Products & Services
Marine magnetotellurics (MMT)
Our understanding of the subsurface EM response can be improved by MMT measurements.
Variations in solar activity create EM fields in the subsurface by directly and indirectly influencing the Earth's magnetic field. This fluctuation of the Earth's magnetic field acts as a natural EM source that transmits frequencies ranging from
1 × 10-5 to 1 × 103 Hz, although the sea filters out most of the signal above 1 Hz. EMGS receivers are sensitive to a wide range of frequencies and can operate on the sea floor for long periods. These features make them well suited for recording MMT surveys.
MMT measurements complement seabed-logging surveys. The low frequencies involved and the greater sensitivity of MMT to conductive, rather than resistive, layers make the method suitable for studying deep subsurface conductivity.
EMGS can acquire MMT data on its own, or as a complementary service during a comprehensive EMGS seabed-logging survey.
Contact findinghydrocarbons@emgs.com for further information.
