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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Anomalous decrease in relatively large shocks and increase in the p and b values preceding the April 16, 2016, M7.3 earthquake in Kumamoto, Japan

Fig. 3

Number λ (day−1) of M ≥ 3 earthquakes in the entire area as a function of t (days) from the M6.5 quake. Fitting of the OU law to seismicity in the periods t = 0–0.18 (blue), 0–0.49 (green), and 0–1.16 (red) results in (p, c) = (0.46 ± 0.14, 0.00 ± 0.00), (0.99 ± 0.26, 0.02 ± 0.02), and (1.49 ± 0.29, 0.06 ± 0.04), respectively, where c (days) is a constant of the OU law. Inset p value as a function of the length of the analyzed period (days) since the M6.5 quake for seismicity in the entire area (black), in the northern area (cyan), and in the southern area (pink)

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