Buradasınız

Anasayfa » Content

PRENS ADALARI FAYINDAKİ DEPREMLERİN KAYNAK PARAMETRELERİNİN EŞZAMANLI VE TEKİL TERS ÇÖZÜM TEKNİKLERİ İLE BELİRLENMESİ

DETERMINATION OF EARTHQUAKE SOURCE PARAMETERS OF PRINCE ISLANDS FAULT USING SIMULTANEOUS AND INDIVIDUAL INVERSION TECHNIQUES

Journal Name:

  • İstanbul Yerbilimleri Dergisi

Publication Year:

  • 2010

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study we analyzed the aftershocks of the 1999 Izmit earthquake that took place along the 40-km-long Prince’s island segment of the North Anatolian Fault which is the nearest trace of the fault to the city of Istanbul. The seismic moment magnitudes of these events range between 3.1 ≤ Mw ≤ 5.2 and the focal mechanism solutions are available. We compiled the waveforms of the broadband stations running in the region, rotated them to obtain the radial and transversal components, and corrected for the radiation pattern and geometrical spreading effects. We estimated the source parameters (seismic moment, Mo; corner frequency, fc) using the simultaneous inversion technique (NetMoment) developed by Hutchings (2004) that use the S-phases of the events recorded by local seismic networks. This method can also be used to derive the source parameters of earthquakes recorded at single station. The resulting parameters are estimated from the best fitting theoretical spectrum which is obtained through non-linear least square fitting of the observed S-wave displacement spectrum to the Brune omega squared (w2) source displacement spectrum (Brune, 1970).
Bookmark/Search this post with
Abstract (Original Language): 
Bu çalışmada, 1999 depremlerinin ardından Prens Adaları fayı olarak bilinen Kuzey Anadolu Fay Zonunun İstanbul’a en yakın olarak geçtiği yaklaşık 40 km uzunluğundaki fay segmenti üzerinde meydana gelmiş, sismik moment büyüklüğü (3.1 ≤ M ≤ 5.2) arasında değişen artçı depremlerden fay düzlemi çözümleri mevcut olanların, geniş bant istasyon kayıtları derlenmiş ve radial ile transversal bileşenlerine ayrılarak geometrik saçılma ve yayınım yolu (radiation pattern) etkileri giderilmiştir. Hutchings (2004) tarafından geliştirilen, yerel ağlarla kaydedilmiş depremlerin S fazlarını kullanan eş zamanlı (simulatane) ters çözüm yöntemi (NetMoment, Hutchings, 2004) ile depremlerin kaynak parametreleri (Moment, Mo, Kesme Frekansı, fc) belirlenmiştir. Bu yöntem aynı zamanda tek bir istasyonda kaydedilmiş depremlerin kaynak parametrelerinin hesaplanmasına olanak sağlamaktadır. Bu amaçla kaydedilmiş depremlerin düzeltilmiş S dalgası yerdeğiştirme spektrumu, Brune omega kare (w2) kaynak yer değiştirme spektrumuna (Brune, 1970) doğrusal olmayan en küçük kareler yöntemi kullanılarak eşleştirilmiş ve en iyi uyumu veren teorik spektrum belirlenerek çözüm parametreleri elde edilmiştir.
FULL TEXT (PDF): 
PDF icon arastirmax-prens-adalari-fayindaki-depremlerin-kaynak-parametrelerinin-eszamanli-tekil-ters-cozum-teknikleri-ile-belirlenmesi.pdf
  • 1
53-63
  • Turkish

REFERENCES

References: 

DEĞİNİLEN BELGELER
Abercrombie, R.E., 1995, Earthquake source scaling
relationships from -1 to 5 ML using seismograms
recorded at 2.5-km depth, J. Geophys. Res., 100,
24015-24036.
Aki, K. and P. G. Richards, 1980, Quantitative
seismology,Theory and Methods, VolumesI and II,
W. H. Freeman and Company, San Francisco, CA.
Akinci A., Malagnini l., Herrmann, R. B., Gok R,
and Sørensen M. B., 2006, Ground motion scaling
in the Marmara region, Turkey. Geophys. J. Int.,
166, 635-651.
Anderson, J.G., and Hough, S, 1984, A model for the
shape of the Fourier amplitude spectra of
accelerograms at high frequencies, Bull. Seismol.
Soc. Am. 74, 1969-1994.
Bonilla, L. F., Steidl J. H., Lindley, G. T., Tumarkin,
A, G., Archuleta, R. J., 1997, Site amplification in
the San Fernando Valley, CA: Variability of the site
effect estimation using the S-wave coda, and H/V
methods, Bull. Seism. Soc. Am., 87, 710-730.
Brune, J.N., 1970, Tectonic stress and the spectra of
seismic shear waves from earthquakes, J. Geophys.
Res.,75, 4997-5010, (Correction, J. Geophys. Res.
76 (20), 5002, 1971).
Caceci, M.S., Cacheris, W.P., 1998, Numerical
Recipes, (Chapter 10.4).
Caceci, M.S., Cacheris, W.P., 1984, Fitting curves to
data, Byte Magazine, May, 340–360.
Franceschina, G., Kravanja, S., Bressan G., 2006,
Source parameters and scaling relationships in the
Fruli-Venezia Giulia (Northeastern Italy) region,
Physics of the Earth and Planetary Interiors., 154,
148-167.
Gok R, Hutchings L., Mayeda K., and Kalafat D.,
2009, Source Parameters for 1999 North Anatolian
Fault Zone Aftershocks. Pure appl. geophys., DOI
10.1007/s00024-009-0461-x.
Hanks, T.C., 1982, Fmax, Bull. Seismol. Soc. Am., 72,
1867-1879.
Hutchings, L., Wu, F 1990, Emprical Green functions
from small earthquakes. A waveform study of
locally recorded afterschoks of the San Fernando
earthquake, J. Geophys. Res., 95, 1187-1214.
Hutchings, L., 2004, Program NetMoment, a
Simultaneous Inversion for Moment, Source Corner
Frequency, and Site Specific t*, Lawrence
Livermore National Laboratory, Livermore, CA,
UCRL-ID 135693.
İmren C., Le Pichon, X., Rangin C., Demirbağ E.,
Ecevitoğlu B., Görür N., 2001, The Anatolian fault
within the Sea of Marmara: A new interpretation
based on Multi channel seismic and multibeam
bathymetry data, Earth Planet Sci Letter, 186, 143-
158.
Jarpe, S.J., Kasameyer, P.K., 1996, Validation of a
methodology for predicting broadband strong
motion time histories using kinematic rupture
models and empirical Green’s functions, Bull.
Seismol. Soc. Am., 86, 1116-1129.
Karabulut H., Özalaybey S., Taymaz T., Aktar M.,
selvi O., Kocaoğlu A., 2003, A Tomographic image
of the shallow crustal structure in The Eastern
Marmara, Geophys. Res. Lett., 30 (24, 2777).
Nakamura, Y (1989). A Method for Dynamic
Characteristics Estimation of Subsurface using
Microtremor on the Ground Surface, Quarterly
Report of RTRI, Vol.30, No. 1, pp. 25-33.
Nelder, J.A., Mead, R., 1965, A simplex method for
function minimization, Computer J., 7, 308.
Parsons, T., S. Toda, R. S. Stein, A. Barka, and J. H.
Dieterich 2000, Heightened odds of large
earthquakes near Istanbul: An interaction-based
probability calculation, Science., 288, 661-665.
Pinar, A., Kuge, K., Honkuro, Y., 2003, Moment
tensor inversion of recent small to moderate sized
earthquakes: implications for seismic hazard and
active tectonics beneath the Sea of Marmara.
Geophys. J. Int., 153, 133-145.
S. Parolai, D. Bindi, E. Durukal, H. Grosser, and C.
Milkereit., 2007, Source Parameters and Seismic
Moment-Magnitude Scaling for Northwestern
Turkey. BSSA., Vol. 97, No. 2, pp. 655

Thank you for copying data from http://www.arastirmax.com