Advertisement

Journal of Seismology

, Volume 14, Issue 3, pp 445–456 | Cite as

Source parameters for the Mw = 6.6, 03 February 2002, Çay Earthquake (Turkey) and aftershocks from GPS, Southwestern Turkey

  • Bahadır Aktuğ
  • Bülent Kaypak
  • Rahmi Nurhan Çelik
Original article

Abstract

The 03 February 2002 Çay Earthquake (Mw ∼6.7) occurred on the fault segment between Eber and Akşehir Lakes followed by a large aftershock (Mw ∼5.6) near the western end of the fault and two sequential aftershocks. We computed the coseismic surface displacements from static GPS measurements to determine the fault geometry parameters and uniform slip components. The coseismic displacements were obtained through combining the regional pre-earthquake and post-earthquake GPS data. Fault geometry and slips were acquired through the inversion of GPS data modeling the events as elastic dislocations in a half-space and assuming all four events took place on the same fault plane. Results suggest that one-segment fault of ∼33 km length and dipping ∼43° northward suffices to model the dislocation, assuming uniform slip distribution with 0.51 m dip slip, 0.26 m left-lateral slip extending to a depth down to ∼11.5 km which is consistent with seismological evidence. The results also verify the normal faulting in the eastern flank of Isparta Angle which has long been assumed as a thrusting structure. While the available data cannot identify the four individual events on the same day, an attempted distributed slip model differentiates dip slip and left-lateral slips near the hypocenter with maximum values of ∼1 and 0.6 m, respectively.

Keywords

GPS Dislocation Çay Earthquake Inversion Slip distribution 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aktuğ B (2006) Determination of earthquake source parameters from geodetic measurements. PhD dissertation, Institute of Science, İstanbul Technical UniversityGoogle Scholar
  2. Ambraseys NN (1988) Engineering seismology. J Earth Eng Struct Dyn 17:1–105CrossRefGoogle Scholar
  3. Ambraseys NN, Finkel CF (1987) Seismicity of Turkey and neighbouring regions, 1899–1915. Ann Geophys 5B(6):701–726Google Scholar
  4. Ayhan ME, Bürgmann R, McClusky S, Lenk O, Aktuğ B, Herece E, Reilinger RE (2001) Kinematics of the Mw = 7.2, 12 November 1999, Düzce, Turkey Earthquake. Geophys Res Lett 28(2):367–370CrossRefGoogle Scholar
  5. Barka A, Reilinger RE, Şaroğlu F, Şemgöre AMC (1995) Isparta Angle: its importance in the neotectonics of the Eastern Mediterranean Region. International Earth Science Colloquium on the Aegean Region, pp 3–18Google Scholar
  6. Blumental MM (1963) Le system structurale du Taurus subanatolien. Livre de Memoire du Professeur Paul Fallot, 2, Soc. Geol. Fr. tome, pp 611–662Google Scholar
  7. Boray A, Şaroğlu F, Emre Ö (1985) Evidence for E-W shortening in the north of Isparta Angle. Jeoloji Mühendisliği 23:9–20Google Scholar
  8. Demirtaş R, İravul Y, Yaman M (2003) 03 Şubat 2002 Eber ve Çay Depremleri, Afet İşleri Genel Müdürlüğü, Deprem Araştırma Dairesi Başkanlığı, Rapor No: 006, Ankara. (http://Sismo.Deprem.Gov.Tr/Turknet/Raporlar/Eberson.pdf)
  9. Dewey JF, Şengör AMC (1979) Aegean and surrounding regions: complex multiplate and continuum tectonics in a convergent zone. Geol Soc Am Bull 90:84–92CrossRefGoogle Scholar
  10. Dinç AN (2003) Determination of 3-D P-wave velocity structure beneath Sultandağı region by local earthquake tomography. MSc thesis (in Turkish), 77pp, İstanbul Technical University, TurkeyGoogle Scholar
  11. Emre Ö, Duman YT, Dogan A, Özalp S, Tokay F, ve Kusçu İ (2002) “3 Subat 2002 Sultandağ Depremi Ön Raporu” http://www.mta.gov.tr/deprem/afyon.asp
  12. Emre Ö, Duman TY, Doğan A, Özalp S, Tokay F, Kusçu İ (2003) Surface faulting associated with Sultandağı Earthquake (Mw6.5) of 3 February 2002, Southwestern Turkey. Seismol Res Lett 74:4Google Scholar
  13. Erdik M, Sesetyan K, Demircioglu MB, Celep U, Biro Y, Uckan E (2002) Sultandağı Earthquake—Turkey, Report by the Department of Earthquake Engineering, Kandilli Obs. and Earthquake Res. Ins., Bogazici UniversityGoogle Scholar
  14. Feigl KL, Sarti F, Vadon H, McClusky S, Ergintav S, Durand P, Bürgmann R, Rigo A, Massonet D, Reilinger RE (2002) Estimating slip distribution for the İzmit mainshock from coseismic GPS, ERS-I, RADAR-SAT and SPOT measurements. Bull Seismol Soc Am 92(1):138–160CrossRefGoogle Scholar
  15. Gökten E, Seyitoğlu G, Varol B, Işık V (2003) 03.02.2002 The mechanism of the 03.02.2002 Çay (Afyon) earthquake; the seismic potential of the region: Kocaeli Univ. Earthquake Symp. 12–14 March, KocaeliGoogle Scholar
  16. Jackson JA, McKenzie DP (1984) Active tectonics of Alpine–Himalayan Belt between western Turkey and Pakistan. Geopys J R Astron Soc 77:185–265Google Scholar
  17. Kirkpatrick S, Gelatt CD Jr, Vecchi MP (1983) Optimization by simulated annealing. Science 220(4598):671–680CrossRefGoogle Scholar
  18. Koçyiğit A, Özacar A (1984) A new intracontinental tectonic regime in southwest Turkey and its close vicinity. Geol Soc Turkey Bull 27:1–16Google Scholar
  19. Koçyiğit A, Özacar A (2003) Extensional neotectonic regime through the NE edge of outer Isparta Angle, SW Turkey: new field and seismic data. Turk J Earth Sci 12:67–90Google Scholar
  20. Koçyiğit A, Bozkurt E, Kaymakçı N, Şaroğlu F (2002) 3 şubat 2002 Çay (Afyon) Depreminin Kaynağı ve Ağır Hasarların Nedenleri: Akşehir Fay Zonu, Jeolojik Ön Rapor, Ortadoğu Teknik Üniversitesi Mühendislik Fakültesi Jeoloji Mühendisliği Tektonik Araştırma Birimi, Ankara. (http://www.Metu.Edu.Tr/Akoc/Afyon.pdf)
  21. Koral H, Yılmaz M (2003) The Çay–Eber Earthquake (Feb. 3, 2002; Mw = 6.2), Western Turkey: a review in geological context, International Conference on Earth Sciences and Electronics—2003 (ICESE-2003)Google Scholar
  22. McClusky S, Balasdsanian S, Barka A, Demir C, Georgiev I, Hamburger M, Hurst K, Kastens KG, Kekelidze RK, Kotzev V, Lenk O, Mahmoud S, Mishin A, Nadariya M, Ouzounis A, Paradissis D, Peter Y, Prilepin M, Reilinger R, Sanli I, Seeger H, Tealeb A, Toksoz MN, Veis G (2000) Global Positioning System constraints on crustal movements and deformations in the Eastern Mediterranean and Caucasus. J Geophys Res 105:5695–5719Google Scholar
  23. Nurlu M, Kuterdem K (2002) Tectonic Investigation of February 03, 2002 Çay (Afyon) Earthquake, Earthquake Research Department, Internal Report, General Directorate of Disaster Affairs, AnkaraGoogle Scholar
  24. Öcal N (1968) Türkiyenin Sismisitesi ve Zelzele Cografyasi, Milli Eğitim Bakanlığı, İstanbul Kandilli Rasathanesi ve Sismoloji Yayınları, 7, İstanbul, 119 pGoogle Scholar
  25. Okada Y (1985) Surface deformation due to shear and tensile faults in a halfspace. Bull Seismol Soc Am 75:1135–1154Google Scholar
  26. Özer N (2006) New information on earthquake history of the Aksehir–Afyon Graben System, Turkey, since the second half of 18th century. Nat Hazards Earth Syst Sci 6:1017–1023CrossRefGoogle Scholar
  27. Pınar N, Lahn E (1952) Türkiye Depremleri Izahli Katalogu, Bayındırlık Bakanlığı, Yapı ve İmar İşleri Reisliği, 36, 6, Ankara, 153 pGoogle Scholar
  28. Reilinger RE, Ergintav S, Bürgmann R, McClusky S, Lenk O, Barka A, Gürkan O, Hearn L, Feigl KL, Cakmak R, Aktug B, Ozener H, Toksöz MN (2000) Coseismic and postseismic fault slip for the 17 August 1999, M = 7.5, İzmit, Turkey Earthquake. Science 289:1519–1524CrossRefGoogle Scholar
  29. Şaroğlu F, Emre Ö, Boray A (1987) Seismicity and active faults of Turkey. General Directorate of Mineral Research and Exploration Report No. 8174 (in Turkish)Google Scholar
  30. Şaroğlu F, Emre Ö, Kuşçu İ (1992) Turkish active faults map. Directoriate of Mineral Research and Exploration, Ankara, TurkeyGoogle Scholar
  31. Taymaz T, Tan O (2001) Source parameters of June 6, 2000 Orta–Çankırı (Mw = 6.0) and December 15, 2000 Sultandav–Akşehir (Mw = 6.0) earthquakes obtained from inversion of teleseismic P- and SH-body-waveforms. Symposia on Seismotectonics of the North-western Anatolia–Aegean and recent Turkish earthquakes. May 8, 2001—Turkey, Atlas, 96–107Google Scholar
  32. Taymaz T, Tan O, Özalaybey S, Karabulut H (2002) Source characteristics of February 3, 2002 Çay–Sultandağı Earthquake (Mw = 6.5) Sequence in SW Turkey: a synthesis of seismological observations body-waveforms, strong motion, and aftershock seismicity survey data, 1st International Symposium of Istanbul Technical University the Faculty of Mines on Earth Sciences and Engineering, 16–18 May 2002, Istanbul, Turkey, Abstracts Book: SS-B-Oral, p. 60Google Scholar
  33. Ulusay R, Aydan Ö, Erken A, Kumsar H, Tuncay E, Kaya Z (2003) Characteristics of the Çay–Eber Earthquake and its evaluation in terms of local ground conditions. Fifth National Conference on Earthquake Engineering, 26–30 May 2003, İstanbul, TurkeyGoogle Scholar
  34. Utku M, Danışman MA, Akyol N, Akçığ Z (2003) The seismicity of Afyon and its surroundings: isoseist map of 03 February 2002 Çay Earthquake, and earthquake risk analysis. Geol Eng 27(2)Google Scholar
  35. Wessel P, Smith WHF (1995) New version of the generic mapping tools released, EOS. Trans Am Geophys Un 76:329CrossRefGoogle Scholar
  36. Wright TJ, Lu Z, Wicks C (2003) Source model for the Mw 6.7, 23 October 2002, Nenana Mountain Earthquake (Alaska) from InSAR. Geophys Res Lett 30(18):1974CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Bahadır Aktuğ
    • 1
  • Bülent Kaypak
    • 2
  • Rahmi Nurhan Çelik
    • 3
  1. 1.Geodesy DepartmentGeneral Command of MappingAnkaraTurkey
  2. 2.Department of Geophysical EngineeringAnkara UniversityAnkaraTurkey
  3. 3.Department of Geodesy and Photogrammetryİstanbul Technical UniversityİstanbulTurkey

Personalised recommendations