Estimation of frequency dependent coda wave attenuation structure at the vicinity of Cairo Metropolitan Area

• Autorzy: El-Haidy S. , Adel M. , Adel M. , Adel M. , Abu-El-Ata A. , Sayed M.
• Języki publikacji: EN

Abstrakty

EN

Estimation of seismic wave attenuation in the shallow crust in terms of coda wave Q structure previously investigated in the vicinity of Cairo Metropolitan Area was improved using seismograms of local earthquakes recorded by the Egyptian National Seismic Network. The seismic wave attenuation was measured from the time decay of coda wave amplitudes on narrow bandpass filtered seismograms based on the single scattering theory. The frequency bands of interest are from 1.5 to 18 Hz. In general, the values obtained for various events recorded at El-Fayoum and Wadi Hagul stations are very similar for all frequency bands. A regional attenuation law Qc = 85.66 f 0.79 was obtained.

Słowa kluczowe

EN

coda wave frequency dependent attenuation; Cairo; seismic wave

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2006
• Tom: Vol. 54, no. 2
• Strony: 177--186

Twórcy

autor

El-Haidy S.

autor

Adel M.

autor

Adel M.

autor

Adel M.

autor

Abu-El-Ata A.

autor

Sayed M.

• The National Research Institute of Astronomy and Geophysics (NRIAG), Cairo, Egypt,

Bibliografia

• Aki, K., 1969, Analysis of seismic coda of local earthquakes as scattered waves, J. Geophys. Res. 74, 615-631.
• Aki, K., 1980, Attenuation of shear-waves in the lithosphere for frequencies from 0.05 to 25 Hz, Phys. Earth Planet. Inter. 21, 50-60.
• Aki, K., and B. Chouet, 1975, Origin of coda waves: source attenuation and effects, J. Geophys. Res. 80, 3322-3342.
• Boatwright, J., 1978, Detailed spectral analysis of two small New York state earthquakes, Bull. Seism. Soc. Am. 68, 1117-1131.
• Castro, R.R., J.G. Anderson and S.K. Singh, 1990, Site response, attenuation and source spectra of S waves along the Guerrero, Mexico, subduction zone, Bull. Seism. Soc. Am. 80, 1481-1503.
• Frankel, A., A. McGarr, J. Bicknell, J. Mori, L. Seeber and E. Cranswick, 1990, Attenuation of high-frequency shear waves in the crust: measurements from New York state, South Africa, and Southern California, J. Geophys. Res. 95, 17441-17457.
• Herraiz, M., and A.F. Espinosa, 1987, Coda waves: a review, Pure Appl. Geophys. 125, 499-577.
• Herrmann, R., 1980, Q estimates using the coda of local earthquakes, Bull. Seism. Soc. Am.70, 447-468.
• Hough, S.E., 1997, Empirical Green's function analysis: taking the next step, J. Geophys. Res. 102, 5369-5384.
• Hough, S., J.G. Anderson, J. Brune, F. Vernon, J. Berger, J. Fletcher, L. Haar, T. Hanks and L. Baker, 1988, Attenuation near Anza, California, Bull. Seism. Soc. Am. 78, 672-691.
• Kinoshita, S., 1994, Frequency-dependent attenuation of shear waves in the crust of the southern Kanto area, Japan, Bull. Seism. Soc. Am. 84, 1387-1396.
• Li Song-lin, Fan Ji-chang, Hui Nai-ling et al., 1991, A study on coda Q-value and its relationship with frequency of the Luanxian region, China, Acta Seism. Sinica 4, 4, 509-520.
• Mitchell, B., 1995, An elastic structure and evolution of the continental crust and upper mantle from seismic surface wave attenuation, Rev. Geophys. 33, 441-462.
• Rautian, T.G., and V.I. Khalturin, 1978, The use of the coda for determination of the earthquake source spectrum, Bull. Seism. Soc. Am. 68, 923-948.
• Sato, H., 1977, Energy propagation including scattering effects, single isotropic scattering approximation, J. Phys. Earth 25, 27-41.
• Zhang Tian-zhong, Gao Long-sheng, Zhang Wei-ping, 1991, The Q-factor and its time window dependence in the area of Western-Yunnan seismological experiment site, Acta Seism. Sinica 4, 1, 15-28.