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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Application of a simplified calculation for full-wave microtremor H/V spectral ratio based on the diffuse field approximation to identify underground velocity structures

Fig. 8

Profiles of underground velocity structures between the surface and the bottom of boreholes (upper) and H/Vs (lower) at six KiK-net strong-motion stations. In the upper panels, thin black lines show the profiles of initial underground velocity structures, light pink lines show the profiles of underground velocity structures identified during all the iterations, and thick black lines show the profiles of identified underground velocity structures. In the lower panels, thick black curves denote the observed H/Vs, thin black curves denote the SW H/Vs of initial cap-layered media, light pink curves denote the SW H/Vs of all identified cap-layered media during the iterations, red curves denote the SW H/Vs of identified cap-layered media, and cyan curves denote the FW H/Vs of identified layered media. The numerical values in black represent the objective function Em between observed H/Vs and SW H/Vs of initial cap-layered media, and the numerical values in red represent the objective function Em between observed H/Vs and SW H/Vs of identified cap-layered media

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