Abstract
Records of an IRIS broadband seismic station (AAK) deployed in the Tien Shan area were studied. An STS-1 seismometer made it possible to investigate ground motion velocity in the range of a few minutes. The result was to identify asymmetric anomalies in seismic noise that differ from Earth tidal variations. These indicate the effects of local tectonic processes during some time intervals. Several large earthquakes occurred near the seismic station during the days that the anomaly was observed. The seismic noise anomalies and statistically significantly earthquakes were found to be coincident with increased amplitudes of air pressure variations.
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ACKNOWLEDGMENTS
We are grateful to A.K. Rybin and N.A. Sycheva for weather data and the KNET earthquake catalog they let us use for the Geodynamic Test area of the Science Station operated by the Russian Academy of Sciences in Kirghizia.
Funding
This work was supported by the Russian Foundation for Basic Research, project no. 18-05-00026.
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Translated by A. Petrosyan
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Sobolev, G.A., Zakrzhevskaya, N.A. Local Tectonic Deformations and Nearby Contemporaneous Earthquakes. J. Volcanolog. Seismol. 14, 137–144 (2020). https://doi.org/10.1134/S0742046320030070
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DOI: https://doi.org/10.1134/S0742046320030070