Fig. 11From: Directionally dependent horizontal-to-vertical spectral ratios of microtremors at Onahama, Fukushima, JapanLargest γ value and axes direction of the largest and smallest amplitude for the corresponding direction. Points for which the largest axis is oriented in the NS direction are aligned in the NS direction, and the points where largest axis is oriented in the EW direction are aligned in the EW direction, forming a T-shaped distributionBack to article page