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Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes

Cilt: 31 29 Nisan 2026
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Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes

Öz

Tendürek Volcano is one of the Quaternary volcanic edifices in Eastern Anatolia. Its volcanic activity has been directly controlled by active regional tectonics since the Late Miocene. In and around Tendürek Volcano, several tectonic units are present, including the Tendürek Fault with a normal fault component and the Balıkgölü Fault Zone with a strike-slip fault component. Both the faults and the volcano are capable of generating local seismicity in the region. In this study, 22 low-magnitude seismic events (ML ≤ 2.6) that occurred around Tendürek Volcano were selected to identify and interpret the source of regional seismicity. Focal mechanism solutions for these events were determined using the FPFIT and PINV algorithms, and Coulomb stress changes were calculated from the focal mechanism solutions at different depths. The results, integrated with focal mechanism solutions and Coulomb stress modeling, indicate that positive stress values are concentrated beneath the volcano at shallow depths and extend westward and northeastward across the study area. Ultimately, these findings provide crucial insights into the structural characteristics of the volcanic environment and its interaction with local tectonics.

Anahtar Kelimeler

Tendürek Volcano, Focal Mechanism, Stress Change, Seismicity

Etik Beyan

The authors of this article declare that they adhered to research and publication ethics in their work. The authors declare that the materials and methods used in this study did not require ethics committee approval and/or specific legal permission.

Teşekkür

Some images were prepared using the GMT package program (Wessel et al., 2019). The Coulomb stress map was created with the Coulomb 3.3 package (Toda et al., 2011). Tectonic structures were taken from Emre et al. (2018). Earthquake catalogs were supplied by Disaster and Emergency Management Presidency (AFAD) and Boğaziçi University, Kandilli Observatory and Research Institute (KOERI).

Kaynakça

  1. AFAD. (2025). Disaster and Emergency Management Authority. Erişim tarihi: 25.08.2025. https://deprem.afad.gov.tr/event-catalog
  2. Akın, U., Ulugergerli, E. U., & Kutlu, S. (2014). The assessment of geothermal potential of Turkey by means of heat flow estimation. Bulletin of the Mineral Research and Exploration, 149(149), 201-210. https://doi.org/10.19111/bmre.58938
  3. Alkan, H. (2022). Crustal structure in and around the East Anatolian volcanic belt by using receiver functions stacking. Journal of African Earth Sciences, 191, 104532. https://doi.org/10.1016/j.jafrearsci.2022.104532
  4. Alkan, H., & Bayrak, E. (2022). Coulomb stress changes and magnitude-frequency distribution for Lake Van region. Bulletin of the Mineral Research and Exploration, 168(168), 141-156. https://doi.org/10.19111/bulletinofmre.990666
  5. Alkan, H., Öztürk, S., & Akkaya, İ. (2023). Seismic Hazard Implications in and Around the Yedisu Seismic Gap (Eastern Türkiye) Based on Coulomb Stress Changes, b-Values, and S-wave Velocity, Pure and Applied Geophysics, 180 (9), 3227-3248.
  6. Alkan, H., Büyüksaraç, A., & Bektaş, Ö. (2024). Investigation of earthquake sequence and stress transfer in the Eastern Anatolia Fault Zone by Coulomb stress analysis. Turkish Journal of Earth Sciences, 33(1), 56-68. https://doi.org/10.55730/1300-0985.1898
  7. Alkan, A. (2026). Investigation of Coulomb Stress Changes of Microearthquakes in the vicinity of Tendürek Volcano using Focal Mechanism Solutions. (MSc), Yuzuncu Yıl University, Institute of Natural and Applied Science, Van, Turkey.
  8. Asayesh, B. M., Zafarani, H., & Tatar, M. (2020). Coulomb stress changes and secondary stress triggering during the 2003 (Mw 6.6) Bam (Iran) earthquake. Tectonophysics, 775, 228304. https://doi.org/10.1016/j.tecto.2019.228304
  9. Bathke, H., Sudhaus, H., Holohan, E. P., Walter, T. R., & Shirzaei, M. (2013). An active ring fault detected at Tendürek volcano by using InSAR. Journal of Geophysical Research: Solid Earth, 118(8), 4488-4502. https://doi.org/10.1002/jgrb.50305
  10. Bathke, H., Nikkhoo, M., Holohan, E. P., & Walter, T. R. (2015). Insights into the 3D architecture of an active caldera ring-fault at Tendürek volcano through modeling of geodetic data. Earth and Planetary Science Letters, 422, 157 168. https://doi.org/10.1016/j.epsl.2015.03.041

Kaynak Göster

APA
Alkan, A., Akkaya, İ., & Alkan, H. (2026). Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes. Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 31, 108-125. https://doi.org/10.53433/yyufbed.1793064
AMA
1.Alkan A, Akkaya İ, Alkan H. Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes. YYUFBED. 2026;31:108-125. doi:10.53433/yyufbed.1793064
Chicago
Alkan, Ayşegül, İsmail Akkaya, ve Hamdi Alkan. 2026. “Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes”. Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi 31 (Nisan): 108-25. https://doi.org/10.53433/yyufbed.1793064.
EndNote
Alkan A, Akkaya İ, Alkan H (01 Nisan 2026) Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes. Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi 31 108–125.
IEEE
[1]A. Alkan, İ. Akkaya, ve H. Alkan, “Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes”, YYUFBED, c. 31, ss. 108–125, Nis. 2026, doi: 10.53433/yyufbed.1793064.
ISNAD
Alkan, Ayşegül - Akkaya, İsmail - Alkan, Hamdi. “Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes”. Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi 31 (01 Nisan 2026): 108-125. https://doi.org/10.53433/yyufbed.1793064.
JAMA
1.Alkan A, Akkaya İ, Alkan H. Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes. YYUFBED. 2026;31:108–125.
MLA
Alkan, Ayşegül, vd. “Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes”. Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi, c. 31, Nisan 2026, ss. 108-25, doi:10.53433/yyufbed.1793064.
Vancouver
1.Ayşegül Alkan, İsmail Akkaya, Hamdi Alkan. Investigating the Origin of Microearthquakes around Tendürek Volcano (Eastern Türkiye) using Focal Mechanism Solutions and Stress Changes. YYUFBED. 01 Nisan 2026;31:108-25. doi:10.53433/yyufbed.1793064