@article{fdi:010085977, title = {{F}rom long- to short-term inter-plate coupling at the subducted {C}arnegie {R}idge crest, offshore {C}entral {E}cuador}, author = {{C}ollot, {J}ean-{Y}ves and {P}roust, {J}. {N}. and {N}ocquet, {J}ean-{M}athieu and {M}artillo, {C}. and {M}ichaud, {F}. and {L}ebrun, {J}. {F}. and {S}chenini, {L}aure and {P}opescu, {S}. and {H}ernandez, {M}. {J}. and {R}atzov, {G}.}, editor = {}, language = {{ENG}}, abstract = {{W}e investigate the relationship between the long-term ({Q}uaternary) interplate coupling and the short-term geodetically derived interseismic coupling at the {C}entral {E}cuador subduction zone. {A}t this nonaccretionary margin, the {C}abo {P}asado shelf promontory and coastal area are associated with two inter-plate geodetically locked patches. {T}he deepest patch ruptured co-seismically during the {M}w7.8-2016 {P}edernales earthquake, while the shallowest underwent dominantly after-slip. {M}arine geophysical and chronostratigraphic data allow reconstructing the {Q}uaternary tectonic evolution of the shelf promontory and substantiating variation of the long-term inter-plate coupling that led to the geodetically locked patches. {P}rior to similar to 1.8 {M}a, the outer-wedge inter-plate coupling was strong enough to activate trench-subparallel strike-slip faults. {T}hen, between similar to 1.8 and 0.79 {M}a, shortening and uplift affected the shelf promontory, implying a locally increased inter-plate coupling. {A}fter a short, post-0.79 {M}a period of subsidence, shortening and uplift resumed denoting a high inter-plate coupling that endured up to the present. {T}he synchronicity of the structural evolution of the shelf promontory with the subduction chronology of two reliefs of the {C}arnegie {R}idge crest suggests that the locked patches are caused by a geometrical resistance to subduction that propagates landward causing permanent deformation. {I}n 2016, the deepest subducted relief localized stress accumulation and high seismic slip, while the shallowest relief, which is associated with a weakened outer-wedge, prevented updip rupture propagation. {T}hus, at nonaccretionary margins, active outer-wedge strike-slip faults might be considered a proxy of near-trench coupling, and subducted relief a cause of plate coupling but an obstacle to the tsunami genesis when the relief is shallow.}, keywords = {{EQUATEUR} ; {ANDES} ; {CARNEGIE} {RIDE}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth}, volume = {127}, numero = {8}, pages = {e2022{JB}024192 [26 ]}, ISSN = {2169-9313}, year = {2022}, DOI = {10.1029/2022jb024192}, URL = {https://www.documentation.ird.fr/hor/fdi:010085977}, }