Fig. 9From: Directionally dependent horizontal-to-vertical spectral ratios of microtremors at Onahama, Fukushima, JapanComparison of directionally dependent coefficient γ of MHVRs in the frequency range of 1 to 6 Hz for points on Line-A to Line-I and Line-3 to Line-4. A higher value of γ indicates a stronger directional dependence. In particular, the difference is noticeable if γ exceeds 0.7, and the difference is significant if γ exceeds 1.0Back to article page