Comparison of seven methods for the computation of Q

Details Comparison of seven methods for the computation of Q Comparison of seven methods for the computation of Q

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pepi...55..259t&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 55, Issue 3-4, p. 259-268.

Physics

23

Scientific paper

Seven methods for the evaluation of the seismic quality factor Q have been investigated: (1) wavelet modelling, (2) spectral modelling, (3) spectral ratio method, (4) matching technique, (5) amplitude decay method, (6) risetime method, and (7) the determination of Q using the analytical signal. These methods were tested using three theoretical VSP seismograms which are based on the same velocity and Q depth model. Whereas in the noise-free case the method of the analytical signal (7) proved to be superior to all other methods, the modelling techniques (1) and (2) seem to have advantages when minor noise is present. In the case of intensive noise it is hard to obtain any reliable estimate of attenuation.

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