Characteristics of seismic activity in the Western, Central and Eastern parts of the North Anatolian Fault Zone, Turkey: Temporal and spatial analysis
Characteristics of seismic activity along the North Anatolian Fault Zone are analyzed between 1970 and 2010. Magnitude completeness changes between 2.7 and 2.9 in the North Anatolian Fault Zone. The frequency-magnitude distribution of earthquakes is well represented with a b-value typically close to 1. A clear decrease in temporal distribution of b-value is observed before the strong main shocks. Correlation dimension values are relatively large and the seismic activity is more clustered at larger scales in the North Anatolian Fault Zone.
A statistical assessment is made in order to detect the current seismic quiescence anomalies in the beginning of 2010. Eight significant anomalous zones throughout the North Anatolian Fault Zone are detected. These are centered at: (1) 41.08°N–28.58°E (around Silivri), (2) 41.47°N–29.51°E (in the Black Sea), (3) 40.69°N–29.78°E (including Izmit), (4) 40.26°N–26.46°E (around Gelibolu, Canakkale), (5) 40.59°N–31.03°E (including Duzce fault), (6) 40.86°N–35.30°E (around Amasya), (7) 39.48°N–39.74°E (around Erzincan), and (8) 39.06°N–40.50°E (around Bingol).
Key wordsNorth Anatolian Fault Zone seismic activity fractal analysis decluster seismic quiescence
Unable to display preview. Download preview PDF.
- Aki, K. (1965), Maximum likelihood estimate of b in the formula log N = a − bM and its confidence limits, Bull. Earthq. Res. Inst. Tokyo Univ. 43, 237–239.Google Scholar
- Ambraseys, N.N., and A. Zátopek (1968), The Varto Üstükran (Anatolia) earthquake of 19 August 1966 summary of a field report, Bull. Seism. Soc. Am. 58,1, 47–102.Google Scholar
- Awad, H., M. Mekkawi, G. Hassib, and M. Elbohoty (2005), Temporal and three dimensional spatial analysis of seismicity in the Lake Aswan area, Egypt, Acta Geophys. Pol. 53,2, 153–166.Google Scholar
- Barka, A. (1996), Slip distribution along the North Anatolian fault associated with the large earthquakes of the period 1939 to 1967, Bull. Seism. Soc. Am. 86,5, 1238–1254.Google Scholar
- Barka, A., H.S. Akyüz, E. Altunel, G. Sunal, Z. Çakır, A. Dikbaş, B. Yerli, R. Armijo, B. Meyer, J.B. de Chabalier, T. Rockwell, J.R. Dolan, R. Hartleb, T. Dawson, S. Christofferson, A. Tucker, T. Fumal, R. Langridge, H. Stenner, W. Lettis, J. Bachhuber, and W. Page (2002), The surface rupture and slip distribution of the 17 August 1999 İzmit earthquake (M 7.4), North Anatolian fault, Bull. Seism. Soc. Am. 92,1, 43–60, DOI: 10.1785/0120000841.CrossRefGoogle Scholar
- Grassberger, P., and I. Procaccia (1983), Measuring the strangeness of strange attractors, Physica 9,D, 189–208.Google Scholar
- Gutenberg, R., and C.F. Richter (1944), Frequency of earthquakes in California, Bull. Seism. Soc. Am. 34, 185–188.Google Scholar
- Kutoglu, H.S., and H. Akcin (2006), Determination of the 30-year creep trend on the Ismetpaşa segment of the North Anatolian Fault using an old geodetic network, Earth Planets Space 58, 937–942.Google Scholar
- Özacar, A.A., C.B. Biryol, H. Tok, C.R. Gans, G. Zandt, S.L. Beck, L.M. Warren, and T. Taymaz (2009), Passive Seismic Experiment for the North Anatolian Fault: Preliminary Reports, 62nd Geological Kurultai of Turkey, 13–17 April 2009, MTA-Ankara, Turkey, p. 828.Google Scholar
- Öztürk, S. (2009), Deprem Tehlikesi ve Artçı Şok Olasılığı Değerlendirme Yöntemlerinin Türkiye”deki Depremlere Bir Uygulaması (An Application of the Earthquake Hazard and Aftershock Probability Evaluation Methods to Turkey Earthquakes), Ph.D. Thesis, Karadeniz Technical University, Trabzon, Turkey (in Turkish with English abstract), http://tez2.yok.gov.tr.Google Scholar
- Polat, O., E. Gök, and D. Yılmaz (2008), Earthquake hazard of the Aegean extension region (West Turkey), Turk. J. Earth Sci. 17,3, 593–614.Google Scholar
- Reilinger, R.E., S.C. McClusky, M.B. Oral, R.W. King, M.N. Toksöz, A.A. Barka, I. Kinik, O. Lenk, and I. Sanli (1997), Global Positioning System measurements of present-day crustal movements in the Arabia-Africa-Eurasia plate collision zone, J. Geophys. Res. 102,B5, 9983–9999, DOI: 10.1029/96JB03736.CrossRefGoogle Scholar
- Şaroğlu, F., Ö. Emre, and I. Kuşcu (1992), Active Fault Map of Turkey, General Directorate of Mineral Research and Exploration, Ankara, Turkey.Google Scholar
- Şengör, A.M.C., O. Tüysüz, C. İmren, M. Sakınç, H. Eyidoğan, N. Görür, X.L. Pichon, and C. Rangin (2004), The North Anatolian Fault: A New Look, Annu. Rev. Earth Planet. Sci. 33, 37–112.Google Scholar
- Turcotte, D.L. (1990), Fractals and Chaos in Gelogy and Geophysics, Cambridge University Press, Cambridge.Google Scholar
- Utsu, T. (1971), Aftershocks and earthquake statistics (III): Analyses of the distribution of earthquakes in magnitude, time and space with special consideration to clustering characteristics of earthquake occurrence (1), J. Faculty Sci., Hokkaido University, Ser. VII (Geophys.) 3, 379–441.Google Scholar
- Wiemer, S. (2001), A software package to analyze seismicity: ZMAP, Seismol. Res. Lett. 72,2, 373–382.Google Scholar
- Wiemer, S., and M. Wyss (1994), Seismic quiescence before the Landers (M = 7.5) and Big Bear (M = 6.5) 1992 earthquakes, Bull. Seism. Soc. Am. 84,3, 900–916.Google Scholar
- Yılmaz, V., M. Erişoğlu, and H.E. Çelik (2004), Probabilistic prediction of the next earthquake in the NAFZ (North Anatolian Fault Zone), Turkey, Doğuş Üniversitesi Dergisi 5,2, 243–250 (in English with Turkish abstract).Google Scholar