Artifacts in High-Frequency Passive Surface Wave Dispersion Imaging: Toward the Linear Receiver Array

Cheng, Feng; Xia, Jianghai; Xi, Chaoqiang

doi:10.1007/s10712-023-09772-1

Cited by 10 publications

(1 citation statement)

References 130 publications

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“…Dispersive energy imaging is a key step in the multichannel analysis of surface waves (MASW) (Y. Hu et al., 2018; Cheng et al., 2023). The high‐resolution, efficiency and anti‐interference of dispersive energy imaging forms the basis for the practical application of MASW.…”

Section: Introductionmentioning

confidence: 99%

Efficient and high‐resolution surface‐wave dispersive energy imaging using a proposed spatial smoothing propagation method

He,

Peng,

Geng

2024

Near Surface Geophysics

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Surface‐wave information from seismic data can be used for near‐surface analysis, static computation and noise suppression. The multichannel analysis of surface waves method is a useful approach for obtaining the shear wave velocity of the near surface; however, rapidly generating an image of dispersive energy in the presence of coherent noise is a challenge. In this study, we propose the imaging of the dispersive energy of the Rayleigh wave using a spatial smoothing propagation method. In this method, forward and backward spatial smoothing algorithms were used to restore the rank of the covariance matrix in strong coherent noise. Subsequently, an image of the dispersive energy was rapidly generated by the propagation method using a linear operation equivalent to the eigenvalue decomposition. The proposed method was evaluated using both synthetic and field data. The results showed that the method was easy to use and has higher resolution representation, efficiency and noise robustness compared with conventional methods.

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Section: Introductionmentioning

confidence: 99%

Efficient and high‐resolution surface‐wave dispersive energy imaging using a proposed spatial smoothing propagation method

He,

Peng,

Geng

2024

Near Surface Geophysics

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Improving the Retrieval of High-Frequency Surface Waves Using Convolution-Based Three-Station Interferometry for Dense Linear Arrays

Guan,

Xia,

Liu

et al. 2023

Surv Geophys

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Rayleigh wave attenuation tomography based on ambient noise interferometry: methods and an application to Northeast China

Peng,

2024

Geophysical Journal International

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Summary Although ambient noise interferometry has been extensively utilized for seismic velocity tomography, its application in retrieving attenuation remains limited. This study presents a comprehensive workflow for extracting Rayleigh wave amplitude and attenuation from ambient noise, which consists of three phases: (1) retrieval of empirical Green's Functions (EGFs), (2) selection and correction of amplitude measurements, and (3) inversion of attenuation, site amplification, and noise intensity terms. Throughout these processes, an ‘asynchronous’ temporal flattening method is employed to generate high-quality EGFs while preserving relative amplitudes between stations. Additionally, a novel “t-symmetry” criterion is proposed for data selection along with the signal-to-noise ratio. Furthermore, 2-D sensitivity kernels are utilized to estimate the focusing/defocusing effect, which is then corrected in amplitude measurements. These procedures are designed to deliver reliable attenuation measurements while maintaining flexibility and automation. To validate the effectiveness of the proposed noise-based attenuation tomography approach, we apply it to a linear array, NCISP-6, located in NE China. The obtained results correlate reasonably well with known geological structures. Specifically, at short periods, high attenuation anomalies delineate the location of major sedimentary basins and faults; while at longer periods, a notable rapid increase of attenuation is observed beneath the Moho discontinuity. Given that attenuation measurements are more sensitive to porosity, defect concentration, temperature, melt, and volatile ratio than seismic velocities, noise-based attenuation tomography provides important additional constraints for exploring the crustal and upper mantle structures.

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Artifacts in High-Frequency Passive Surface Wave Dispersion Imaging: Toward the Linear Receiver Array

Cited by 10 publications

References 130 publications

Efficient and high‐resolution surface‐wave dispersive energy imaging using a proposed spatial smoothing propagation method

Efficient and high‐resolution surface‐wave dispersive energy imaging using a proposed spatial smoothing propagation method

Improving the Retrieval of High-Frequency Surface Waves Using Convolution-Based Three-Station Interferometry for Dense Linear Arrays

Rayleigh wave attenuation tomography based on ambient noise interferometry: methods and an application to Northeast China

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