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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

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. 5

a The epicentral map of earthquakes that occurred during the period from the M6.5 quake to the M7.3 quake. Events marked by dark gray squares were used to create the cross-sectional view in b and the magnitude–time diagram in c. 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. b Cross-sectional view of the seismicity. Apart from the majority of the events, outliers (bold squares) can also be observed around the hypocenter of the M7.3 quake. c M as a function of the time (days) until the M7.3 quake (vertical solid line). Outliers seen in b are designated by bold squares. Vertical dashed lines 0.98 days and 0.67 days before the M7.3 quake

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