Refraction method was the first method used in seismic prospecting. It has a major applicability in shallow investigation, being frequently used in geology and hydrogeology investigations.
The method is based on tracking and analyzing the seismic waves which are refracted on a surface that separates two different mediums with different proprieties of wave velocity. Generating the signal for the measurements does not pose particular problems for small depths, like in case of engineering projects.
Applications of seismic refraction:
- Detection and mapping of geological layers
- Bedrock depth
- Identification of fractures in the bedrock
- Mapping of sand and gravel deposits
- Properties of soil and rock
- Stratigraphic profiling or mapping
- Mapping groundwater depth
- Deposits filling
- Determination of the sliding plane