Magnetic perturbations before the strong earthquakes |
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| Authors: | A V Guglielmi O D Zotov |
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| Institution: | 1.Schmidt Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia;2.Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth,Russian Academy of Sciences,Borok, Yaroslavl oblast,Russia |
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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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