Geophysics - Electromagnetic (EM)

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Electrical Resistivity Method
Induced Polarization
Self Potential (SP)
Ground-penetrating radar (GPR)
Gravity Surveys
Magnetics Ground
Seismic Refraction and Reflection
Electromagnetic (EM)
Magnetotellurics (MT)
Earthquakes and Vibration monitoring
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- The EM method measures the conductivity of earth materials, buried objects, and backfill utilizing electromagnetic induction.
Comparing in-phase and quadrature EM data, or EM and magnetic contour maps, can benefit a project by differentiating ferrous and non-ferrous sources of elevated conductivity (such as drums versus landfill leachate).
Electrical Resistivity Imaging, Soundings, and Profiling - Electrical resistivity methods can measure depths to groundwater and bedrock, and locate clay layers, sand and gravel deposits, and leachate plumes from lagoons or landfills.
Geophysical Applications utilizes digital resistivity instrumentation and the linear filter modeling technique to obtain accurate layer thickness interpretations during resistivity sounding surveys. Automated dipole-dipole profiling surveys are conducted using an ABEM resistivity system or Advanced Geosciences Sting resistivity meter and Swift electrode array, with inversion software to generate contoured resistivity cross sections. 

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