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Feng Lili. 2019: Lithospheric geomagnetic field variation in the North-South Seismic Belt from 2010 to 2016. Acta Seismologica Sinica, 41(2): 239-248. DOI: 10.11939/jass.20180059
Citation: Feng Lili. 2019: Lithospheric geomagnetic field variation in the North-South Seismic Belt from 2010 to 2016. Acta Seismologica Sinica, 41(2): 239-248. DOI: 10.11939/jass.20180059
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Lithospheric geomagnetic field variation in the North-South Seismic Belt from 2010 to 2016

  • Qinghai Earthquake Agency，Xining 810001，China

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  • Received Date: April 26, 2018
  • Revised Date: October 30, 2018
  • Available Online: February 24, 2019
  • Published Date: February 28, 2019
    Graphical Abstract
    • Abstract
  • This paper processed six issues of annual variation data of lithospheric magnetic field from 2010 to 2016 in the North-South Seismic Belt （21°N−37°N, 97°E−109°E） by using wavelet decomposition, and systematically analyzed the annual variation of lithospheric magnetic field in epicenters of strong earthquakes （MS≥5.0） since June of 2011. The results show that correlative coefficients between earthquake magnitude and lithospheric magnetic field components ΔX, ΔY, ΔZ are 0.26, −0.26, 0.15, respectively, which means there is no significant correlation between the two parameters; the maximum variation amplitude of lithospheric magnetic field components ΔX, ΔY, ΔZ in the epicenters of strong earthquakes are 18.46, 14.98, −15.54 nT, respectively. The wavelet decomposition results show that there is significant variation on basic layers with maximum scale of one thousand kilometers in two years before MS7.0 earthquakes, and significant variation also appears on basic layer in one year before MS6.0 earthquakes, but the scale is smaller; as to before MS5.0 earthquakes, no significant anomalies have been found on basic layer or middle layer.
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