Fig. 4From: Three-dimensional S-wave attenuation structure in and around source area of the 2018 Hokkaido Eastern Iburi Earthquake, JapanVertical cross-sections of Qs structures at 10 Hz. The black curves represent the upper boundary of the Pacific slab (Nakajima et al. 2009). Dashed lines in the inset map denote separate characteristics of surface topography, such as geological boundary or the Hidaka mountain ranges (HMR)Back to article page