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Subsurface Geophysical Surveys

Shallow Underground Surveys and Non-Destructive Evaluation



Seismic Reflection Surveys

Seismic Refraction and MASW Shear-Wave Velocity Profiling

Ground-Penetrating Radar Investigations

Other Projects


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the new San Francisco water supply tunnel, the Los Angeles Metro-Rail subway, and the City of Portland's Columbia Slough sewer tunnel.  We have performed high-resolution seismic surveys at large commercial and residential building sites to help locate subsurface faulting in the upper 600 feet associated with major California fault systems, such as the San Andreas, Santa Monica, Owens Valley, Whittier, and Camarillo faults.  We have also completed deep electrical resistivity profiling across desert basins in the eastern Mojave Desert to investigate groundwater resources.

AGI has also conducted seismic reflection surveys for mineral exploration projects in California and Nevada.

We also routinely perform smaller-scale GPR and multi-sensor geophysical surveys (using magnetic and electromagnetic techniques) to locate near-surface cavities, underground pipelines, buried concrete structures, abandoned well casings, and other substructures.

Company Profile

Advanced Geoscience, Inc. is a Southern California-based firm specializing in subsurface geophysical surveys for geological investigations, groundwater exploration, and exploration of mineral resources.  We also perform shallower geophysical surveys for geotechnical and pre-construction  investigations, as well as the non-destructive evaluation of earth structures, such as dams, tunnels, and subsurface foundations.

We are geophysicists and geologists who offer an innovative approach to solving subsurface problems, utilizing seismic and radar imaging, as well as other state-of-the-art geological and geophysical technology.  We have a proven record for providing results on a timely basis.

Since our firm was established in 1997, we have completed numerous successful geophysical surveys at sites throughout the Western United States and Pacific Rim.  We have performed seismic surveys to investigate subsurface conditions for dams in California and Hawaii, and tunneling projects such as 


We have completed many of these projects for large public agencies such as the U.S. Navy, U.S. Bureau of Reclamation, California Department of Transportation, Los Angeles Department of Water & Power, Portland Bureau of Environmental Services, San Francisco Public Utilities Commission, City of Los Angeles Bureau of Engineering, City of Phoenix, City of Las Vegas, Los Angeles County Sanitation Districts, San Diego Water District, Port of Long Beach, Los Angeles County Metropolitan Transportation Authority, and Ojai Valley Sanitary District.  Our clients for these projects include some of the largest construction and engineering consulting firms in the Western United States.