What is Electromagnetic method?


Electromagnetic methods are sensitive to variations in electrical properties of subsurface materials and can map out regions with enhanced conductivity because of the presence of fluids, metals, or other variations. Electromagnetic induction instruments induce currents in conductors within the subsurface without having to make direct contact with the ground.
Electromagnetic induction is a rapidly acquired method which is relatively easy to carry out. Applications include:

* Soil mapping,
* Mapping lateral changes in geology,
* Fault mapping,
* Detecting and mapping contaminant plumes,
* Mapping buried drums, tanks and metal utilities,
* Archaeological site investigation.

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