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Fig. 4 | Earth, Planets and Space

Fig. 4

From: Surface fault ruptures associated with the 14 April foreshock (Mj 6.5) of the 2016 Kumamoto earthquake sequence, southwest Japan

Fig. 4

Snapshots of surface ruptures related to the largest foreshock and mainshock at each site shown in Fig. 1c and/or Fig. 2. a Mole-track structures and open cracks, which first appeared associated with the largest foreshock and later enlarged due to the mainshock. b Two fault traces on an unpaved road, indicated by white arrows, between which a small depression appeared. Vertical offset of ca. 10 cm up on the north was identified across the two fault traces. c, d Five rupture traces with right-lateral offset of a paved road. Total amount of offset was 13–14 cm. eg A fault trace on a paved road with right-lateral offset of ca. 30 cm. h An open crack of a concrete block, whose width was ca. 5 cm after the largest foreshock and ca. 30 cm after the mainshock

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