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CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021

Year 2022, Volume: 21 Issue: 1, 25 - 33, 30.06.2022

Sabina Kazimova

Abstract

The article examines the seismotectonic position of a strong earthquake that occurred on the territory of the Azerbaijan part of the Greater Caucasus for the period 2012-2021. In Bali, the focal mechanisms of strong earthquakes were analyzed: Zagatala on May 7, 2012 with Мl=5.6, 5.7, Balakan on October 14, 2012 with Мl=5.8,; Ismayilli 07.10.2012, 2019, 2021 with Ml=5.1-5.3; Gabala series on September 29 and October 4, 2014 with Мl=5.5; as well as Okhuz on 09/04/2015. The analysis showed that as a result of dynamic stresses in the ZakatalGabala and Balakan-Okhuz-Ismayilli regions, in the first case, initiated seismicity was observed, and in the second - no. Based on this, an assumption arose that the faults on which initia ted earthquakes occur must be in a subcritical, metastable state. It was found that the spatial position of the earthquake epicenters (aftershock field) that occurred from 2012 to 2021 correlates with the zones of positive increments of critical Coulomb stresses. Their occurrence, apparently, is associated with the accumulation of tectonic stresses of sublatitudinal extension and the localization of static stresses initiated by the Zakatala earthquakes of 2012, which together led to the emergence of instability and shear movements along the fault.

Keywords

earthquake focal mechanisms Coulomb stress aftershock field.

References

  • 1. Babayev G., Yetirmishli G., Kazimova S., Kadirov F., Telesca L. Stress field pattern inthe Northeastern part of Azerbaijan // Pure and Applied Geophysics, on-line, 201
  • 2. Das S. and Scholz C. H. Off-fault aftershock clusters caused by shear stress increase,Bull. Seismol.Soc. Amer., 1983, Vol. 71, No. 5. — P. 1669 – 1675. 20.
  • 3. King G. C. P., Stein R. S., and Lin J. Static stress changes and the triggering ofearthquakes, Bul.Seismol. Soc. Amer., 1994, Vol. 84, No. 1., Р. 935 – 953.
  • 4. Lin J., Stein R.S. Stress Triggering in Thrust and Subduction Earthquakes and StressInteraction between the Southern San Andreas and Nearby Thrust and Strike-slip Faults // J. Geophys. Res. 2004. V. 109. P. B02303. 14.
  • 5. Lutikov A.I., Kuchay M.S. Seismicity time variation in the areas of occurrence a number of strong earthquakes in the North Caucasus // J. Earthquake Prediction Res. 1998. - Vol. 7, No. l.-P. 76-82.
  • 6. Stein R.S. The role of stress transfer in earthquake occurrence // Nature. 1999. -Vol. 402. - P. 605-609.
  • 7. Toda Shinji, Stein R.S., Sevilgen Volkan, and Lin Jian, 2011, Coulomb 3.3 Graphic - rich deformation and stress-change software for earthquake, tectonic, and volcano research and teaching - user guide: U.S. Geological Survey Open-File Report 2011– 1060, 63 p.
  • 8. USGS National Earthquake Information Center, PDE. https://earthquake.usgs.gov/earthquakes/eventpage/usp0009xws/moment-tensor.
  • 9. Кенгерли Т.Н., Особенности геолого-тектонического строения юго-восточного Кавказа и вопросы нефтегазоносности, Elmi əsərlər, №9, Гос. Нефт. Компания Респ. Азербайджан, 2007 г., с. 3-12.
  • 10. Кондорская Н.В., Шебалин Н.В. Новый каталог сильных землетрясений на территории СССР. Наука, Москва, 1977.
  • 11. Коновалов А.В. Система алгоритмов для определения параметров слабых землетрясений по записям цифровых сейсмических станций на примере юга Сахалина, Док. Диссертация, 2006, 79 с.
  • 12. Рзаев А.Г., Eтирмишли Г.Дж, Казымова С.Э., Отражение геодинамического режима в вариациях напряженности геомагнитного поля (на примере южного склона Большого Кавказа) Известия, Науки о Земле. Баку 2013, № 4., с. 3-15
  • 13. Ризниченко Ю.В. О сейсмическом течении горных масс // Динамика земной коры. -М., 1965.-С.5-12.
  • 14. Хаин В.Е., Ак.А.Ализаде, Геология Азербайджана, Том IV Тектоника, ред. 2005.Баку, Из-во Nafta-Press, С. 214-234.
  • 15. Шихалибейли Э.Ш. Некоторые проблемные вопросы геологического строения и тектоники Азербайджана. Баку: Элм, 1996. 215с.
  • 16. Юнга СЛ. Методы и результаты определения сейсмотектонической деформации.-М.: Наука, 1990. 191 с.
There are 16 citations in total.

Details

Primary Language English
Subjects Seismology and Seismic Exploration, Geophysics (Other)
Journal Section Research Article
Authors

Sabina Kazimova

Publication Date June 30, 2022
Published in Issue Year 2022 Volume: 21 Issue: 1

Cite

APA Kazimova, S. (2022). CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021. Seismoprognosis Observations in the Territory of Azerbaijan, 21(1), 25-33.
AMA Kazimova S. CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021. Seismoprognosis Observations in the Territory of Azerbaijan. June 2022;21(1):25-33.
Chicago Kazimova, Sabina. “CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021”. Seismoprognosis Observations in the Territory of Azerbaijan 21, no. 1 (June 2022): 25-33.
EndNote Kazimova S (June 1, 2022) CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021. Seismoprognosis Observations in the Territory of Azerbaijan 21 1 25–33.
IEEE S. Kazimova, “CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021”, Seismoprognosis Observations in the Territory of Azerbaijan, vol. 21, no. 1, pp. 25–33, 2022.
ISNAD Kazimova, Sabina. “CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021”. Seismoprognosis Observations in the Territory of Azerbaijan 21/1 (June2022), 25-33.
JAMA Kazimova S. CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021. Seismoprognosis Observations in the Territory of Azerbaijan. 2022;21:25–33.
MLA Kazimova, Sabina. “CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021”. Seismoprognosis Observations in the Territory of Azerbaijan, vol. 21, no. 1, 2022, pp. 25-33.
Vancouver Kazimova S. CHANGES IN COULOMB STRESSES AFTER STRONG EARTHQUAKES OCCURRED IN THE TERRITORY OF THE GREATER CAUCASUS FOR THE PERIOD 2012-2021. Seismoprognosis Observations in the Territory of Azerbaijan. 2022;21(1):25-33.
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