Fig. 14From: Estimation of source, path, and site factors of S waves recorded at the S-net sites in the Japan Trench area using the spectral inversion techniquea Two-way travel time for P wave from the base of sediment to the seafloor estimated by multi-channel seismic (MCS) reflection survey (Nishizawa et al. 2022). The color filled squares and circles denote the sites located, within and beyond 5Â km from the survey line, respectively. The open squares denote the sites, where the travel times were not estimated. b, c, and d Amplification factors at frequencies of approximately 0.33, 1, and 5Â Hz, respectivelyBack to article page