Fig. 2From: Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, JapanObserved phase velocities at each site obtained by the SPAC method. The red, green, and blue circles display the measured phase velocities for each dataset from L, S, and N array, respectively. The solid line represents the phase velocity dispersion curve obtained by combining the phase velocities from all datasets of all arraysBack to article page