Seismic reflection involves measuring the travel time of body waves that are reflected from geologic contacts or manmade structures. As a generated seismic wave reaches an underlying, higher velocity stratum, a portion of the wave is reflected back towards the surface. A series of geophones is used to record the travel time of the reflected waves as they reach the ground surface. The depth of investigation can range from approximately 50 ft to 1000 ft. Seismic reflection is typically used for:
- Determining thickness and depth of geologic strata
- Evaluating complex geological structures and settings
- Mapping tunnels, mine shafts and caves
