Due to its broad applicability, we have chosen the seismic method as our subsurface imaging technique. In seismic subsurface exploration, multiple geophones (vibration sensor) are placed along a profile line (2D seismic) or along multiple intersecting profile lines (3D seismic) in the surface.
Subsequently, seismic waves are generated using a seismic source which can emit a long-lasting signal of a specific frequency or a wide range of frequencies (chirp signal) into the subsurface. This allows time- and cost-effective imaging and offers the highest flexibility in varying subsurface conditions.
The arrival times of the seismic waves at the geophones can then be used to calculate a model of the subsurface.