Estimating frequency-dependent shear wave velocity in near-surface sediment based on seismic interferometry

Earth, Planets and Space

Full Paper

Hongjun He¹  Hanwen Ji¹  Yang Shi¹  Hao Zhang¹  Yu Miao² 

[1] School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China;School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China;National Center of Technology Innovation for Digital Construction, 430074, Wuhan, China;

关键词: Seismic shear wave;    Seismic interferometry;    KiK-net;    Dispersion;    Near-surface sediment;   

DOI  :  10.1186/s40623-023-01918-0

 received in 2023-05-22, accepted in 2023-10-05,  发布年份 2023

来源: Springer

【 摘 要 】

Near-surface seismic shear wave is a basic tool for seismic investigations. However, its frequency-dependent property is not fully investigated, especially by the in situ observation method. Here, we develop the seismic interferometry with a moving frequency window to process the natural seismic signals recorded by the KiK-net network. It is observed that the phase velocity of the shear wave decreases sharply as the frequency increases in the low-frequency range, and remains constant in the high-frequency range. The observed dispersion phenomenon presents a challenge to existing site effect prediction theories, while also providing an observational reference for understanding how the shear wave propagates in near-surface sediment.Graphical Abstract

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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