Radio Emissions from Rock, Iron, and Wood and an Example of Radio Noises Associated with Earthquake

  • T. Ogawa
  • S. Yano
  • K. Oike
  • A. C. Fraser-Smith


The experiment was made with rock, iron, and wood by hitting those samples with either an iron hammer or the same kind of matter as the sample. Electric (E) and magnetic (H) fields of ELF/VLF radio noises were measured in the experiment. It was observed that the E field was e- mitted rather than the H field from rock and wood, while the H field was emitted rather than the E field from iron. As a related subject to this experiment an example of anomalous radio noises observed associated with earthquake is shown.


Rock Sample Radio Emission Initial Pulse Radio Noise Field Spectrum 
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Copyright information

© Springer-Verlag Tokyo 1991

Authors and Affiliations

  • T. Ogawa
    • 1
  • S. Yano
    • 2
  • K. Oike
    • 3
  • A. C. Fraser-Smith
    • 4
  1. 1.Department of PhysicsKochi UniversityKochiJapan
  2. 2.Department of Electrical EngineeringKochi National College of TechnologyKochiJapan
  3. 3.Geophysical InstituteKyoto UniversityKyotoJapan
  4. 4.STARLAB, Department of Electrical Engineering/SELStanford UniversityStanfordUSA

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