THE ELECTRIC AND MAGNETIC FIELDS IN A STRATIFIED FLAT CONDUCTOR FOR INCIDENT PLANE WAVES

H. W. Dosso

doi:10.1139/p65-086

THE ELECTRIC AND MAGNETIC FIELDS IN A STRATIFIED FLAT CONDUCTOR FOR INCIDENT PLANE WAVES

Canadian Journal of Physics ◽

10.1139/p65-086 ◽

1965 ◽

Vol 43 (5) ◽

pp. 898-909 ◽

Cited By ~ 1

Author(s):

H. W. Dosso

Keyword(s):

Magnetic Fields ◽

Plane Waves ◽

Incident Plane ◽

Electric And Magnetic Fields

The electric and magnetic fields in the upper layer of a stratified flat conductor in the field of plane waves are studied. Expressions for the amplitude and phase of the components of the electric and magnetic fields are obtained and evaluated for various frequencies, angles of incidence, layer thicknesses, depths, and conductivities. The conductivities σ = 10−11 to 10−16 e.m.u. and the frequencies ƒ = 10−3 to 104 cycles/second considered are of interest in geophysics.

Download Full-text

THE EFFECT OF A DIPPING CONTACT ON THE BEHAVIOR OF THE ELECTROMAGNETIC FIELD

Geophysics ◽

10.1190/1.1440263 ◽

1972 ◽

Vol 37 (2) ◽

pp. 337-350 ◽

Cited By ~ 16

Author(s):

Richard G. Geyer

Keyword(s):

Magnetic Field ◽

Plane Waves ◽

Skin Depth ◽

Electromagnetic Response ◽

Vertical Magnetic Field ◽

Field Phase ◽

Incident Plane ◽

Electric And Magnetic Fields ◽

Orthogonal Components ◽

Integral Solutions

Theoretical solutions for the electromagnetic response of a dipping interface in the field of normally incident plane waves are given in the form of inverse Lebedev‐Kontorovich transforms. When the lateral resistivity contrast becomes very large, the resulting integral solutions simplify considerably and allow ready numerical evaluation. The amplitude response of the vertical magnetic field seems most diagnostic of the structural attitude of sloping interfaces, even though the vertical magnetic field phase appears relatively insensitive to dip changes compared to horizontal electric field phase. The disturbance in the homogeneity of the field caused by the presence of an inclined contact is postulated to be due to cylindrically diffused waves generated by the dipping interface and propagating along the earth’s surface. It would then seem that formulation of plane‐wave impedances from orthogonal components of the surface electric and magnetic fields would only be applicable at distances from the interface which are large relative to a skin depth in either layer. The results presented here should prove to be useful in detecting and defining sloping interfaces or in avoiding their effects.

Download Full-text