Fig. 8
From: Structural control and system-level behavior of the seismic cycle at the Nankai Trough
Contribution of fault slip and upper-mantle flow to vertical and trench-perpendicular surface displacements throughout the seismic cycle. a Megathrust slip instabilities and locking are distributed in space and time. b Fault slip produces seaward displacement above the megathrust and small landward displacement in the outer rise (denoted by arrows). Fault slip also produces significant uplift in the forearc region above the major rupture area and subsidence outside this region. Small coseismic subsidence close to the landward side the trench is caused by the locking in the shallowest portion of the megathrust (background color). c Postseismic viscoelastic flow in the asthenosphere following full ruptures produces landward displacement (white arrows) on the seaside of the mantle wedge corner and seaward displacement on the other side. Uplift is found above the rupture area and most of the mantle wedge. Viscoelastic subsidence is found mostly above the metamorphic belt and in the outer rise