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The U.S. Geological Survey in cooperation with the Grand River Dam Authority completed a high-resolution multibeam bathymetric survey to compute a new capacity and surface-area table. The capacity and surface-area tables describe the relation between the elevation of the water surface and the volume of water that can be impounded at each given water-surface elevation. The capacity and surface area of Grand Lake O’ the Cherokees were computed from a Triangular Irregular Network (TIN) surface created in Global Mapper Version 21.0.1. The TIN surface was created from three datasets: (1) a multibeam bathymetric survey of Grand Lake O’ the Cherokees in 2019 (Hunter and others 2020), (2) a 2017 USGS bathymetric survey...
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This data release is a re-release of an airborne geophysical survey carried out for the United States Geological Survey (USGS) by Spectra Exploration Geoscience Corp., from November 2000 to February 2001. The purpose of this survey was to acquire high-resolution, high-sensitivity aeromagnetic data over an area in northeast and north-central North Dakota and assess the area for anomalies and magnetic features pertaining to the local geology. To achieve this purpose, the survey area was systematically traversed by an aircraft carrying geophysical instruments along parallel flight lines (traverses) spaced 0.25 miles (400 meters) apart in an east-west alignment. Tie lines were flown normal to the traverses spaced at...
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An ESRI GRID raster data model and TIN model of the overburden material above the LaClede bed of the Laney Member of the Eocene Green River Formation was needed to perform calculations in the Green River and Washakie Basins, southwestern Wyoming as part of a National Oil Shale Assessment.
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An ESRI GRID raster data model and TIN model of the LaClede bed of the Laney Member of the Eocene Green River Formation structure was needed to perform overburden calculations in the Green River and Washakie Basins, southwestern Wyoming as part of a National Oil Shale Assessment.
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This data release provides a map of the time-averaged shear-wave velocity in the upper 30 m (Vs30) for California using the method described by Thompson and others (2014). There are two adjustments to the algorithm described by Thompson and others (2014), which is built on the geology-based Vs30 map by Wills and Clahan (2006). In this data release, we use the Wills and others (2015) updated geology-based Vs30 map. The second change is that we have adjusted the kriging procedure so that measured Vs30 values do not affect the predictions across distinctly different geologic units. July 2022 Update (ver. 2.0) Resolution is now 3 arcseconds instead of 7.5 arcseconds Fixed a code error that prevented some of the Vs30...
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This data release comprises a georeferenced raster layer depicting the estimated susceptibility to intense rainfall-induced landslides in Puerto Rico, which is a supplement to: Hughes, K.S., and Schulz, W.H., 2020, Map depicting susceptibility to landslides triggered by intense rainfall, Puerto Rico: U.S. Geological Survey Open-File Report 2020–1022, 91 p., 1 plate, scale 1:150,000, https://doi.org/10.3133/ofr20201022. Users of this layer are strongly encouraged to read the text herein and available with Open-File Report 2020-1022. DEVELOPMENT OF THE LANDSLIDE SUSCEPTIBILITY MAP Landslides commonly occur in Puerto Rico during or soon after intense rainfall and present significant hazards to the built environment...
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Gravity data were collected in August of 2019 at 21 sites on and around Iliamna Volcano and Anchorage, Alaska. Measurements were taken with a Lacoste & Romberg G-161 meter and reduced to obtain the complete Bouguer anomaly. A total of 39 magnetic susceptibility measurements were taken at 13 locations using a ZH Instruments SM30 susceptibility meter. This data release includes susceptibility measurements, processed gravity data, shapefiles with field locations, and site photos.
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This publication provides digital flight line data for a high-resolution magnetic survey over an area of the central Upper Peninsula of Michigan. The survey area lies approximately between the towns of Iron Mountain and Chatham. Data for this survey were collected by EON Geosciences under contract with the USGS using a fixed wing aircraft with a magnetometer mounted in the tail stinger. The survey operated out of the Sawyer International Airport near Marquette, Michigan, from June of 2018 to September of 2018. A total of 38,474 line km of data were collected. Data were collected along north-south flight lines spaced 150 meters apart with east-west tie lines flown every 1,500 meters. The nominal terrain clearance...
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The USGS, in cooperation with the U.S. Bureau of Reclamation, surveyed the bathymetry within an area of about 500 acres of American Falls Reservoir between River Miles 713 and 714 during the week of August 6-8, 2019. The bathymetric survey provided high resolution detail of a proposed treatment area for an aeration system that is being developed to support water quality during the American Falls spillway concrete repair project and possibly thereafter. The Water Quality Restoration Plan detailing this effort is an appendix of the of the Final Environmental Assessment (EA) in conjunction with the National Environmental Policy Act (NEPA) compliance process.
    map background search result map search result map An Updated Vs30 Map for California with Geologic and Topographic Constraints (ver. 2.0, July 2022) American Falls Reservoir Bathymetry near River Mile 713 to 714, Power County, Idaho, 2019 Data release of Bathymetric Map, Surface Area, and Capacity of Grand Lake O' the Cherokees, Northeastern Oklahoma, 2019 Bouguer gravity and magnetic susceptibility measurements at Iliamna Volcano, Alaska 2019 Airborne magnetic survey, Iron Mountain-Chatham region, central Upper Peninsula, Michigan, 2018 GRID Raster Dataset Model and TIN Model of Overburden Above the LaClede Bed in the Green River and Washakie Basins, southwestern Wyoming GRID Raster Dataset Model and TIN Model of the LaClede Bed Structure in the Green River and Washakie Basins, southwestern Wyoming Raster Dataset Model of Overburden Above the Mahogany Bed in the Uinta Basin, Utah and Colorado TIN Dataset Model of Overburden Above the Mahogany Bed in the Uinta Basin, Utah and Colorado Raster Dataset Model of the Mahogany Bed Structure in the Uinta Basin, Utah and Colorado TIN Dataset Model of the Mahogany Bed Structure in the Uinta Basin, Utah and Colorado Raster Dataset Model of Overburden Above the Mahogany Zone in the Piceance Basin, Colorado Raster Dataset Model of the Mahogany Zone Structure in the Piceance Basin, Colorado TIN Dataset Model of Overburden Above the Mahogany Zone in the Piceance Basin, Colorado TIN Dataset Model of the Mahogany Zone Structure in the Piceance Basin, Colorado Geographic Information System Layer of a Map Depicting Susceptibility to Landslides Triggered by Intense Rainfall, Puerto Rico Airborne magnetic survey over northeast North Dakota, 2000-2001 American Falls Reservoir Bathymetry near River Mile 713 to 714, Power County, Idaho, 2019 Data release of Bathymetric Map, Surface Area, and Capacity of Grand Lake O' the Cherokees, Northeastern Oklahoma, 2019 TIN Dataset Model of Overburden Above the Mahogany Zone in the Piceance Basin, Colorado TIN Dataset Model of the Mahogany Zone Structure in the Piceance Basin, Colorado Raster Dataset Model of Overburden Above the Mahogany Zone in the Piceance Basin, Colorado Raster Dataset Model of the Mahogany Zone Structure in the Piceance Basin, Colorado Airborne magnetic survey, Iron Mountain-Chatham region, central Upper Peninsula, Michigan, 2018 Geographic Information System Layer of a Map Depicting Susceptibility to Landslides Triggered by Intense Rainfall, Puerto Rico TIN Dataset Model of Overburden Above the Mahogany Bed in the Uinta Basin, Utah and Colorado TIN Dataset Model of the Mahogany Bed Structure in the Uinta Basin, Utah and Colorado GRID Raster Dataset Model and TIN Model of Overburden Above the LaClede Bed in the Green River and Washakie Basins, southwestern Wyoming GRID Raster Dataset Model and TIN Model of the LaClede Bed Structure in the Green River and Washakie Basins, southwestern Wyoming Raster Dataset Model of Overburden Above the Mahogany Bed in the Uinta Basin, Utah and Colorado Raster Dataset Model of the Mahogany Bed Structure in the Uinta Basin, Utah and Colorado Airborne magnetic survey over northeast North Dakota, 2000-2001 Bouguer gravity and magnetic susceptibility measurements at Iliamna Volcano, Alaska 2019 An Updated Vs30 Map for California with Geologic and Topographic Constraints (ver. 2.0, July 2022)