Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pepi...87..155a&link_type=abstract
Physics of the Earth and Planetary Interiors (ISSN 0031-9201), vol. 87, no. 1-2, p. 155-165
Physics
24
Earthquakes, Scattering Amplitude, Seismic Waves, Seismology, Turkey, Wave Attenuation, Wave Scattering, Mathematical Models, Mediterranean Sea, Spain, Structural Basins, Time Lag
Scientific paper
By analyzing the decay of coda wave amplitude, we have determined coda Q,Qc, in Western Anatolia (Turkey). Using the single isotropic scattering model, we analyzed 116 earthquakes which registered at the Gebze station by using five narrow frequency bands centered at 1.5, 3, 6, 8 and 10 Hz. Coda Q values were obtained using different lapse times, between 30 and 190 s, in steps of 10 s. Coda Qc for Western Anatolia depends on frequency and lapse time. For a lapse time of 30 s, the frequency dependence of Qc is Qc(f) = 50.7fexp 1.01 and for a lapse time of 190 s it is Qc(f) = 183.2fexp 0.76. In this region, the exponential value of the Qc frequency dependence is practically constant, between 0.7 and 1.0. The obtained coda Qc values were compared with those estimated in other regions. The coda Qc values for lapse times between 60 and 100 s for Western Anatolia and Southern Spain are practically the same, indicating similar coda wave attenuation patterns in both regions of the Mediterranean Basin.
Akinci Aybige
Ergintav Semih
Taktak A. G.
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