Macroseismic assessment of the Kosh-Agach earthquake in the Russian Federation

Authors

  • Altanjuldiz Torekhaan Gobi-Altai branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0009-0003-6465-4687
  • Baasansuren Shurkhuu Bayan-Ölgii branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
  • Lkhaijav Dorlig Ulaangom branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
  • Janbolat Madeniet Bayan-Ölgii branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia

DOI:

https://doi.org/10.5564/mjag.v12i1.5184

Keywords:

Earthquake, Macroseismic study, Intensity assessment, MSK-64 scale, Geology, Geomorphology

Abstract

On 15 February 2025, at T0=01:48:18:00  UTC (08:48 local time), a strong earthquake with a magnitude of 6.4 occurred 20 km southeast of Kosh-Agash, Southern Siberia, Russia (49.87°N, 88.84°E). The earthquake was felt across the western regions of Mongolia, including Bayan-Ölgii, Uvs, and Khovd provinces, highlighting the need to assess the regional seismic impact and the spatial distribution of ground shaking. The objective of this study is to evaluate the macroseismic intensity of the event and to determine the patterns of seismic shaking distribution. A total of 758 primary macroseismic observations were collected using a standard MSK-64 questionnaire-based survey and subjected to statistical analysis. The results indicate that the spatial distribution of seismic intensities is closely correlated with regional geological structures, soil properties, seismic wave propagation, and attenuation characteristics. This study provides scientifically based information that can contribute to improving regional earthquake hazard assessment and planning for disaster risk reduction.

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Published

2025-12-30

How to Cite

Torekhaan, A., Shurkhuu, B., Dorlig, L., & Madeniet, J. (2025). Macroseismic assessment of the Kosh-Agach earthquake in the Russian Federation. Mongolian Journal of Astronomy and Geophysics, 12(1), 113–118. https://doi.org/10.5564/mjag.v12i1.5184

Issue

Vol. 12 No. 1 (2025)

Section

Data Papers

License

Copyright (c) 2025 Altanjuldiz Torekhaan, Janbolat Madeniet, Shurkhuu Baasansuren, Lkhaijav Dorlig

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