Seismic Methods


Geophysics

Seismic methods measure the seismic velocity of soil and rock. This is typically a function of the physical properties & density of the soil and rock in the subsurface. Seismic measurements are completed using a seismic source, geophones, and seismograph. Typically energy is induced at the surface via a seismic source. Arrival of the seismic wave is sensed by geophones and recorded digitally and graphically by the seismograph. Collier employees various types of seismic methods to various problems including: reflection, refraction, tomography, active and passive MASW, downhole and crosshole seismic, and marine applications.

Seismic Refraction Tomography Profile

 

Example Processed Seismic Reflection Profile
Example Processed Seismic Reflection Profile

 

Typical Applications of the Seismic method

  • Overburden thickness
  • Bedrock topography
  • Water table depth
  • Rippability of bedrock
  • Lithology
  • Fractures, faults, & karst
  • P and S Wave velocity for Dynamic Modulus calculations
  • Characterization for Geotechnical and Civil Engineering Projects
  • Dam and levee assessment
  • Oil and gas exploration
  • Marine applications
  • 2D and 3D Imaging