Observations on Schumann resonance in industrial area

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Observations on Schumann resonance in industrial area

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Schumann resonance (SR) can be used to monitor global temperature variations, to explore new geophysics phenomena in the low ionosphere and for short-term earthquake prediction, etc. However, it cannot be observed in the industrial area by the traditional monitoring method. Yampolski et al. observed the first three spectrum peaks of SR cross-modulated on the high frequency waves. The engineering work has been researched in this Letter. By demodulating the short-wave time service signal BPM on 10 MHz, the first four peaks of Schumann resonance were obtained with only a simple cross-dipole antenna. Also the cross-modulation index was measured up to 1×10−4 compared to 3.5×10−4 by academic calculation. The feasibility of the engineering is validated. The other possible method to observe SR is discussed.

Inspec keywords: atmospheric techniques; ionospheric electromagnetic wave propagation; ionosphere; earthquakes; atmospheric temperature; atmospheric waves

Other keywords: industrial area; cross-dipole antenna; short-term earthquake prediction; global temperature variation; Schumann resonance; spectrum peaks; frequency 10 MHz; short-wave time service signal demodulation; cross-modulation index; low ionosphere

Subjects: Temperature of the lower atmosphere; Earthquake prediction and precursory phenomena; Instrumentation and techniques for geophysical, hydrospheric and lower atmosphere research; Electromagnetic wave propagation and interactions in the lower atmosphere; Ionospheric electromagnetic wave propagation

References

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      • K. Ohta , N. Watanabe , M. Hayakawa . Survey of anomalous Schumann resonance phenomena observed in Japan, in possible association with earthquakes in Taiwan. Phys. Chem. Earth, Parts A/B/C , 397 - 402
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      • Y.L. Alpert . (1972) Propagation of electromagnetic waves and the ionosphere.
    3. 3)
      • M. Hayakawa , A.P. Nickolaenko , M. Sekiguchi , K. Yamashita , Y. Ida , M. Yano . Anomalous ELF phenomena in the Schumann resonance band as observed at Moshiri (Japan) in possible association with an earthquake in Taiwan. Nat. Hazards Earth Syst. Sci. , 6 , 1309 - 1316
    4. 4)
      • Y.M. Yampolski , P.V. Bliokh , V.S. Beley , V.G. Galushko , S.B. Kascheev . Non-linear interaction between Schumann resonances and HF signals. J. Atmos. Sol.-Terr. Phys. , 3 , 335 - 342
    5. 5)
      • W.O. Schumann . Über die Ausbreitung sehr Langer elektriseher Wellen um die Signale des Blitzes. Naturwiss , 183 - 184
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      • A.V. Gurevich . (1978) Nonlinear phenomena in the ionosphere.
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