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

IF 1.1 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Tao He, Suping Peng, Henggao Geng
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引用次数: 0

Abstract

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.
利用拟议的空间平滑传播方法实现高效、高分辨率面波色散能量成像
地震数据中的面波信息可用于近地表分析、静力计算和噪声抑制。多道面波分析方法是获取近地表剪切波速度的有效方法;然而,在存在相干噪声的情况下快速生成色散能量图像是一项挑战。在本研究中,我们提出了利用空间平滑传播方法对雷利波的色散能量进行成像。在这种方法中,使用了前向和后向空间平滑算法来恢复强相干噪声中协方差矩阵的秩。随后,利用相当于特征值分解的线性运算,通过传播方法快速生成色散能量图像。利用合成数据和现场数据对所提出的方法进行了评估。结果表明,与传统方法相比,该方法易于使用,具有更高的分辨率、效率和噪声鲁棒性。
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来源期刊
Near Surface Geophysics
Near Surface Geophysics 地学-地球化学与地球物理
CiteScore
3.60
自引率
12.50%
发文量
42
审稿时长
6-12 weeks
期刊介绍: Near Surface Geophysics is an international journal for the publication of research and development in geophysics applied to near surface. It places emphasis on geological, hydrogeological, geotechnical, environmental, engineering, mining, archaeological, agricultural and other applications of geophysics as well as physical soil and rock properties. Geophysical and geoscientific case histories with innovative use of geophysical techniques are welcome, which may include improvements on instrumentation, measurements, data acquisition and processing, modelling, inversion, interpretation, project management and multidisciplinary use. The papers should also be understandable to those who use geophysical data but are not necessarily geophysicists.
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