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Earth, Planets and Space
Fig. 10 | Earth, Planets and Space

Fig. 10

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. 10

Comparison between observed and theoretical EHVSRs, and between observed and theoretical SRHSBs at six KiK-net strong-motion stations. In the panels of EHVSRs, black curves denote the observed EHVSRs, dashed blue curves denote the observed EHVSRs with a standard deviation, gray curves denote the EHVSRs evaluated with the initial underground velocity structures, and red curves denote the EHVSRs evaluated with the identified underground velocity structures from surface to half-space without cap layer. In the panels of SRHSBs, black curves denote the observed SRHSBs, dashed blue curves denote the observed SRHSBs within one standard deviation, gray curves denote the SRHSBs evaluated with the initial underground velocity structures from surface to bottom of boreholes, and red curves denote the SRHSBs evaluated with the underground velocity structures from surface to bottom of boreholes identified from SW H/Vs. The numerical values in black represent the objective function Em between observed and theoretical EHVSRs (or SRHSBs) evaluated with initial underground velocity structures, and the numerical values in red represent the objective function Em between observed and theoretical EHVSRs (or SRHSBs) evaluated with identified underground velocity structures

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