Extended Data Fig. 2: PDFs for spatial extent of locked and creeping regions on the megathrust.
From: Long-lived shallow slow-slip events on the Sunda megathrust
PDFs for spatial extent of locked and creeping regions on the megathrust. a, Geometric setup and terminology used to describe the 4 segments of the megathrust: shallow creeping, frictionally locked, unlocked/transition zone and freely sliding plate boundary. b, PDFs of the spatial extent of ζup for two time periods (1738–1829 and 1829–1861) assuming steady frictional locking and creep governs the evolution of slip on the megathrust. Maximum aposteriori probability (MAP) of ζup for 1738–1829 is shown as green thick line (95 % confidence interval - thin green lines); MAP of ζup for 1829–1861 is shown as red thick line (95 % confidence interval - thin red lines). To explain the 1829–1861 coral observations with only steady interseismic processes, the upper limit of the locked zone ζup would have to migrate down-dip by 50–100 km while the (c) deeper transition zone ζdown would have to migrate to a depth of 50–60 km. d, The transition from ζdown to ζfree (W) would have to narrow to infinitesimal widths (pdf is maximum at W=0) making this model unphysical.
