Fig. 9

Snapshots of slip velocities on the fault for parameter sets B and C. Green line shows the slip velocity at the beginning of the mainshock, when the average slip velocity exceeds 1 mm/s, corresponding to the insets in Fig. 5a. The blue and magenta lines are snapshots when the averaged slip exceeds 1 cm/s and reaches its maximum, respectively. The red line is a snapshot taken 1 s before the beginning of the mainshock