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Electromagnetic surveying
Method of determining the shape and constituency of near-surface earth structures by variations of responses of the materials to electrical and magnetic fields. Use for ground-based methods of imaging.
This category is also used for magnetotelluric sounding.
Subtopics:
(none)

Magnetic surveying (7 items)
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Results 1 - 10 of 23 listed by similarity [list alphabetically]
PDF Time-domain electromagnetic soundings near Antioch, Illinois,and Berrien Springs, Michigan [New Window]
Study to help constrain 3-dimensional geologic maps of surficial materials in these glacial deposits
Transient electromagnetic soundings near Great Sand Dunes National Park and Preserve, San Luis Valley, Colorado (2006 field season) [New Window]
Geophysical surveying data used to infer subsurface configuration of impermeable layers in this Pliocene-Pleistocene lake bed.
Aerial magnetic, electromagnetic, and gamma-ray survey, Berrien county, Michigan [New Window]
Maps, grids, and flight-line databases of a detailed aerial survey and maps and grids of satellite data
Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010 [New Window]
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 mapping of the base of aquifer in areas of western Nebraska [New Window]
Gridded data used to revise base of aquifer, with supporting elevation data.
An interpretation of the 1997 airborne electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona [New Window]
Grids and flight-line magnetic and conductivity data
Geophysical investigation of Red Devil mine using direct-current resistivity and electromagnetic induction, Red Devil, Alaska, August 2010 [New Window]
This large producer of mercury operated from 1933 to 1971. As part of remediation work, this survey used electromagnetic methods to study subsurface resistivity.
Helicopter electromagnetic and magnetic geophysical survey data, Hunton anticline, south-central Oklahoma [New Window]
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 [New Window]
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 [New Window]
Geophysical surveys to map shallow hydrogeologic features of the southwestern part of the Sand Hills that contain a mix of fresh to saline lakes.
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