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Remotely Registering Anomalous Variations in Lineament Systems of the Baikal Rift Zone during the M = 5.6 Earthquake of September 21, 2020

  • USE OF SPACE INFORMATION ABOUT THE EARTH STUDYING CATASTROPHIC NATURAL PROCESSES FROM SPACE
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Abstract

We present the results of studying anomalous variations in the lineament system during the preparation to the M = 5.6 earthquake that occurred on September 21, 2020, near Lake Baikal, 21 km from the settlement of Kultuk, at a depth of 10 km. The study method, based on the automated lineament analysis of satellite imagery, is described. Peculiarities of the Baikal rift zone structure and its seismic activity are analyzed. Schemes of hatch elongation lines, schemes of regional lineaments, and rose diagrams of lineaments are constructed on the basis of processed series of satellite imagery obtained by Terra (MODIS) in the period from May 25 to October 6, 2020. The total lengths of local lineaments and ratios of their lengths for various directions are calculated. All the data have allowed us to reveal anomalous variations in lineament systems 14 and 5 days before the earthquake of September 21, 2020. It is concluded that these anomalies are geodynamic precursors of the mentioned earthquake.

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Funding

This study was performed in ISR “AEROCOSMOS” in the framework of the project no. AAAA-A19-119081390037-2.

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Correspondence to V. G. Bondur.

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Translated by N. Astafiev

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Bondur, V.G., Gaponova, E.V. Remotely Registering Anomalous Variations in Lineament Systems of the Baikal Rift Zone during the M = 5.6 Earthquake of September 21, 2020. Izv. Atmos. Ocean. Phys. 57, 1012–1020 (2021). https://doi.org/10.1134/S0001433821090437

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