Earthquake

Earthquake “doublets”-case studies for Kresna-Kroupnik (Bulgaria-M7.8) and Gaziantep–Kahramanmaraş (Turkey-M7.8)

 Boyko Ranguelov

Bulgarian Academy of Science and Arts – Sofia, Bulgaria

DOI: https://doi.org/10.59429/ear.v2i1.1882

Keywords: earthquake doublets (M7.8); comparative study; Bulgaria (1904); Turkey (2023).

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Abstract

This paper presents a comparative study for two couples of very strong seismic events-Bulgarian Kresna-Kroupnic seismic source activated during 4th April, 1904 (magnitudes 7.2 and 7.8) and those in Turkey 6th February 2023, Gaziantep and Kahramanmaraş seismic source (magnitudes 7.8 and 7.5) called “doublets”. The comparison includes main geophysical and seismological parameters and some social and post events consequences and characteristics. The study reveals similarities in the power and huge differences in the consequences of these seismic events occurred in different geodynamic and environmental conditions. Other studies are considered^{[20, 21]} related to strong seismic events and their consequences in other seismic active regions. Comparative tables are developed for easier and visual following of the similarities and differences, and detailed comparison and explanations are given in discussion to try to explain why these differences existed. Conclusions about the effects (social and practical issues) are derived and they could be useful in case of actual retrospective analysis for seismic zoning and for the future assessment of seismic hazard and risk.

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References

1. https://www.mindat.org/photo-1187573.html

2. https://www.Researchgate.Net/Publication/265077593_Seismic_Hazard_Assessment_For_Phase-I_Design_Hakkari_Dam_Turkey/figures?lo=1

3. https://www.hurriyetdailynews.com/fault-lines-crisscrossing-turkey-23606

4. Zagorchev I., Introduction to the geology of SW Bulgaria, GEOL. BALCANICA, 31. 1-2, Sofia, 2001, p. 3-52.

5. https://www.google.com/Bulgarian+tectonic+map

6. Sesetyan K., M. Stucchi, V. Castelli and A.A. Gomez Capera, 2023, Kahramanmaraş-Gaziantep Türkiye M7.7 Earthquake, 6 February 2023 (04:17 GMT+03:00). Large historical earthquakes of the earthquake-affected region: a preliminary report., (Ed. Boğaziçi University, Kandilli Observatory and Earthquake Research Institute, Department of Earthquake Engineering 12 pp.

7. https://www.emsc-csem.org/Earthquake/

8. Ranguelov, B., Rizhikova S. and Toteva T., 2001. The earthquake (M7.8) source zone (South-West Bulgaria), (Sofia: Bulgarian Academy of Sciences Pres) 279 pp.

9. Ranguelov B, Kisiov At, Dimovsky S, Spassov E, Krumova Y., Seismic Hazard Assessment of High Seismic Risk Located Setlements., Proc. SES 2022, 18th Int. Sci. Conf, Space, Ecology, Safety, 19th-21st October 2022, Sofia, Bulgaria

10. Lekkas, E., Carydis, P., Vassilakis, E., Mavroulis, S., Argyropoulos, I., Sarantopoulou, A., Mavrouli, M.,Konsolaki, A., Gogou, M., Katsetsiadou, K.-N., Kotsi, E., Spyrou, N.-I., Diakakis, M., Kranis, H., Skourtsos, E., Lozios, S., Soukis, K. (2023).The 6 February 6 2023 Turkey-Syria Earthquakes. Newsletter of Environmental, Disaster and Crises Management Strategies, 29, ISSN 2653-9454,DOI: 10.13140/RG.2.2.17643.82726 https://www.preventionweb.net/news/preliminary-report-february-6-2023-earthquakes-turkiye

11. Esra Cetin, Ziyadin Çakir, Mustapha Meghraoui, Semih Ergintav, Ahmet M. Akoglu

12. Extent and distribution of aseismic slip on the Ismetpaşa segment of the North Anatolian Fault (Turkey) from Persistent Scatterer InSAR, July 2014, Geochemistry, Geophysics, Geosystems 15(7), DOI: 10.1002/2014GC005307 https://www.researchgate.net/publication/263510481_Extent_and_distribution_of_aseismic_slip_on_the_Ismetpasa_segment_of_the_North_Anatolian_Fault_Turkey_from_Persistent_Scatterer_InSAR/figures?lo=1

13. Li, S. Wang, X. Tao, T. Zhu, Y. Qu, X. Li, Z. Huang, J. Song, S., 2023, Source Model of the 2023 Turkey Earthquake Sequence Imaged by Sentinel-1 and GPS Measurements: Implications for Heterogeneous Fault Behavior along the East Anatolian Fault Zone. Remote Sens. 2023, 15, 2618. https://doi.org/10.3390/rs15102618

14. M. Atanasova, Pl. Raykova, H. Nikolov., 2023, Determining The Deformations of The Earth’S Surface After the Earthquakes in Turkey-Syria of 06 February 2023-Initial Results. Compt. Rend. De L’Acad.Bulg.Sci.Tome 76, No 4, 2023.

15. Ranguelov B., T. van Eck, G. Papadopoulos, S. Pavlides, S.Shanov, V. Shenk., Initial data for the magnitude reevaluation of the strong earthquakes during 1904 in Kresna-Kroupnik zone (SW Bulgaria). In. Reports on Geodesy., No4 (49), 2000, Warsaw, pp. 50-55.

16. Ranguelov, B., 2011. Natural Hazards-Nonlinearities and assessment. (Sofia: Bulgarian Academy of Sciences Pres) 327 pp.

17. Watzof S. 1905. Tremblements de terre en Bulgarie, N0 5, Sofia, 280pp.

18. Grigorova, E. and B. Grigorov. 1964 Epicenters and seismic lineaments in Bulgaria. In Bulgarian with a French summary

19. https://frankhoogerbeets.com/

20. Rosenthal, E. 1907. Katalog der in jare 1904 registrierten seismischen storungen. Strasburg, Publ. du BCAIS, 5-6.

21. Ansari, A., Zaray, A. H., Rao, K. S., Jain, A. K., Hashmat, P. A., Ikram M. K., & Wahidi, A. W. (2023). Reconnaissance surveys after June 2022 Khost earthquake in Afghanistan: Implication towards seismic vulnerability assessment for future design. Innovative Infrastructure Solutions, 8(3), 1-15. https://doi.org/10.1007/s41062-023-01077-x

22. Ansari A., Zahoor F., Rao K., Jain A. (2022). Liquefaction hazard assessment in a seismically active region of Himalayas using geotechnical and geophysical investigations: a case study of the Jammu Region., Bulletin of Engineering Geology and the Environment, 81:349, https://doi.org/10.1007/s10064-022-02852-3