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Fig. 9 | Progress in Earth and Planetary Science

Fig. 9

From: Geometrical dependence on the stress and slip tendency acting on the subduction megathrust of the Nankai seismogenic zone off Kumano

Fig. 9

a Slip tendency Ts shown as colored contours on a lower-hemisphere equal-angle stereographic chart, where the dip angle δ is taken along the radial axis, and the dip azimuth is taken along the azimuthal axis. Color corresponds to the amplitude of Ts, with r = 1.2 and λ* = 0.25 (λ = 0.7). The black dots indicate the dip angle and azimuth distribution for the picked fault. The triangle corresponds to the fault geometry below Site C0002. The plate slip direction is equal to the SH direction (N55W). The slip direction of the 2016 Mie-ken Nanto-Oki event was obtained from the Japan Meteorological Agency (JMA) and U.S. Geological Survey (USGS). b The critical pore-pressure ratio λ*cr is the value at which the slip likelihood (SL) becomes 1, assuming that the intrinsic friction coefficient is 0.6 and Phyd/Sv = 0.6

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