Dataset of P- and S-wave Velocity Structures in Japan

This dataset includes mainly P- and S-wave velocity structures derived using diffuse field concept for earthquakes at 1744 K-NET and KiK-net sites. Additionally, we include the peak fundamental and predominant frequencies and the associated correlation coefficients and residuals between the observed and theoretical horizontal-to-vertical spectral ratios for earthquakes. This dataset could be used to detect the effective bedrock depths, as well as to estimate the site amplification factors.