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Csamt with the Long-range Action of Thousands Kilometers
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 74th EAGE Conference and Exhibition incorporating EUROPEC 2012, Jun 2012, cp-293-00621
- ISBN: 978-90-73834-27-9
Abstract
Features of a modification of the controlled source audio-frequency magnetotellurics (CSAMT) sounding method with a powerful source and the long-range action of thousands kilometres are considered. Characteristics of electromagnetic field of a cable as a source in this CSAMT modification are analyzed and a waveguide zone at great distance from the source is allocated. Differences of the electromagnetic field structure in the waveguide zone are analyzed in comparison with the usually allocated near-field, intermediate and far-field zones. Technique of CSAMT data correction in the intermediate zone and an experimental example of its using are described.