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The Earth’s Crust Density Inhomogeneities and Stresses in the Central Kuriles

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Abstract

The gravity field stresses caused by density inhomogeneity of the Earth’s crust in the Central Kuriles area are calculated. The general spatial variation trend of the stress field and its local perturbations via structural and density differentiation of the Earth’s crust are revealed. We conclude that areas with gravitational instability exist within the crust. The hypocenters of the Simushir earthquakes of 2006–2007 were located in local perturbation areas of the stress field and gravitational instability, which could have contributed to the occurrence of these events.

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Funding

The study was performed within the framework of the Fundamental Research Program of the State Academies of Sciences for 2013–2020, p. 70, theme 3: “Spatio-temporal variations of the geophysical fields and their relationship with the structure, geodynamics, and seismotectonic processes in the lithosphere of the Far Eastern seas of Russia and their framing.”

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Authors and Affiliations

  1. Ilyichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia

    R. G. Kulinich, E. B. Osipova & M. G. Valitov

Authors
  1. R. G. Kulinich
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  2. E. B. Osipova
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  3. M. G. Valitov
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Corresponding authors

Correspondence to R. G. Kulinich, E. B. Osipova or M. G. Valitov.

Additional information

Recommended for publishing by V. B. Kaplun

Translated by N. Kovriga

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Kulinich, R.G., Osipova, E.B. & Valitov, M.G. The Earth’s Crust Density Inhomogeneities and Stresses in the Central Kuriles. Russ. J. of Pac. Geol. 14, 114–120 (2020). https://doi.org/10.1134/S1819714020020037

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  • DOI: https://doi.org/10.1134/S1819714020020037

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