VSP surveys
A VSP survey (Vertical Seismic Profiling) is a specific case of the seismic surveys. In this case the geophone is used as a logging tool, placed into a deep hole, close to the geological target zone. This method can result in higher resolution in the vicinity of the borehole.
Other geophysical methods
Beside the seismic surveys GES is prepared to carry out other (gravity, magnetic etc.) surveys also.