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Long-Range Anomalous Electromagnetic Effect Related to M9 Great Tohoku Earthquake

Received: 7 January 2015     Accepted: 14 January 2015     Published: 26 January 2015
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Abstract

It is supposed that prior to a large earthquake its focus may send through the Earth lithosphere a long-range effect of strain-related to transient electric signals, which in turn give rise to geomagnetic variations propagated over a wide range of frequencies. Consequently, to confirm long-range electromagnetic anomalous effect related to the M9 Great Tohoku earthquake occurred on 11 March 2011, we retrospectively analyzed the geomagnetic data collected at three observatories placed in Japan (Memambetsu, Kakioka) and Romania (Provita de Sus). The daily mean distributions of the normalized function Bzn and its standard deviation (STDEV) for all the three observatories are performed in the ultra-low frequency range (0.001-0.016Hz) by using the FFT band-pass filter analysis. Additionally, a comparative statistical analysis, based on a standardized random variable equation, was applied to the Bzn time series to emphasize a possible pre-seismic anomalous interval and, consequently, a peak greater than 2.5∙STDEV, related to the M9 Tohoku earthquake, was identified on 5-6 February 2011. The lead time was 32 days before the earthquake occurrence. The final conclusion is that the detection area of the pre-seismic electromagnetic effect could be extended to the considerable distances from the epicenter of a giant earthquake.

Published in Earth Sciences (Volume 4, Issue 1)
DOI 10.11648/j.earth.20150401.13
Page(s) 31-38
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Pre-Seismic Anomalous Bzn, Crustal Electrical Conductivity Changes, M9 Tohoku Earthquake

References
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  • APA Style

    Dragos Armand Stanica, Dumitru Stanica, Nicoleta Vladimirescu. (2015). Long-Range Anomalous Electromagnetic Effect Related to M9 Great Tohoku Earthquake. Earth Sciences, 4(1), 31-38. https://doi.org/10.11648/j.earth.20150401.13

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    ACS Style

    Dragos Armand Stanica; Dumitru Stanica; Nicoleta Vladimirescu. Long-Range Anomalous Electromagnetic Effect Related to M9 Great Tohoku Earthquake. Earth Sci. 2015, 4(1), 31-38. doi: 10.11648/j.earth.20150401.13

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    AMA Style

    Dragos Armand Stanica, Dumitru Stanica, Nicoleta Vladimirescu. Long-Range Anomalous Electromagnetic Effect Related to M9 Great Tohoku Earthquake. Earth Sci. 2015;4(1):31-38. doi: 10.11648/j.earth.20150401.13

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  • @article{10.11648/j.earth.20150401.13,
      author = {Dragos Armand Stanica and Dumitru Stanica and Nicoleta Vladimirescu},
      title = {Long-Range Anomalous Electromagnetic Effect Related to M9 Great Tohoku Earthquake},
      journal = {Earth Sciences},
      volume = {4},
      number = {1},
      pages = {31-38},
      doi = {10.11648/j.earth.20150401.13},
      url = {https://doi.org/10.11648/j.earth.20150401.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20150401.13},
      abstract = {It is supposed that prior to a large earthquake its focus may send through the Earth lithosphere a long-range effect of strain-related to transient electric signals, which in turn give rise to geomagnetic variations propagated over a wide range of frequencies. Consequently, to confirm long-range electromagnetic anomalous effect related to the M9 Great Tohoku earthquake occurred on 11 March 2011, we retrospectively analyzed the geomagnetic data collected at three observatories placed in Japan (Memambetsu, Kakioka) and Romania (Provita de Sus). The daily mean distributions of the normalized function Bzn and its standard deviation (STDEV) for all the three observatories are performed in the ultra-low frequency range (0.001-0.016Hz) by using the FFT band-pass filter analysis. Additionally, a comparative statistical analysis, based on a standardized random variable equation, was applied to the Bzn time series to emphasize a possible pre-seismic anomalous interval and, consequently, a peak greater than 2.5∙STDEV, related to the M9 Tohoku earthquake, was identified on 5-6 February 2011. The lead time was 32 days before the earthquake occurrence. The final conclusion is that the detection area of the pre-seismic electromagnetic effect could be extended to the considerable distances from the epicenter of a giant earthquake.},
     year = {2015}
    }
    

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    T1  - Long-Range Anomalous Electromagnetic Effect Related to M9 Great Tohoku Earthquake
    AU  - Dragos Armand Stanica
    AU  - Dumitru Stanica
    AU  - Nicoleta Vladimirescu
    Y1  - 2015/01/26
    PY  - 2015
    N1  - https://doi.org/10.11648/j.earth.20150401.13
    DO  - 10.11648/j.earth.20150401.13
    T2  - Earth Sciences
    JF  - Earth Sciences
    JO  - Earth Sciences
    SP  - 31
    EP  - 38
    PB  - Science Publishing Group
    SN  - 2328-5982
    UR  - https://doi.org/10.11648/j.earth.20150401.13
    AB  - It is supposed that prior to a large earthquake its focus may send through the Earth lithosphere a long-range effect of strain-related to transient electric signals, which in turn give rise to geomagnetic variations propagated over a wide range of frequencies. Consequently, to confirm long-range electromagnetic anomalous effect related to the M9 Great Tohoku earthquake occurred on 11 March 2011, we retrospectively analyzed the geomagnetic data collected at three observatories placed in Japan (Memambetsu, Kakioka) and Romania (Provita de Sus). The daily mean distributions of the normalized function Bzn and its standard deviation (STDEV) for all the three observatories are performed in the ultra-low frequency range (0.001-0.016Hz) by using the FFT band-pass filter analysis. Additionally, a comparative statistical analysis, based on a standardized random variable equation, was applied to the Bzn time series to emphasize a possible pre-seismic anomalous interval and, consequently, a peak greater than 2.5∙STDEV, related to the M9 Tohoku earthquake, was identified on 5-6 February 2011. The lead time was 32 days before the earthquake occurrence. The final conclusion is that the detection area of the pre-seismic electromagnetic effect could be extended to the considerable distances from the epicenter of a giant earthquake.
    VL  - 4
    IS  - 1
    ER  - 

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Author Information
  • Department of Electromagnetism and Lithosphere Dynamics, Institute of Geodynamics of the Romanian Academy, Bucharest, Romania

  • Department of Electromagnetism and Lithosphere Dynamics, Institute of Geodynamics of the Romanian Academy, Bucharest, Romania

  • Department of Electromagnetism and Lithosphere Dynamics, Institute of Geodynamics of the Romanian Academy, Bucharest, Romania

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