Electromagnetic Geoservices
 Electromagnetic Geoservices ASA (EMGS) is a Norwegian geophysical services company using proprietary marine electromagnetic technology to support oil and gas companies in their search for offshore hydrocarbons. The administrative and research headquarters are located in Trondheim.The company was established on February 1 2002 by the founders Terje Eidesmo Ståle Johansen and Svein Ellingsrud.