Seismic refraction is a proven technique used by geoscientists to locate groundwater supplies and map underground bedrock formations. This innovative technology has been employed for years to locate deposits of valuable resources and evaluate potential construction sites. Below is a brief overview of seismic refraction and when it might be used to investigate subsurface ground conditions.

What Is Seismic Refraction?

Seismic refraction works by creating artificial seismic waves, like those generated by earthquakes or mudslides. These waves bend or wrap as they pass through boundaries between layers of rock, soil, or water with different density, much like light refracts in water.

Sensors located at different locations from the source of the vibrations measure the power and angle of the waves. Using sophisticated software, geoscientists can use this data to create three-dimensional maps of underground rock formations, faults, and groundwater sources.

What Are the Benefits of Seismic Refraction?

Seismic refraction technology can be easily deployed to cover expansive areas at low cost, which makes it ideal for surveying government land and large construction sites. It’s also typically faster and less expensive than exploratory drilling or other commonly used mapping techniques.

Despite its low cost, seismic refraction delivers more high-resolution imaging than gravity, magnetic, or electrical methods. If your project involves locating groundwater supplies or identifying oil deposits, seismic refraction helps ensure the accuracy of any subsequent drilling projects.

Unlike drilling, it’s also minimally intrusive, which makes it ideal for sensitive environments. Because the seismic waves travel underground, this technology can be deployed without clearing the land or disturbing plant life.

As Alaska’s leading geotechnical services company, GeoTek Alaska provides seismic refraction, auger drilling, and groundwater location services for projects across the state. With 20 years of experience and access to some of the most advanced equipment in the industry, their geoscientists know how to deliver results even in the depths of the Alaskan landscape. Visit their website to learn more about seismic refraction, or call (907) 569-5900 to discuss your project with a geoscientist today.