Coda-wave attenuation in the Baikal rift system lithosphere

Details Coda-wave attenuation in the Baikal rift system lithosphere Coda-wave attenuation in the Baikal rift system lithosphere

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011pepi..188..121d&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 188, Issue 1, p. 121-126.

Physics

Scientific paper

Using the single backscattering model a seismic quality factor (QC), a frequency parameter (n) and an attenuation coefficient (δ) have been studied by analyzing the coda waves of local earthquakes of Baikal rift system. The QC values were estimated at 6 central frequencies and for 8 lapse time windows W from 20 to 90 s. The average QC varies with frequency from 46 ± 45 (at 0.3 Hz) to 1025 ± 221 (at 12 Hz). The δ values show significant variations from 0.009 km-1 (for W = 20 s) to 0.003 km-1 (for W = 90 s). Increasing of Q and decreasing of n values with lapse time windows show that the lithosphere upper part is more heterogeneous as against its lower layers.

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