Problems of Engineering Seismology: article

Algorithm of microseism processing by H/V method to estimate parameters of two-layer velocity model based on ellipticity of surface Rayleigh wave
A.V. Yablokov 1,2,3 P.A. Dergach 1,2 A.V. Liseikin 4 A.S. Serdyukov 1,2,3
1 Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences 2 Novosibirsk State University 3 Chinakal Institute of Mining of the Siberian Branch of the Russian Academy of Sciences 4 Seismological Branch of the Federal Research Center “Geophysical Survey of Russian Academy of Sciences”
Journal: Problems of Engineering Seismology
Tome: 51
Number: 1
Year: 2024
Pages: 95-108
UDK: 550.834
DOI: 10.21455/VIS2024.1-7
Keywords: microseisms, H/V method, Nakamura method, refracted wave method, multi-channel surface wave analysis method, seismic microzonation
Аnnotation: The research develops of the H/V method by design a workflow of the microseismic data processing, which includes preliminary filtering, summation of amplitude spectra, the component spectrum ratio calculation (H/V-curve) and its inversion based on ellipticity curves of the surface Rayleigh wave. As a result of the algorithm the resonance frequencies values, depth of top of the bedrock, S-wave velocity in the soil and bedrock are determined tolerant to noise at the point of measurement. The search ranges of the inverse problem solution are evaluated using the results of processing the active seismic data by refracted and surface waves. As a result of H/V-curves processing, the maps of restored parameters distribution for the whole area of the vibroseismic polygon near the settlement of Bystrovka, Novosibirsk region, are constructed. The depth of top of the bedrock calculated by different seismic methods are highly correlated with each other. The maps of restored parameter distribution may apply for the near-surface section studying, the depth of top of the bedrock estimating, and the incremental seismic intensity determining by seismic impedance method or calculating synthetic earthquake accelerograms.