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Magnetic perturbations before the strong earthquakes

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Abstract

The search for the magnetic precursors of earthquakes by the method of synchronous detection is described. The data of the Guam Observatory (13.6°N, 144.9°E) located in a seismically active region and the USGS/NEIC catalogue of the National Earthquake Information Center of the U.S. Geological Survey for the period from 1991 to 2009 are used. Earthquakes with magnitudes M ≥ 7 in the range of longitudes from 100° to 170°E are analyzed. The intervals of accumulation cover 40 hours before and 40 hours after an earthquake. The preliminary result reveals an enhancement of fluctuations in the Z-component within 12 hours before the earthquake.

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Authors and Affiliations

  1. Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, ul. Bol’shaya Gruzinskaya 10, Moscow, 123995, Russia

    A. V. Guglielmi

  2. Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Borok, Yaroslavl oblast, 152742, Russia

    O. D. Zotov

Authors
  1. A. V. Guglielmi
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  2. O. D. Zotov
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Correspondence to A. V. Guglielmi.

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Original Russian Text © A.V. Guglielmi, O.D. Zotov, 2012, published in Fizika Zemli, 2012, No. 2, pp. 84–87.

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Guglielmi, A.V., Zotov, O.D. Magnetic perturbations before the strong earthquakes. Izv., Phys. Solid Earth 48, 171–173 (2012). https://doi.org/10.1134/S1069351312010065

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  • DOI: https://doi.org/10.1134/S1069351312010065

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