pure and applied geophysics

, Volume 101, Issue 1, pp 174–187 | Cite as

Electromagnetic propagation in an idealized earth crust waveguide, part I

  • James R. Wait
  • Kenneth P. Spies


The electromagnetic mode characteristics for the earthcrust waveguide are considered. The formulation allows for any depth-conductivity profile, but the specific results are only for a homogeneous sub-surface waveguide region with a finitely conducting lower layer and a perfectly conducting upper layer. Attenuation rates of the order of 1 dB/km are possible for operating frequencies of 20 kHz or lower if the crystalline rock in the waveguide has conductivities less than 10−6 mhos per meter.


Attenuation Lower Layer Specific Result Mode Characteristic Crystalline Rock 
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Copyright information

© Birkhäuser Verlag 1972

Authors and Affiliations

  • James R. Wait
    • 1
  • Kenneth P. Spies
    • 2
  1. 1.Cooperative Institute for Research in Environmental SciencesUniversity of ColoradoBoulder
  2. 2.Office of Telecommunications, U.S. Department of CommerceInstitute for Telecommunication SciencesBoulder

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