Back to full interseismic plate locking decades after the giant 1960 Chile earthquake.

ABSTRACT: Great megathrust earthquakes arise from the sudden release of energy accumulated during centuries of interseismic plate convergence. The moment deficit (energy available for future earthquakes) is commonly inferred by integrating the rate of interseismic plate locking over the time since the previous great earthquake. But accurate integration requires knowledge of how interseismic plate locking changes decades after earthquakes, measurements not available for most great earthquakes. Here we reconstruct the post-earthquake history of plate locking at Guafo Island, above the seismogenic zone of the giant 1960 (M_w = 9.5) Chile earthquake, through forward modeling of land-level changes inferred from aerial imagery (since 1974) and measured by GPS (since 1994). We find that interseis

SUBMITTER: Melnick D 

PROVIDER: S-EPMC6117256 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature