Abstract
The aim of this study was to investigate the earthquake hazard of the East Anatolian Fault Zone by determining the a and b parameters in a Gutenberg–Richter magnitude–frequency relationship. For this purpose, the East Anatolian Fault Zone is divided into five different source zones based on their tectonic and seismotectonic regimes. We calculated the b value, which is the slope of the frequency–magnitude Gutenberg–Richter relationship, from the maximum likelihood method (ML). Also, we estimated the mean return periods, the most probable maximum magnitude in the time period of t years and the probability for an earthquake occurrence for an earthquake magnitude ≥M during a time span of t years. We then produced a and b value maps using the ML. We obtained the lowest b value in Region 1 covered Karlıova triple junction. This conclusion is strongly supported from the probability value, which shows the largest value (90 %) for an earthquake with magnitude greater than or equal to 6.0. The mean return period for such a magnitude is the lowest in this region (43 years). The most probable magnitude in the next 100 years was calculated, and we determined the highest value around Karlıova triple junction. According to these parameters, Region 1 covered the Karlıova triple junction and is the most dangerous area around the East Anatolian Fault Zone.
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References
Aki K (1965) Maximum likelihood estimate of b in the formula log N = a − bM and its confidence limits. Tokyo Univ. Bull. Earthq. Res. Inst 43:237–239
Aktuğ B, Dikmen U, Dogru A, Ozener H (2013) Seismicity and strain accumulation around Karliova triple junction (Turkey). J Geodyn 67:21–29
Allen CR (1969) Active faulting in northern Turkey. California Institute of Technology, Division of Geological Sciences, Contribution No. 1577. 32
Alptekin Ö (1978) Magnitude–frequency relationships and deformation release for the earthqukes in and around Turkey. Thesis for Promoting to Associate Professor Level, Karadeniz Technical University, 107
Arpat E, Şaroğlu F (1972) Doğu Anadolu fayı ile ilgili bazı gözlem ve düşünceler (Some observations and thoughts on the East Anatolian fault). Bull Miner Res Explor Inst Turk 73:44–50
Arpat E, Şaroğlu F (1975) Turkiye’deki bazı önemli genç tektonik olaylar (On some important young tectonic events in Turkey). Bull Geol Soc Turk 18:29–41
Aslan E (1972) Magnitude and time distributions of earthquakes in Turkey. Bull Int Inst Seismol Earthq Eng 7:1–10
Barka AA, Kadinsky-Cade K (1988) Strike-slip fault geometry in Turkey and its influence on earthquake activity. Tectonics 7(3):663–684
Bath M (1979) Seismic risk in Turkey—a preliminary approach. Tectonophysics 54:T9–T16
Bayrak Y, Öztürk S, Erduran A, (2002) The relationships between maximum magnitudes and modal values for different regions of Turkey. 3rd balkan geophysical congress and exibition 8–4, 24–28 June, Sofia, Bulgaria
Bayrak Y, Yılmaztürk A, Öztürk S (2005) Relationships between fundamental seismic hazard parameters for the different source regions in Turkey. Nat Hazards 36:445–462
Bayrak Y, Öztürk S, Çınar H, Kalafat D, Tsapanos TM, Ch Koravos G, Leventakis GA (2009) Estimating earthquake hazard parameters from instrumental data for different regions in and around Turkey. Eng Geol 105:200–210
Chorowicz J, Luxey P, Lyberis N, Carvalho J, Parrot JF, Yurur T, Gundogdu N (1994) The Maras triple junction (southern Turkey) based on digital elevation model and satellite imagery interpretation. J Geophys Res 99(B10):20225–20242
Crowell JC (1974) Origin of late cenozoic basins in southern California. Soc Econ Paleontol Miner Spec Publ 22:190–204
Dewey JF, Şengör AMC (1979) Aegean and surrounding regions: complex multi-plate and continuum tectonics in a convergent zone. Geol Soc Am Bull 90:84–92
Dewey JF, Pitman WC, Ryan WBF, Bonnin J (1973) Plate tectonics and the evolution of the Alpine system. Geol Soc Am Bull 84:3137–3180
Erdik M, Alpay BY, Onur T, Sesetyan K, Birgoren G (1999) Assesment of earthquake hazard in Turkey and neighboring regions. Ann Geophys 42:1125–1138
Felzer K (2006) Calculating the Gutenberg–Richter b-value. AGU talk, USGS
Frohlich C, Davis SC (1993) Teleseismic b values; or, much ado about 1.0. J Geophys Res 98:631–644
Gutenberg R, Richter CF (1944) Earthquake magnitude, intensity, energy and acceleration. Bull Seismol Soc Am 32:163–191
Hempton MR, Dewey JF (1981) Structure and tectonics of the lake Hazar pull-apart basin, SE Turkey. Trans Am Geophys Union EOS 62:1033
Hempton MR, Dewey JF, Şaroğlu F (1981) The East Anatolian transform fault: along strike variations in geometry and behavior. Trans Am Geophys Union EOS 62:393
Kayabali K (2002) Modeling of seismic hazard for Turkey using the recent neotectonic data. Eng Geol 63:221–232
Kayabalı K, Akın M (2003) Seismic hazard map of Turkey using the deterministic approach. Eng Geol 69:127–137
Ketin I (1948) Ü ber die tektonisch-mechanischen Folgerungen aus den grossen anatolischen Erdbeben des letzten Dezenniums. Geol Rundsch 36:77–83
Lopez Casado C, Sanz de Galdano C, Delgado J, Peinado MA (1995) The b parameter in the Betic Cordillera, Rif and nearby sectors. Relations with the Tectonics of the region. Tectonophysics 248:277–292
Lovelock PER (1984) A review of the tectonics of the northern middle east region. Geol Mag 121:577–587
Manakou MV, Tsapanos TM (2000) Seismicity and seismic hazard parameters evaluation in the island of Crete and the surrounding area inferred from mixed files. Tectonophysics 321:157–178
McKenzie DP (1970) Plate tectonics of the mediterranean region. Nature 226:239–243
McKenzie DP (1972) Active tectonics of the mediterranean region. Geophys J R Astron Soc 30:109–185
McKenzie DP (1976) The East Anatolian fault: a major structure in eastern Turkey. Earth Planet Sci Lett 29:189–193
McNally KC (1989) Earthquakes and seismicity. In: James DE (ed) The encyclopedia of solid earth geophysics. Springer, pp 308–315
Miyamura S (1962) Magnitude–frequency relations and its bearing on geotectonics. Proc Jpn Acad 38:27–30
Mogi K (1962) Magnitude–frequency relationship for elastic shocks accompanying fractures of various materials and some related problems in earthquakes. Bull Earthq Res Inst Univ Tokyo 40:831–883
Mogi K (1967) Earthquakes and fractures. Tectonophysics 5:35–55
Muehlberger WB, Gordon MB (1987) Observations on the complexity of the East Anatolian fault, Turkey. J Struct Geol 9(7):899–903
Nalbant SS, McCloskey J, Steacy S, Barka A (2002) Stress accumulation and increased seismic risk in Eastern Turkey. Earth Planet Sci Lett 195:291–298
Oral MB, Reilinger R, Toksoz R (1992) Deformation of the Anatolian block as deduced from GPS measurements. Trans Am Geophys Union EOS 73:120
Pacheco JF, Scholz C, Sykes L (1992) Changes in frequency–size relationship from small to large earthquakes. Nature 355:71–73
Perinçek D, Çemen I (1990) The structural relationship between the East Anatolian and Dead Sea fault zones in southeastern Turkey. Tectonophysics 172:331–340
Reasenberg P (1985) Second-order moment of central California seismicity, 1969–82. J Geophys Res 90:5479–5495
Reilinger RE, McClusky SC, Oral MB, King RW, Toksoz MN (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
Şaroğlu F, Emre Ö, Kuşçu I (1992) The East Anatolian Fault Zone of Turkey. Annales Tectonicae, 99–125 (Special Issue-Supplement to Volume VI)
Scholz CH (1968) The Frequency–magnitude relation of microfracturing in rock and its relation to earthquakes. Bull Seismol Soc Am 58:399–415
Udias A, Mezcua J (1997) Fundamentos de Geofisica, QE 501. Alianza Editorial, Madrid
Wiemer S (2001) A software package to analyze seismicity: ZMAP. Seismol Res Lett 72:373–382
Wiemer S, Wyss M (1997) Mapping the frequency–magnitude distribution in asperities: an improved technique to calculate recurrence times. J Geophys Res 102:15115–15128
Wiemer S, Wyss M (2000) Minimum magnitude of complete reporting in earthquake catalogs: examples from Alaska, the Western United States, and Japan. Bull Seismol Soc Am 90:859–869
Yalçin H (2012) Türkiye Ve Kafkaslarin Depremselliği Deprem Tehlikesinin İncelenmesi. MSc thesis, Sakarya University
Yarar R, Ergünay O, Erdik M, Gülkan P (1980) A preliminary probabilistic assessment of the seismic hazard in Turkey. In: Proceedings of the 7th World conference on earthquake Engineering, Istanbul, pp 309–316
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Bayrak, E., Yılmaz, Ş., Softa, M. et al. Earthquake hazard analysis for East Anatolian Fault Zone, Turkey. Nat Hazards 76, 1063–1077 (2015). https://doi.org/10.1007/s11069-014-1541-5
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DOI: https://doi.org/10.1007/s11069-014-1541-5