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Examples of Simultaneous Appearance of Deformations of the Earth’s Crust with Hour-long Period and Earthquakes

  • SEISMOLOGY
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Abstract

Records from broadband seismic station AAK located on Kirgiz Ridge, Tien Shan, are presented. The episodes of discrepancy between tectonic displacements and tidal oscillations are registered and compared with the timing of local earthquakes of energy class of K > 11 which occurred during 2000–2018. Several times the tectonic anomalies and the earthquakes occurred on the same day. Comparison with the meteorological data is carried out. The following physical mechanism of this phenomenon is suggested. The records of the broadband seismic station reflect gravity variations and vertical ground deformations caused by the displacements of air masses. This process initiates slow movements and earthquakes near unstable faults.

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ACKNOWLEGMENTS

The author is grateful to A.K. Rybin and N.A. Sycheva for providing meteorological data and the KNET seismological catalog of the territory of the Geodynamic test site of the Research Station, Russian Academy of Sciences, in Kyrgyzstan.

Funding

This work was supported by the Russian Foundation for Basic Research, project no. 18-05-00026.

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Authors and Affiliations

  1. Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, 123995, Moscow, Russia

    G. A. Sobolev

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  1. G. A. Sobolev
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Correspondence to G. A. Sobolev.

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Translated by M. Hannibal

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Sobolev, G.A. Examples of Simultaneous Appearance of Deformations of the Earth’s Crust with Hour-long Period and Earthquakes. Dokl. Earth Sc. 491, 164–167 (2020). https://doi.org/10.1134/S1028334X20030198

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  • DOI: https://doi.org/10.1134/S1028334X20030198

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