The Seismic Quality Factor of the Lithosphere and Seismicity in the Area of the HPP Cascade of the Upper and Middle Reaches of the Vakhsh River

The seismic coda wave attenuation characteristic in the area of the HPP cascade in the upper and middle reaches of the Vakhsh River was studied. The short-period coda waves of the local earthquakes, as recorded by frequency-selective seismic stations in 1958–1989, and digital seismogram data earthquakes that occurred in region since 1989 until 2021 were analyzed. A comparative analysis of seismological data obtained by analog and digital seismic stations has been carried out. The correlation of spatial inhomogeneities of the S-wave attenuation field with tectonics and seismicity in the area of the HPP cascade and in nearby territories is considered.