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Earth, Planets and Space
Fig. 19 | Earth, Planets and Space

Fig. 19

From: Unified approach for evaluation of horizontal site amplification factors with special reference to history of studies on the effects of surface geology on seismic motion

Fig. 19

Based on the distributed data of microtremors for the blind prediction experiment during the ESG6 symposium in 2021, we compare the observed MHVR (green), the converted pEHVR from MHVR (red), and the observed EHVR (blue) from aftershock records disclosed after the blind prediction on the left. On the right, we compare the resultant S-wave velocity profiles inverted for pEHVR (red) and EHVR (blue), shown in Nagashima et al. (2023). The profile with an orange line is the preferred model distributed by the committee of the blind prediction (Matsushima et al. 2021, 2022) constructed by the boring data down to 38 m and the deep structure proposed by Senna et al. (2018). The inclined dashed and dotted lines on the velocity models show resonant frequencies of the corresponding layer interfaces based on the one-quarter wavelength law

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