Fig. 11

Strike-slip fault-type focal mechanism distribution in the study area. Almost the same as the right figure in Fig. 5 but normal fault-type and reverse fault-type events are omitted. The events of strike-slip faulting are concentrated close to the Butsuzo Tectonic Line (BTL), indicated by the blue dashed ellipse. The inserted diagram at upper right is a cross section of hypocenter distributions from the JMA catalog for the earthquakes in the long black rectangle in the map. The hypocenters in the blue rectangle in the cross section are aligned vertically, suggesting vertical faults