(A) Structural cross-section B–B′ across the Gisakan Fold and MFF (location on Fig. 5). Focal mechanism of 1994 March 20 M_w = 5.1 event (Talebian & Jackson 2004) is plotted onto section. (B) Topography and inferred incision rates projected onto the cross-section. Note that the region of high incision rates extends further from the MFF than the frontal Gisakan fold.