ESTIMATION OF INTERNAL ABSORPTION AND SCATTERING OF ELASTIC WAVES, THEIR CONTRIBUTION TO THE TOTAL ATTENUATION FOR THE TERRITORY OF THE CHUI-KURAI ZONE

The seismic wave attenuation and its components in the Earth’s crust of the Gorny Altai’s Chuya-Kurai zone was studied using code envelope inversion method. The analysis used waveforms of earthquakes with a magnitude ML > 2.5, recorded by a network of stationary and temporary stations of the Altai-Sayan Branch of Geophysical Survey, Siberian Branch of the Russian Academy of Sciences within the studied region. As a result, the contribution of Qi−1 absorption and Qsc−1 scattering attenuation to the overall Qi−1 attenuation of the main structures of the region was determined, and the spatial distribution of the Qt parameter, as well as the seismic albedo B0, was estimated. The dominance of the absorption contribution over scattering in the overall attenuation of seismic waves is shown. The obtained values of the seismic Q-factor parameter make it possible to carry out an accurate calculation of the moments of magnitudes and an assessment of the earthquake focal parameters, as well as more accurately calculate artificial accelerograms, etc.