Fig. 8
Plot of the differential strain rate observed by GPS (Sagiya et al., 2000) versus the average normalized time delay at stations whose angular difference between the average orientation of faster shear waves and the orientation of the principal compression axis of the strain rate is within 30° and the data number is greater than or equal to 3 that are shown by black bars in Fig. 7. The dashed line is the least squares fit to the data (normalized time delay (ms/km) = −1.2 + 35.9 × differential strain rate (ppm/yr)). Gray lines represent the definition of δtn and Δδtn in Eq. (2).