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Earth, Planets and Space
Fig. 13 | Earth, Planets and Space

Fig. 13

From: Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock

Fig. 13

Local seismotectonics causing stress heterogeneity in the source region of the 2013 Awaji Island earthquake. A yellow star shows the hypocenter of the mainshock. The red lines show the surface traces of active faults (Nakata and Imaizumi 2002), and the black lines show Ichinomiya and Ayukawa flexures (Takahashi et al. 1992). The red and black arrows show the orientation of the maximum principal stress in the source region and in the surrounding area, respectively. Blue circles represent the on-fault aftershocks. The line X–Y is perpendicular to the strike of the mainshock fault plane. Topography is based on a 10 m grid digital elevation model published by the Geospatial Information Authority of Japan

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