Author:
Du Qingling,Pan Yanhui,Xin Youyang
Abstract
This study investigates the method and application of single-channel, three-component microtremor signal co-directional Rayleigh surface-wave extraction. The research focuses on filtering linear polarization waves using polarizability wave and phase-difference filtering, which were analyzed based on both simulated data and real microtremor signals. Additionally, the study examines the use of time-frequency analysis to analyze microtremor signals and identify Rayleigh wave propagation direction. The combination of these methods leads to a set of procedures for extracting high-SNR co-directional Rayleigh surface waves from microtremor signals, which was applied to the elliptical polarizability imaging method. Results indicate that the proposed data processing process effectively filters linear polarization waves and accurately determines the propagation direction of the Rayleigh wave, leading to significant improvement in the accuracy of elliptical polarizability exploration results. This provides a reference for obtaining high signal-to-noise ratio data in microtremor Rayleigh wave seismic exploration.
Subject
Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics,Materials Science (miscellaneous),Biophysics
Reference41 articles.
1. Ground-motion characteristics estimated from spectral ratio between horizontal and vertical components of microtremor[J];Konno;Bull Soc Am,1998
2. Deep shera-wave structure and earthquake ground motion characteristics in Sumiyoshi area, Kobe city, based on microtremor measurements[J];Tokimatsu;J Struct Constr Engng AIJ,1997
3. On the H/V spectrum[C];Nakamura,2008
4. Effects of Rayleigh and Love waves on microtremors H/V spectra[C];Arai,2000
5. Transmission of elastic waves through a stratified solid medium;Thomson;J Appl Phys,1950