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Olson Instruments, Nondestructive Testing Equipment, Nondestructive Evaluation, Olsen | Testing Infrastructure Nondestructively

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August 16, 2018

Check Out Olson's New


Affordable Foundation Test Gauge


NDT System Add-On — Seismic Refraction / Reflection

USA Sales: 303.423.1212          International Sales: Click here for Map

Seismic Refraction/Reflection

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Base Model:
SRR-1 Model

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Scroll down to see a list of Available Models and Key Features for the Seismic Refraction / Seismic Reflection test method.

Save money! Contact Olson Instruments when adding on to an existing system, or purchasing multiple systems as some of the components are common to other test methods.


Seismic Refraction investigations are commonly used to determine bedrock depth & rippability.

Seismic Reflection surveys are used to map, detect, & delineate geologic conditions including the bedrock surface, voids, water table and layer geometry (folds).

The Seismic Refraction & Reflection (SRR) system is designed to allow for either seismic refraction or seismic reflection data acquisition. The SRR system, which is designed for shallow surveys, can also be used for detecting voids in large civil structures such as dams (seismic reflection).

Seismic Refraction surveys are used for excavation purposes to map the bedrock depth and evaluation rock rippability. Seismic refraction measurements are applicable in mapping subsurface conditions for various uses including geologic, geotechnical, hydrologic, environmental, mineral exploration, petroleum exploration, and archaeological investigations. Seismic Refraction investigations are commonly used to determine layer thickness and/or the subsurface compressional wave velocity of the overburden and underlying bedrock or to water table, stratigraphy, lithology, structure, and fractures. This inherently shallow technique requires that compressional seismic wave velocities increase with depth so wave refraction occurs.

Seismic Reflection surveys are used to map, detect, and delineate geologic conditions including the bedrock surface, confining layers (aquitards), faults, lithologic stratigraphy, voids, water table, fracture systems, and layer geometry (folds). This methodology requires that the target be sufficiently deep, so that the incoming reflected wave arrives after the surface wave generated from the impact. Near-surface seismic-reflection data are generally high-resolution (dominant frequency above 80 Hz) and image depths from around 20 ft (6 m) to as much as several hundred feet (100+ meters).

Freedom Data PC Platform Required, Sold Separately
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Hands-on training is available for all of our Nondestructive Testing Methods at our Wheat Ridge, Colorado (USA) location, which is a suburb located appromately 15 minutes northwest of downtown Denver. Training may be available at your location by one of our agents upon special arrangement.

For complete details about the Seismic Reflection / Seismic Refraction system available as an add-on test for the Freedom Data PC platform, call toll free 1-888-423-1214 or email:


Applicable On:

  • Mass Concrete
  • Mass Cyclopean Masonry
  • Rock
  • Soil

Test For:

  • Layer Thickness
  • Bedrock Topography
  • Water Table Depth/Mapping
  • Compressional Wave Velocity Profiles
  • Rippability/Excavatability
  • Fractures, etc.

Meets ASTM:

  • D7128-05
  • D5777-00

Meets ACI:

  • N/A


All of Olson Instruments have been researched, tested, and used on-site daily by our sister company, Olson Engineering, world reknowned for NDT consulting. The OE Website is loaded with Tech Brief and project photos using the equipment shown on this website. Purchase our products to “do-it-yourself”, or hire an Olson Engineering Nondestructive Testing professional for your next project