They conducted magnetic and electromagnetic surveys, as well as mapping and drilling.
2.
In 1959 and 1960, Goldfields Mining conducted a basic airborne electromagnetic survey and magnetic survey over the property.
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During 2009, the vessel was chartered for electromagnetic survey work in the North Sea, Norwegian Sea and Barents Sea.
4.
At lower frequencies, such as those EM waves suitable for electromagnetic surveys of the terrestrial and near-earth environment, VLBI is much easier.
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The WMC / BHP Billiton joint venture with Albidon Ltd . of Australia conducted airborne and ground electromagnetic surveys, mapping, and soil sampling on its Selebi-Phikwe nickel project.
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The second geophysical project tested how effectively human explorers in space suits could deploy low frequency electromagnetic survey equipment, a TEM47 PROTEM provided by Geonics Limited, to search for groundwater beneath Haynes Ridge near the hab location.
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Geophysical techniques used for subsurface exploration include measurement of seismic waves ( pressure, shear, and Rayleigh waves ), surface-wave methods and / or downhole methods, and electromagnetic surveys ( magnetometer, resistivity, and ground-penetrating radar ).
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And, whenever I find something missing on Wikipedia related to water wells, I go straight to the Schlumberger reservoir and geology encyclopedia website : here's a query for " isotropy ", which prompted me to recall that electromagnetic surveys are also used in the study of water and hydrocarbon reservoirs, and electromagnetic properties are frequently anisotropic . talk ) 23 : 12, 26 February 2013 ( UTC)
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