Seismic Refraction Survey

Seismic refraction is a useful geophysical method used in the fields of engineering geology, geotechnical engineering, and exploration geophysics. The seismic refraction method utilizes the refraction of seismic waves at the interface between subsurface/geological layers in order to characterize the subsurface geological structure and rock properties.

Seismic refraction utilizes hammer/gun/explosive source at the surface and records earth responses via an array of geophones or hydrophones. The travel-times of first arrivals are derived from the data and then processed to develop 2D/3D subsurface models.

• Mapping bedrock tomography and overburden thickness
• Locating buried channels
• Investigating faults, sinkholes and other geohazards
• Landfill investigation
• Estimation of depth to water table
• Estimation of rock rippability


• Cost Effective
• Non-invasive and environmentally friendly
• Can be performed on both land and water-covered area


Worldwide Distributors

Specialty Devices Inc.
2905 Capital St.
Wylie Texas 75098

972-429-7240 office

European Distributors

Aquifer Advies bv
Ben ten Toom
Dr. Langeveldplein 6
3361 HE Sliedrecht
0184 – 413147
06 – 24745947

About SDI

For over 30 years, SDI has designed and manufactured bathymetric and sub-bottom survey systems, sediment coring devices, and other specialized survey systems. SDI also provides geospatial, geophysical, hydrographic, sub-bottom, and sediment sampling services.