Seismic Reflection Surveys

Seismic Application Include

General geologic structure

Faults and other hazards

Landfill investigation

Overburden thickness

Rock rippability and quality

Water table depth

Bedrock depth

Seismic Reflection follows the law of mirror images the angle of reflection from a surface is equal to the angle of incidence. Shots are fired, in turn, at each of the geophone positions and active geophones are progressively added ahead of the shots, and taken up from behind the shots, in a roll–along fashion. At each subsurface boundary, across which the elastic and density parameters differ, a percentage of the energy in the wave is reflected back to the surface where it is recorded. If a particular boundary is horizontal, the reflection point will be half way between the shot and any given geophone. Reflecting boundaries are mapped out as the system rolls along. Placing each reflection point in its proper place in the subsurface requires intense and complicated processing of the collected information.