Fig. 15From: Unified approach for evaluation of horizontal site amplification factors with special reference to history of studies on the effects of surface geology on seismic motionWSRh (top) and WSRv (bottom) maps for the whole Japan at 0.5Â Hz and 1.0Â Hz based on the GIT by Nakano (2021). Red dotted curves are the approximate location of the Itoigawa-Shizuoka tectonic line. Interpolation is done by GMT (Smith and Wessel 1990)Back to article page