Abstract
The instrumental monitoring reveals an autowave nature of ice deformation behavior prior to ice shocks. A few minutes or the first tens of minutes before the shock, this process shows an increase in the amplitude of oscillations, often with a multi-fold reduction in their period. An autowave dynamics of ice deformations is due to self-organization of a structurally heterogeneous ice environment under critical conditions. The self-organization ability of the deformation process is confirmed by the results of ice deformation time series processing by the structural function curvature analysis method (SFCAM) and by the Lomb-Scargle periodogram method. The results of seismic monitoring of ice showed that autowave processes are characterized by constant frequency of 0.1 Hz. Taking into account the ice deformation and microseismic fluctuation features preceding the ice shocks, spectral analysis was performed on the data of deformation and seismicity monitoring at the Buguldeika geodynamic polygon before the Kudara earthquake. According to the results, 14 hours before the earthquake the seismogram recorded a gradual increase in auto-oscillation amplitudes in the frequency range from 0.01 to 0.1 Hz. The maximum amplitude increase is 19.5 against the background.
This is a preview of subscription content, log in via an institution to check access.
REFERENCES
N. L. Dobretsov, S. G. Psakh’e, V. V. Ruzhich, V. L. Popov, E. V. Shil’ko, N. G. Granin, V. Yu. Timofeev, S. V. Astafurov, A. V. Dimaki, and Ya. Starche-vich, Dokl. Earth Sci. 413 (2), 155–159 (2007).
S. G. Psakhie, E. V. Shilko, S. V. Astafurov, A. V. Dimaki, V. V. Ruzhich, and A. Yu. Panchenko, Fiz. Mezomekh. 11 (1), 55–65 (2008).
V. V. Ruzhich, S. G. Psakhie, E. N. Chernykh, S. A. Bornyakov, and N. G. Granin, Russ. Geol. Geophys. 50 (3), 214–221 (2009).
D. V. Salko and S. A. Bornyakov, Pribory, No. 6, 24–28 (2014).
H. Haken, Synergetics. An Introduction (Springer-Verlag, Berlin, Heidelberg, 1983).
I. Prigogine and D. Kondepudi, Modern Thermo-dynamics. From Heat Engines to Dissipative Structures (John Wiley, 1998).
G. A. Sobolev and A. V. Ponomarev, The Physics of Earthquakes and Earthquake Precursors (Nauka, Moscow, 2003) [in Russian].
A. Pralong, Nonlinear Processes Geophys. 13, 681–683 (2006).
G. V. Vstovsky, Mater. Sci. 12, 262–270 (2006).
N. R. Lomb, Astrophys. Space Sci. 39, 447–462 (1976). https://doi.org/10.1007/BF00648343
J. D. Scargle, Astrophys. J. 263, 835–853 (1982).
J. D. Scargle, Astrophys. J. 343, 874–887 (1989). https://doi.org/10.1086/167757
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
Rights and permissions
About this article
Cite this article
Bornyakov, S.A., Dobrynina, A.A., Shagun, A.N. et al. On Similarities between Deformation Processes Preceding Ice Shocks and Tectonic Earthquakes. Dokl. Earth Sc. 508, 91–96 (2023). https://doi.org/10.1134/S1028334X22602097
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028334X22602097