Abstract
If a time-varying electromagnetic field is produced on the surface of the ground currents will flow in sub-surface conductors in accordance with the laws of electromagnetic induction. These currents give rise to secondary electromagnetic fields which distort the primary field observed at any point on the surface. In general, the resultant field, which may be picked up by a suitable search coil, will differ from the primary field in intensity, phase and direction and reveal the presence of the conductors.
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© 1979 D. S. Parasnis
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Parasnis, D.S. (1979). Electromagnetic continuous wave, transient-field and telluric methods. In: Principles of Applied Geophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5814-2_6
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DOI: https://doi.org/10.1007/978-94-009-5814-2_6
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-412-15810-0
Online ISBN: 978-94-009-5814-2
eBook Packages: Springer Book Archive