Definition: Telluric Survey

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Telluric Survey

Telluric currents, or earth currents, are generated through electromagnetic induction processes due to natural, passive geomagnetic micropulsations. The measurement of telluric currents enables determination of the strata thickness and resistivity profile with depth.[1]

Wikipedia Definition

A telluric current (from Latin tellūs, "earth"), or Earth current, is an electric current which moves underground or through the sea. Telluric currents result from both natural causes and human activity, and the discrete currents interact in a complex pattern. The currents are extremely low frequency and travel over large areas at or near the surface of the Earth.




References
  1. http://library.seg.org/