International Geophysical Services, LLC | 68 followers on LinkedIn. IGS provides geophysical consulting and services for resource exploration and subsurface site characterization. We specialize in the processing and interpretation of airborne and ground potential field (magnetic and gravity), induced polarlzation (IP), DC resistivity, time and frequency domain electromagnetic (EM), and shallow seismic refraction \ reflection data applied to gold and base metal exploration, hydrocabon exploration and development, and environmental subsurface site characterization.