Influence of the upper section on the amplitude-frequency content of a seismic signal by the example of seismic stations in the Baikal and the Transbaikal region

Abstract

The amplitude-frequency characteristics of the upper section of all permanent seismic stations in the Baikal and the Transbaikal region were studied. These data were required to solve certain inverse seismological problems and in connection with the fact that the accelerograms recorded at these stations are used for zoning of sections of the Baikal and the Transbaikal region. Frequency characteristics were obtained using computational and experimental methods. Seismic and geoelectric surveys were carried out; the data were used to obtain geophysical profiles of the upper part of the sedimentary column for most of the seismic stations. These profiles allowed estimating the amplitude-frequency characteristics. The H/V spectral ratios were treated as an experimental way to obtain the frequency characteristics. The frequency characteristics of the upper part of the section underneath seismic stations in the Baikal region were found for the first time.