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Analysis of the Block-Fault Structure Dynamics in the Area of Earthquakes in 2008 and 2020 near Southern Lake Baikal by the Methods of Satellite Radiointerferometry

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Abstract

The displacements of the Earth’s surface before and after the earthquakes that took place near the southern shore of Lake Baikal on September 21, 2020 (Bystrinskoe earthquake with a magnitude of M = 5.5), and August 27, 2008 (Kultukskoye earthquake with a magnitude of M = 6.3), were analyzed using satellite radar interferometry methods. Remote sensing data obtained by the Sentinel-1B (C-band) and the ALOS-1/2 PALSAR-1/2 (L-band) spaceborne synthetic aperture radars were used to study deformation processes. Blocks with different strain rates were found based on the results of analysis of satellite radar interferometric measurements for the period from May 2017 to October 2020 for the Bystrinskoe earthquake and from January 2007 to February 2011 for the Kultukskoe earthquake. The difference in the deformation values before the Bystrinskoe earthquake was 14 mm and that before the Kultukskoe earthquake ranged from 12 to 13 mm.

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ACKNOWLEDGMENTS

The authors are grateful to the Japanese Aerospace Agency (JAXA) for the ALOS-1/2 PALSAR-1/2 data provided as part of the ALOS-2 RA6 (PI-3402) project.

Funding

This work was carried out within the framework of a State Assignment of the Ministry of Science and Higher Education of the Russian Federation for the Institute of Physical Materials Science, Siberian Branch, Russian Academy of Sciences, Institute of Geology, Siberian Branch, Russian Academy of Sciences, and the AEROCOSMOS Research Institute (project no. AAAA-A19-119081390037-2).

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Authors and Affiliations

  1. AEROCOSMOS Research Institute for Aerospace Monitoring, Moscow, Russia

    V. G. Bondur & T. N. Chimitdorzhiev

  2. Institute of Physical Materials Science, Siberian Branch, Russian Academy of Sciences, 670047, Ulan-Ude, Russia

    T. N. Chimitdorzhiev, A. V. Dmitriev & P. N. Dagurov

  3. Geological Institute, Siberian Branch, Russian Academy of Sciences, 670047, Ulan-Ude, Russia

    Ts. A. Tubanov

Authors
  1. V. G. Bondur
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  2. T. N. Chimitdorzhiev
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  3. Ts. A. Tubanov
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  4. A. V. Dmitriev
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  5. P. N. Dagurov
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Corresponding author

Correspondence to V. G. Bondur.

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Translated by M. Hannibal

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Bondur, V.G., Chimitdorzhiev, T.N., Tubanov, T.A. et al. Analysis of the Block-Fault Structure Dynamics in the Area of Earthquakes in 2008 and 2020 near Southern Lake Baikal by the Methods of Satellite Radiointerferometry. Dokl. Earth Sc. 499, 648–653 (2021). https://doi.org/10.1134/S1028334X21080031

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