Figure 6

Temporal evolution of the recurrence interval of the SSEs at the three subduction zone. Red circle indicates each occurrence of the SSE and elapsed time from the previous event. The black broken line illustrates fitted lines using the linear function. The slopes of the all fitted lines are negative: −2.90(±0.80) (month/year) for the Boso zone, −0.12(±0.10) (month/year) for the northern Cascadia zone, and −0.04(±0.08) (month/year) for the Yaeyama zone.