Estimation of the coda quality factor for the Romanian territory

Details Estimation of the coda quality factor for the Romanian territory Estimation of the coda quality factor for the Romanian territory

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pepi...67...87o&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 67, Issue 1-2, p. 87-94.

Physics

Scientific paper

The coda Q is estimated for crustal and intermediate-depth earthquakes that occurred in different seismic regions in Romania during 1981-1988. The `ƒ;p vs. t' method is used for the computation of the frequency-dependent quality factor. The data used are short-period S-13 and DD-1 recordings of local earthquakes, obtained at the seismic stations of the national network. A crustal coda Q map is presented and compared with the heat-flow distribution for Romania. For crustal events, Q ranges between 40 and 450 at 1 Hz, and shows two distinct types of power of frequency dependence: 0.1-0.2 and 0.7-0.9. For intermediate-depth earthquakes, Q = 700-800 at 1 Hz and the power of frequency dependence is 0.1-0.2.

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