Fig. 5From: Directionally dependent horizontal-to-vertical spectral ratios of microtremors at Onahama, Fukushima, JapanComparison of MHVRs along Line-4 shown in Fig. 2b. The figures from top-left to bottom-right are aligned from east to west on the survey line. Red and blue lines indicate NS/UD and EW/UD, respectively. The difference between the two is significant for points 4-1 to 4-11. The value of γ for each point is denoted in the right-top cornerBack to article page