Resolution of High-frequency Rayleigh-wave Data

2005 ◽  
Vol 10 (2) ◽  
pp. 99-110 ◽  
Author(s):  
J. Xia ◽  
C. Chen ◽  
G. Tian ◽  
R. D Miller ◽  
J. Ivanov
Keyword(s):  
Rayleigh Wave ◽  
High Frequency ◽  
Wave Data

Sensitivity of high‐frequency Rayleigh‐wave data revisited

2007 ◽  
Author(s):  
Jianghai Xia ◽  
Richard D. Miller ◽  
Julian Ivanov
Keyword(s):  
Rayleigh Wave ◽  
High Frequency ◽  
Wave Data

The 3-D Structure of Shear Waves in the Crust and Uppermantle Beneath East Chinese Continen-tal Inverted by Rayleigh Wave Data

2000 ◽  
Vol 43 (3) ◽  
pp. 395-406 ◽  
Author(s):  
Guo-Ming XU ◽  
Guang-Pin LI ◽  
Shan-En WANG ◽  
Hong CHEN ◽  
Hu-Shun ZHOU
Keyword(s):  
Rayleigh Wave ◽  
Shear Waves ◽  
Wave Data

Combination of Active and Passive Seismic Analyses for Embankment Characterization

2015 ◽  
Vol 771 ◽  
pp. 179-182 ◽  
Author(s):  
Yekti Widyaningrum ◽  
Sungkono ◽  
Alwi Husein ◽  
Bagus Jaya Santosa ◽  
Ayi S. Bahri
Keyword(s):  
Rayleigh Wave ◽  
High Frequency ◽  
Low Frequency ◽  
Wave Dispersion ◽  
Standard Penetration Test ◽  
Near Surface ◽  
Combining Data ◽  
Passive Seismic ◽  
Estimate Dispersion ◽  
Rayleigh Wave Dispersion

Rayleigh wave dispersion is intensively used to determine near surface of shear wave velocity (Vs). The method has been known as non-invasive techniques which is costly effective and efficient to characterize subsurface. Acquisition of the Rayleigh wave can be approached in two ways, i.e. passive and active. Passive seismic is accurate to estimate dispersion curve in low frequency, although it is not accurate for high frequency. While active seismic is vice versa of passive seismic. The high frequency of Rayleigh wave dispersion reflects to near surface and vice versa. Therefore, we used the combination of both passive and active seismic method to overcome the limitations of each method. The Vs which is resulted by inversion of the combining data gives accurate model if compared to log and standard penetration test (N-SPT) data. Further, the approach has been used to characterize LUSI (Lumpur Sidoarjo) embankments. The result shows that embankment material (0-12 m) has higher Vs than that lower embankment material.

scholarly journals Research and Application of Rayleigh Wave 3-D Phase Velocity Imaging Based on Wavelet Transform

2021 ◽  
Vol 64 (1) ◽  
Author(s):  
Xiang Min ◽  
Qi Xinghua ◽  
Zhang Fengwei
Keyword(s):  
Wavelet Transform ◽  
Phase Velocity ◽  
Data Processing ◽  
Rayleigh Wave ◽  
Wave Velocity ◽  
Frequency Component ◽  
Singular Value ◽  
Processing Method ◽  
Wave Data ◽  
Data Processing Method

Rayleigh wave detection is a recently developed method for shallow seismic exploration. Current Rayleigh wave data processing and interpretation methods can only provide the transverse average wave velocity of rock-soil bodies under the geophone array range, resulting in a low lateral resolution of wave velocity. To solve this problem, this paper presents a Rayleigh wave data processing method based on wavelet transform. First, the Hankel matrix is constructed from the intercepted Rayleigh wave, and the effective singular value is preserved by singular value decomposition to filter the Rayleigh wave. Then, the appropriate center frequency is selected and the corresponding relationship between the time and frequency of the Rayleigh wave is obtained via wavelet transform. The waveform of each frequency component can be extracted and the complete time difference of each frequency component between two geophones will be obtained and used to calculate the phase velocity-depth profile of the Rayleigh wave in a rock-soil body. This method is applied to examine unfavorable geological bodies that are underground in a yard. By combining the phase velocity-depth profiles of several survey lines, the 3-D image of phase velocity of Rayleigh wave underground can be obtained. This method can provide the phase velocity distribution of the formation below the survey line by only one measurement, which greatly improves upon the work efficiency and lateral resolution of the traditional Rayleigh wave data processing method.

Effect of near-surface topography on high-frequency Rayleigh-wave propagation

2015 ◽  
Vol 116 ◽  
pp. 93-103 ◽  
Author(s):  
Limin Wang ◽  
Yixian Xu ◽  
Jianghai Xia ◽  
Yinhe Luo
Keyword(s):  
Wave Propagation ◽  
Rayleigh Wave ◽  
Surface Topography ◽  
High Frequency ◽  
Near Surface
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