The electromagnetic techniques for subsoil prospecting are based on measuring and analyzing the behavior of electromagnetic fields induced in the ground by means of pulses of specific currents circulating through a coil placed horizontally on the ground.

The surveying equipment consists of a current transmitter with its power supply, a transmitter coil, the receiver of the induced fields and a digital recorder to record the data for later study and analysis.

Depending on the domain on which the work focuses, there are two different groups of techniques: the time domain (TDEM) and the frequency domain (FDEM).

Main applications:

• Geotechnical studies
• Soil contamination studies
• Location of groundwater
• Saline intrusion research
• Mining exploration