Abstract
The work continues the study of interrelations between strong flare-induced magnetic storms and variations of seismicity. Using data on the time dependences of the parameters of seismic noise (average level and root mean squared (RMS)), recorded by stations of the KNET seismic network during monitoring of the territory of Bishkek geodynamic site (North Tien Shan). The presented results indicate the high sensitivity of the seismic noise in the frequency range of 10–20 Hz to external and, in particular, electromagnetic effects in comparison to the seismic activity. We noted the manifestations of the effects of magnetic storms that occurred after strong and super-strong solar flares in 2000–2006. These were short-term increases in the RMS of seismic noise, preceding changes in the accumulation rate of the number of events. The obtained results agree with conclusions about the interrelation between seismicity and magnetic storms. A model is suggested to describe one of the possible mechanisms by which the electromagnetic pulses and the currents induced by them in a medium devoid of piezoelectric properties influence the seismic process.
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Original Russian Text © N.A. Sycheva, L.M. Bogomolov, V.N. Sychev, 2011, published in Fizika Zemli, 2011, No. 3, pp. 55–71.
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Sycheva, N.A., Bogomolov, L.M. & Sychev, V.N. On geoeffective solar flares and variations of the seismic noise level. Izv., Phys. Solid Earth 47, 207–222 (2011). https://doi.org/10.1134/S1069351310101027
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DOI: https://doi.org/10.1134/S1069351310101027