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AESI employs state-of-the-art non-invasive geophysical methods to characterize subsurface soils, geologic structure, and groundwater.  Our geophysical studies combine with our hydrogeologic and geotechnical expertise for cutting edge site classification for seismic design, slope stability modeling, landslide studies, groundwater resource and flow models, and more.  Geophysical methods employed by AESI are summarized below:   

Surface Wave Methods

  • Multichannel Analysis of Surface Waves (MASW) for Vs100 site classification and S-Wave Velocity Sounding/Tomography

  • Microtremor Array Measurements (MAM) for Vs100 site classification and S-Wave Velocity Sounding

Horizontal to Vertical Spectral Ratio

  • Site Characterization for Seismic Hazard Assessment

  • Bedrock Depth Estimation


  • Mapping Subsurface Geologic Structure

  • Groundwater Studies

Seismic Refraction

  • Subsurface Geology Characterization and P-wave Velocity Tomography

  • Depth to Bedrock

  • Rippability Studies

  • Groundwater Exploration

  • Landslide and Slope Stability Assessment

Electrical Resistivity Tomography

  • Groundwater Resources

  • Subsurface Geology Characterization

  • Landslide and Slope Stability Assessment

  • Environmental Site Characterization (spills, contaminant plumes, etc)

Construction Vibration Monitoring

  • Continuous vibration monitoring for blasting, pile driving or similar activities.

  • Instantaneous access to data via a website

  • Alert system for vibration thresholds

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