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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

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. 4

Results from a test of significance of the difference between the periods 1.16–0.98 days and 0.98–0 days prior to the M7.3 quake. a b values, b M c values, c σ values from 1.16 to 0.98 days. d b values, e M c values, f σ values from 0.98 to 0 days. g Δb, the difference in b values between the periods 1.16–0.98 and 0.98–0 days. h log P b , the logarithm of the probability that the b value for 1.16–0.98 days is different from the b value for 0.98–0 days. Red stars M6-class quakes (M6.5, M6.4), yellow star M7.3 quake, red lines surface traces of active faults, where Hinagu FZ and Futagawa FZ are designated

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