Fig. 2
From: Depth variation of seismic moment and recurrence interval in Japan
a The relationship between the logarithm of the seismic moment (the green curve indicates the total catalog, the red curve indicates the DMSI catalog, and the pink curve indicates the MMSI catalog following the left vertical axis, log10 [Nm]) and the logarithm of the seismic interval (the gray curve indicates the total catalog, the blue curve indicates the DMSI catalog, and the cyan curve indicates the MMSI catalog following the right vertical axis, log10 [s]), with Mw < 5 during the time interval from October 1, 1997 to February 28, 2015. The pink curve correlates well with the cyan curve. The pink open circles in the upper part indicate contemporaneous peripheral earthquakes (Mw > 5) within a distance of 500 km and with a moment following the left vertical axis, log10 [Nm]. The circle radii are proportional to the reciprocals of the hypocenter distances from the sphere center. b The relationship between the values of MMSI (red circles), DMSI (orange circles) and the seismic moments. The cyan line indicates the predicted Mo–SI distribution following Eq. 3, while the gray line indicates the predicted Mo–SI distribution following Eq. 4