Fig. 6From: Causes of the N–S compressional aftershocks of the E–W compressional 2008 Iwate–Miyagi Nairiku earthquake (M7.2) in the northeastern Japan arca Histogram of Vp/Vs ratios estimated in this study and b–d examples of the data distributions. Slope of the red line represents the local Vp/Vs ratio for the cluster. Blue line is drawn as a reference whose slope is 1.73. Red texts represent the center of the longitude, latitude and depth ranges, and Vp/Vs ratio for the corresponding dataBack to article page