Fig. 10From: Directionally dependent horizontal-to-vertical spectral ratios of microtremors at Onahama, Fukushima, JapanTransition of γ according to the axes rotation angle. For points C3 and G3, γ is largest close to 0° and remains large over an angular range of about 70°. In contrast, at point H3, γ is relatively small throughout whole angular rangeBack to article page