Ufuk Aydın, Şakir Şahin, Ekrem Kalkan, Necmi Yarbaşı, Gökşin Aksoy

KEMALİYE CEVRESİNDE Pg, Sg SOĞURULMASI VE YENİ MAGNİTÜD FORMÜLÜ

The attenuation properties of seismic waves are one of the basic physical parameters used in seismological studies and earthquake engineering, which is closely, related the seismicity and regional tectonic activity of a particular area. In this study, we aimed to obtain attenuation coefficient of crust of Kemaliye city and its surrounding. In total 165 near-fields earthquake data recorded by the Kemaliye Station of Ataturk University Earthquake Research Center (AUERC) were used for the calculations. Maximum amplitudes of Pn and Sg waves were used in order to compute the earthquake magnitude. The attenuation has been determined by using the Chobra-Alexeev model based on the epicentre distance-amplitude relations. The linear equations systems obtained for the all events were solved using the least-squares method. Amplitude normalization process was performed for a reference value ML= 3,2, so as to correct effect of the magnitudes. The attenuation on calculation of attenuation coefficients (Pγ) 0.0207 1/km and (Sγ) 0,0358 1/km were obtained with the assistance of normalized amplitudes values for the region.

Anahtar Kelimeler:

Dalga soğurulması, lokal magnitüd, doğu Anadolu bölgesi.

ABSORPTION OF THE Pg, Sg WAVE IN AROUND KEMALİYE AND NEW MAGNİTÜDE FORMULA

Keywords:

Wave absorption, Eastern Anatolia region, local magnitude.,

PDF

___

Aki, K., 1969. Analysis of the seismic coda of local earthquakes as scattered waves. J Geophys Res 74:615-631.
Aki, K. and Richards, P.G., 1980.Quantitave Seismology, Theory and Methods. A series of boks in geology. W.H. Freeman and Company. San Francisco.pp198-169
Aki, K. And Richards.P.G., 1980. Quantitative Seismology: Theory and Methods, c. 98, 168-169.
Akıncı, A. 1994, Attenuative behaviors of Western anatolia and Southern Spain using single and Multiple scattering models, Ph.D.Thesis, Dokuz Eylül University, Grauate School of Natural and Applied Sciences, p. 37-39.
Akıncı, A. ve Eyidoğan, H. 1996. Frequency- dependent attenuation of S and koda waves in Erzincan region (Turkey), Phys. Earth Planet. Inter., 97, 109-119.
Allen, C.R. 1969, Active faulting in northern Turkey, California Inst.Technology, Geol. Sci., Contribution No.1577, 32p.
Alptekin, Ö. 1978, batı Anadolu depremlerinin odak mekanizmaları ve bunların aktif tektonik ile ilişkileri, 2. Odak mekanizmaları ve plaka tektoniği modeli, Jeofizik VII, 3, 30-56. [8] Ayanoğlu, A.
Güneydoğu Anadolu
bölgesinde Frekans bağımlı Soğurulma Çalışması.
Yüksek Lisans Tezi, Sakarya Üniversitesi, Fen
Bilimleri Enstitüsü, Sakarya.
Aydın, U. ve Kadirov, A. 2008. Erzincan ve Çevresinde P Dalgası Soğurulması. SAÜ. Fen Bilimleri Dergisi, 12. Cilt, 1. Sayı,n S 1-8.
Aydın, U., Kadirov, A. ve Acar, A. 2009. Mus Genis-bant Deprem istasyonu Verilerine Göre Dogu Anadolu’da Sismik Dalga Sogurulması Süleyman Demirel Üniversitesi, Fen Bilimleri Enstitüsü Dergisi, 13-2 (2009),178-185.
Aydın, U., Sahin, Ş. (2011). Comparison of the attenuation properties for two different areas in eastern Anatolia, Turkey, Soil Dynamics and Earthquake Engineering, 31, 1192–1195. [12] Barka, .A.A. and Gülen, L. 1987, Complexevolution of the Erzincan basin (eastern Turkey), Jour. Structural Geol. 11, 275-283.
Barka, A.A. and Kadinsky-Cade, K. 1988, Strike- slip fault geometry in Turkey and itsinfluence on Earthquake activity, Tectonics 7, 663-684.
Bozkurt, E. 2001, Neotectonics of Turkey– asynthesis, Geodynamic Act 14 (2001) 3-30.
Chobra, S. and Alexeev V. 2004. A new approach to enhancement of frequency bandwidth of surface seismic data.Technical Article, First Break, August v.22 p.30-42.
Gök, R. and Türkelli N, Sandov E., Seber D., Barazangi M., 2000, Regional wave propagation in Turkey and surround.ing regions, Geoph. Res. Let. Vol. 27(3), 429-432.
Horasan, G., and A. Boztepe –Güney (2004). S- wave attenuation in the Sea of Marmara, Turkey, Physics of Earth and planetary Interrior. 142, 215- 224.
Jackson, J. And McKenzie, D.P. 1984, Active tectonics betweenwestern Turkey and Pakistan, Geophys. Jour. Roy. Astr. Soc. 77, 185-265. Belt
Jackson, J. 1992, Partitioning of strike-slip and convergent motion between Eurasia and Arabia in eastern Turkey and the Caucasus, J. Geophys.Res. 97, 12, 471-12,479.
Johston, D.H., and Toksöz, M.N., 1981. Definition and terminology:Seismicwaveattenuation. S.E.G. Geophys.Rep.Series.Vol.2,pp.1-5.691-711.
Ketin, İ. 1969, Kuzey Anadolu Fayı hakkında, M.T.A. Enstitüsü Dergisi 72, 1-27.
McClusky et al. (2000).GPS Constrains on Africa (Nubia) and Arabia Plate Motions. Journal of Geophysical Res. Lett. 105 (B3), 5697-5719.
McKenzie, D.P. 1972, Active tectonics of the Mediterranean region, Geophys. J.R. Astr. Soc. 30, 109-185.
Püskülcü, S. 1996, attenuation of Lg phase ın Eastern Turkey, M.Sc. Thesis, in Geophy. Eng. Bogaziçi University.
Sertçelik, F. ve Kenar, Ö., Doğu Anadolu’ da soğurma, Jeofizik 15, 1s: 63-75.
Toksöz, M.N., Shakal, A.F. and Michael, A.J. 1979, Space-time migration of earthquakes along the North Anatolia Fault Zone and seismic gaps, Padeoph.vol. 117, 1258-1269, BirkhauserVerlag, Basel.
Toksöz, M.N. and Johnston, D.H. 1981, Seismic wave Attenuation, Geophysics Reprint Series No.2,339-351.