Space Science Reviews

, Volume 35, Issue 1, pp 83–89 | Cite as

Natural and man-made noise in the Earth-ionosphere cavity at extremely low frequencies (Schumann resonances and man-made ‘interference’)

  • Charles Polk


The equations for the Earth-ionosphere cavity resonance fields are given and some of the approximations used in their derivation are indicated. Typical electric and magnetic 5 to 20 Hz Schumann resonance field intensities are listed and compared with the level of other natural and man-made electromagnetic noise. Applications of Schumann resonances to thunderstorm location and measurement of global lightning activity are reviewed briefly. Ionospheric conductivity profiles appropriate for this frequency range are discussed and the importance of atmospheric conductivity below 60 km is pointed out.


Field Intensity Cavity Resonance Resonance Field Lightning Activity Schumann Resonance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company 1983

Authors and Affiliations

  • Charles Polk
    • 1
  1. 1.Department of Electrical EngineeringUniversity of Rhode IslandKingstonUSA

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