A typical method is the very long frequency (VLF) method. In this method, we monitor the deformation of the field of long-wave transmitting stations (mostly military).
G IMPULS Praha uses a modern dipole measurement system with the GEM-2 device. Electromagnetic methods also include the georadar method, which is based on monitoring the reflections of radar waves at interfaces, which differ in their permittivity. The method detects artificial objects stored in the ground, monitors geological interfaces or searches for places with a contaminated environment. The real depth range of the method in our conditions is around eight meters.
The use of the radar method for railway and road construction is well developed in the Czech Republic. Tasks for forensic purposes or archeology are no exception.