Fig. 3: b-value dependency on the fault strength.

a Shear and normal stress distribution on a unit Mohr circle. Data plotted are events contained in spatial bins with stress tensor resolved. b b-value distribution on the unit Mohr circle. The colour in the circle indicates b-value as shown in the colour scale. c b-value for the angle θ from -σn defined in the upper inset. Vertical and horizontal bars indicate the standard error of the estimation and angular range on the area of the Mohr circle for estimating the b-value, respectively. The range of radius for the estimation is indicated as r. The upper inset shows the definition of coordinates on the Mohr circle.