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Volume 51 Supplement 10

Special Issue: Electromagnetic Induction in the Earth

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The use of electromagnetic data for short-term prediction of Vrancea (Romania) earthquakes: Preliminary data


Diagrams from electromagnetic data that were recorded at Muntele Roşu Observatory during the periods from December 1996 to January 1997, and December 1997 to September 1998 were plotted. The times when Vrancea earthquakes of magnitudes M ≥ 3.9 occurred within these periods are marked on the diagrams.

The magnetic data prove that Vrancea earthquakes are preceded by magnetic perturbations that may be regarded as their short-term precursors. Some of these perturbations may also be regarded either as geomagnetic storms or as instrument effects.

Perturbations, which could likewise be seen as short-term precursors of Vrancea earthquakes, are also noticed in the electric records. Still, a number of electric data do cast a doubt on their forerunning nature.

Some suggestions are made in the end of the paper on how electromagnetic research should go ahead to be of use for Vrancea earthquake prediction.


  • Enescu, B. D., C. Ionescu, and D. Enescu, Establishment of two electro-magnetic observatories in Vrancea (Romania) seismic area, Romanian Journal of Physics, 1999 (in press).

  • Ernst, T., J. Jankowski, C. Rozluski, and R. Teisseyre, Analysis of the electromagnetic field recorded in the Friuli seismic zone, northeast Italy, Tectonophysics, 224, 141–148, 1993.

    Article  Google Scholar 

  • Fraser-Smith, A. C., A. Bernardi, P. R. McGill, M. E. Ladd, R. A. Helliwell, and O. G. Villard, Jr., Low frequency magnetic field measurements near the epicenter of the MS 7.1 Loma Prieta earthquake, Geophys. Res. Lett., 17, 1465–1468, 1990.

    Article  Google Scholar 

  • Gokhberg, M. B., V. A. Morgunov, T. Yoshino, and I. Tomizawa, Experimental measurement of electromagnetic emissions possibly related to earthquakes in Japan, J. Geophys. Res., 87, 7824–7828, 1982.

    Article  Google Scholar 

  • Honkura, Y., E. R. Niblett, and R. D. Kurtz, Changes in magnetic and telluric field in a seismically active region of Eastern Canada: preliminary results of earthquake prediction studies, Tectonophysics, 34, 219–230, 1976.

    Article  Google Scholar 

  • Johnston, M. J. S., Review of electric and magnetic fields accompanying seismic and volcanic activity, Surv. Geophys., 18, 441–475, 1997.

    Article  Google Scholar 

  • Oncescu, M. C., V. I. Marza, M. Rizescu, and M. Popa, The Romanian Earthquake Catalogue, 984–1996, Natural Hazards, 1998 (in press).

  • Park, S. K., M. J. S. Johnston, T. R. Madden, F. D. Morgan, and H. F. Morrison, Electromagnetic precursors to earthquakes in the ULF band: a review of observations and mechanisms, Rev. Geophys., 31, 117–132, 1993.

    Article  Google Scholar 

  • Varotsos, P., K. Alexopoulos, and M. Lazaridou, Latest aspects of earthquake prediction in Greece based on seismic electric signals, II, Tectonophysics, 224, 1–38, 1993.

    Article  Google Scholar 

  • Yoshino, T., Low-frequency seismogenic electromagnetic emissions as precursors to earthquakes and volcanic eruptions in Japan, J. Sci. Explor., 5, 121–144, 1991.

    Google Scholar 

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Correspondence to B. D. Enescu.

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Enescu, B.D., Enescu, D. & Constantin, A.P. The use of electromagnetic data for short-term prediction of Vrancea (Romania) earthquakes: Preliminary data. Earth Planet Sp 51, 1099–1117 (1999).

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