Fig. 5

a Distribution of surface ruptures, previously mapped fault traces, and location of photographs (black dots) in the central and northeastern sections of the Futagawa segment of the Futagawa fault zone (Fig. 1C). b Surface rupture (red half-arrows) crossing a road at Nishihara. South side was upthrown and displaced to the southwest by reverse and dextral faulting. c Array of left-stepping tension cracks (white arrows) south of Nishihara related to dextral and normal faulting on the hillside. d Surface rupture crossing a road at the Okirihata dam showing dextral slip. e Surface rupture at Komori with the north side downthrown by normal faulting. f Surface rupture crossing the bridge at Oginosaka which was compressed by dextral faulting (red arrows). g Surface ruptures at Kawayo showing dextral offset of a field and footpath. h A small graben crossing a road, defined by surface ruptures in the foreground and background. i Surface ruptures and fissures (red lines) near the Nigorigawa River that defined small grabens