Advances in the research of seismic-wave leaky modes

When seismic waves propagate in layered structures, dispersion phenomena occur. Based on the characteristics of dispersion curves, underground velocity structures can be estimated. Using the surface-wave dispersion curves extracted from seismic records and ambient noise for inversion is an important...

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Bibliographic Details
Published in:地球与行星物理论评 2025-01, Vol.56 (1), p.1-25
Main Authors: Caiwang Shi, Zhengbo Li, Xiaofei Chen
Format: Article
Language:Chinese
Subjects:
ambient noise
dispersion curve
leaky mode
velocity structure inversion
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Summary:When seismic waves propagate in layered structures, dispersion phenomena occur. Based on the characteristics of dispersion curves, underground velocity structures can be estimated. Using the surface-wave dispersion curves extracted from seismic records and ambient noise for inversion is an important method to constrain the structures of the near surface and lithosphere. In addition to surface waves, significant progress has been made in the research and application of leaky modes and their dispersion in recent years. Leaky modes can provide constraint information for velocity structure inversion, including P-wave velocity, and can compensate for the shortcomings of surface-wave dispersion inversion, which results in more accurate and comprehensive velocity modeling. However, in comparison to surface waves, the amplitude of leaky waves in seismic records and ambient noise is typically much weaker, which leads to significant challenges for the extraction of leaky modes. Furthermore, the study of leaky modes req
ISSN:2097-1893
DOI:10.19975/j.dqyxx.2024-005