophysical surveys published by DGGS in 2011 (GPR 2011-2) of the Iditarod survey area. Fugro Airborne Surveys' frequency-domain DIGHEM V system was used for the EM data. GPR 2011-4 includes (1) Fugro's project report with interpretation and detailed EM Anomalies in tabular format, (2) Multi-channel stacked profiles in pdf format, and (3) interpretation and em anomalies are each provided as Geotiffs and maps. The document gpr2011_004_readme (.txt and .pdf) lists all files included in this publication. Other supporting files include gpr2011-4_browsegraphic.pdf, gpr2011-4_emanomaly_readme.pdf....

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical / Geological Mineral Inventory, All tags... Airborne Geophysical Survey, Alaska, State of, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, DIGHEM V EM System, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, Geophysical Survey, Geophysics, Geophysics Search Tag, HEM Survey, Iditarod Mining District, Iditarod Quadrangle, Innoko Mining District, Interpretation, Magnetic Survey, Magnetics, McGrath Mining District, Ophir Quadrangle, Project Report, Stacked Multi-Channel Profiles, geoscientificInformation, Fewer tags

Iron Creek airborne electromagnetic and magnetic geophysical survey data compilation

Frequency domain electromagnetic data and magnetic geophysical data were collected below a helicopter using a 30 meter (m) long line and a towed bird for the 1997 Iron Creek survey. The geophysical data were acquired with a DIGHEM-V Electromagnetic (EM) system, a Scintrex cesium magnetometer, and a Herz VLF system installed in on AS350B-2 Squirrel helicopter. In addition, the survey recorded data from a radar altimeter, GPS navigation system, 50/60 Hz monitors and video camera. Many of the files for this release were published on paper and available by mail order beginning in 1998. This updated data release provides a compilation of the previously published paper files (in PDF format) and the originating data files...

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Airborne Geophysical Survey, Alaska, State of, All tags... Analytic Signal, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, DIGHEM-V EM System, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, First Vertical Derivative, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Gridded Data, HEM Survey, HFEM Survey, Line data, Magnetic Contours, Magnetic Data, Magnetic Survey, Magnetics, Raster Image, Resistivity, Strategic Minerals, Talkeetna Mountains, Talkeetna Mountains Quadrangle, Valdez Creek Mining District, Yentna Mining District, geoscientificInformation, Fewer tags

Petersville mining district electromagnetic and magnetic airborne geophysical survey, data compilation

This publication, GPR 2015-3, contains geophysical data produced from airborne surveys conducted in 1996 and released in 1997 for 415 sq miles of the Petersville mining district, Alaska by the Alaska Division of Geological & Geophysical Surveys (DGGS). Aeromagnetic and electromagnetic data were acquired during the helicopter-based surveys. During 2004, the same digital data were reformatted for ease of use with modern processing tools, vector files and the 56,000 Hz resistivity grid, were added, and new color maps were produced. Except for leveling of the 56,000 Hz coplanar resistivity grid, no reprocessing of the geophysical data was done. The files represent the end part of the 2004 process. A few maps produced...

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Alaska, State of, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, DIGHEM-V EM System, Digital Elevation Model, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, First Vertical Derivative, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Petersville Mining District, Resistivity, Resistivity Survey, Talkeetna Quadrangle, geoscientificInformation, Fewer tags

Electric Resistivity Tomography (ERT) surveys conducted near campgrounds on the Buffalo National River, Arkansas

Karst environments present many challenges to agencies and engineers attempting to work in these landscapes, particularly towards building infrastructure. The interconnectivity of karst hydrologic systems means that activities occurring on the surface of a karst landscape can have an impact on water quality and quantity. Additionally, soil thickness in karst landscape is often highly variable due to the presence of solutionally-enlarged fractures, joints, and openings at the soil-bedrock interface. Therefore, when planning infrastructure in karst terrains it is critical to do a thorough assessment to ensure that planned activities will not negatively impact the sensitive environment. In October 2020 Electric Resistivity...

Categories: Data; Tags: Arkansas, Buffalo National River, Buffalo River, Geophysics, Hydrology, All tags... Jasper, Newton County, Ozarks, USGS Science Data Catalog (SDC), Water Resources, biota, electrical resistivity imaging, environment, geophysical survey, geophysics, karst, resistivity, Fewer tags

Kuskokwim Airborne Magnetic and Radiometric Survey, Sischu Mountains

Kuskokwim airborne magnetic and radiometric survey, Sischu Mountains, Geophysical Report 2024-1, covers parts of the Ruby, Kantishna River, Mt. McKinley, Medfra, and Ophir quadrangles north of McGrath, Alaska. Magnetic and radiometric data were collected with a helicopter between July 14, 2023, and October 15, 2023, by Geotech Ltd. The survey contains a single block covering 8,008 km2. A total of 25,878 line-kilometers were collected. The magnetometer was installed inside the stinger attached to the helicopter nose. The airborne gamma-ray spectrometer was mounted on the interior floor of the helicopter cabin. The block was flown with a line spacing of 400 m. The mean ground clearance is 192 m with a nominal survey...

Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Airborne Geophysical/Geological Mineral Inventory, Alder Creek, Analytic Signal, Attonock Mount, Baker Creek, Bear Creek, Beaver Creek, Big Beaver Creek, Black Creek, Boston Creek, Boulder Creek, Bridge Creek, Butte Creek, Canyon Creek, Clearwater Creek, Colorado Creek, Colorado Creek Mine, Cottonwood Creek, Creston Creek, Cripple Creek, Cripple Creek Mountains, DGGS, Dolomite Creek, Dominion Creek, Dyckman Mountain, Eden Creek, Exploration, Figure Creek, Fire Creek, Flat Creek, Folger Creek, Fossil Mountain, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Graham Creek, Granite Creek, Gridded Data, Hardscrabble Creek, Hosmer Creek, Idaho Creek, Innoko Mining District, Johns Creek, Jones Creek, Kimbley Creek, King Creek, Kinger Creek, Limestone Mountain, Lind Creek, Line Data, Lone Indian Mountain, Lynx Creek, Magnetic Data, Magnetic Survey, Magnetic Susceptibility, Magnetics, Marten Creek, McGrath Mining District, Meadow Creek, Medicine Creek, Mineral Development, Mineral Exploration, Mineral Localities, Mineral Resources, Mineral Resources, Minerals, Montana Creek, Mystery Creek, Mystery Mountains, Novi Mountain, Nowitna River, Page Mountain, Paradise Pass, Pass Creek, Quartz Creek, Radiometric Survey, Radiometrics, Remote Sensing, Ruby Mining District, Rungun Creek, Scow Harry Creek, Sethkokna River, Shellman Creek, Shepherd Creek, Shepherd Mountains, Shorty Creek, Sischu Creek, Sischu Mountains, Soda Creek, Stone Creek, Stone Mountain, Submarine Creek, Sulukna River, Sunshine Mountains, Susulatna Hills, Susulatna River, Telsitna River, Titna River, USGS Science Data Catalog (SDC), Von Frank Creek, Von Frank Mountain, Washington Creek, Whirlpool Creek, Whirlwind Creek, Whirlwind Ridge, White Mountain Creek, Wyoming Creek, geoscientificInformation, Fewer tags

Sub-regional, merged, gridded airborne geophysical data

Merged grids of residual magnetic intensity, digital terrain model, and apparent resistivity compiled from the Tok, Ladue, Slate Creek - Slana River, Alaska Highway Corridor, and Fortymile geophysical surveys.

Tags: Airborne Geophysical Survey, Alaska, State of, Geophysical Map, Geophysical Survey, Geophysics, All tags... Geophysics Search Tag, Gridded Data, geoscientificInformation, Fewer tags

Airborne Magnetic Geophysical Survey of the Porcupine River Area, Alaska

The Porcupine River fixed wing aeromagnetic geophysical survey is located in eastern Alaska, along the Canadian border, in the Sheenjek and Black mining districts. This survey is located about 135 kilometers east of Fort Yukon, Alaska and about 85 kilometers east of Circle, Alaska. Magnetic data were collected with a Geometrics G-822A cesium-vapor split-beam sensor mounted in a tail stinger. Between May 5th and June 28th, 2017, a total of 50,329 line kilometers were collected covering 13,646.9 square kilometers. Data were collected at a line spacing of 300 meters (m) with a mean ground clearance of 235 m. The data, as well as additional metadata, are available from the DGGS website: https://doi.org/10.14509/29737....

Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Analytic Signal, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, Bear Mountain Creek, Big Mountain, Black River, Black River Quadrangle, Bull Creek, Campbell River, Canalaska Mountain, Canyon Village, Charley River Quadrangle, Coleen Quadrangle, Conductivity Survey, David Creek, Dempsey Creek, Dorothy Creek, Drifting Snow Creek, Electromagnetic Data, Electromagnetic Survey, Exploration, First Vertical Derivative, Fish Creek, Fred Creek, Frequency Domain Electromagnetic Data, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Grayling Fork Black River, Gridded Data, Howling Dog Creek, Kevinjik Creek, Lake Creek, Line Data, Magnetic Data, Magnetic Survey, Magnetics, Marten Creek, Midnight Creek, Midnight Hill, Mineral Resources, Owl Creek, Pern Lakes, Pink Bluff, Racquet Creek, Rapid River, Rat Creek, Remote Sensing, Resistivity, Resistivity Survey, Rice Gulch Creek, Rocky Mountain, Runt Creek, Salmon Fork Black River, Salmon Trout River, Siwash Creek, Smith Lake, Spike Mountain, Steamboat Mountain, Strangle Woman Creek, Sunaghun Creek, Surveyor Creek, Tetthajik Creek, Tikan Creek, USGS Science Data Catalog (SDC), Van Hatten Creek, Vunvekottlui Lake, White Mountain Creek, Wood River, geoscientificInformation, Fewer tags