EM mapping is a versatile tool that can be used in a variety of applications. Here are some examples:
Exploring for buried objects: EM mapping can be used to detect buried objects, such as pipelines, storage tanks, and UXO (unexploded ordnance).
Mapping geologic features: Variations in subsurface composition can be mapped using EM methods. This is especially useful in mapping superficial deposit variations, faults and quarrying resources such as gravel deposits.
Environmental applications: EM methods can be used to map groundwater contamination, leachates from landfill sites, and other environmental hazards.
Surveying for archaeological relics: EM mapping can be used to locate buried archaeological artefacts.
EM methods are often used in conjunction with other reconnaissance geophysical techniques, such as Ground Penetrating Radar (GPR) to provide an indicative map of subsurface features/obstructions. It is also complimented well by techniques such as electrical resistivity and seismic surveys to provide further anomaly classification and depth constraint.
These combined approaches helps to give a more complete picture of the subsurface.