@article{fdi:010078994,
  title = {{U}pper-plate structure in {E}cuador coincident with the subduction of the {C}arnegie {R}idge and the southern extent of large mega-thrust earthquakes},
  author = {{L}ynner, {C}. and {K}och, {C}. and {B}eck, {S}. {L}. and {M}eltzer, {A}. and {S}oto-{C}ordero, {L}. and {H}oskins, {M}. {C}. and {S}tachnik, {J}. {C}. and {R}uiz, {M}. and {A}lvarado, {A}. and {C}harvis, {P}hilippe and {F}ont, {Y}vonne and {R}{\'e}gnier, {M}arc and {A}gurto-{D}etzel, {H}. and {R}ietbrock, {A}. and {P}orritt, {R}. {W}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {E}cuadorian convergent margin has experienced many large mega-thrust earthquakes in the past century, beginning with a 1906 event that propagated along as much as 500 km of the plate interface. {M}any subsections of the 1906 rupture area have subsequently produced {M}-w >= 7.7 events, culminating in the 16 {A}pril 2016, {M}-w 7.8 {P}edernales earthquake. {I}nterestingly, no large historic events {M}-w >= 7.7 appear to have propagated southward of similar to 1 degrees {S}, which coincides with the subduction of the {C}arnegie {R}idge. {W}e combine data from temporary seismic stations deployed following the {P}edernales earthquake with data recorded by the permanent stations of the {E}cuadorian national seismic network to discern the velocity structure of the {E}cuadorian forearc and {C}ordillera using ambient noise tomography. {A}mbient noise tomography extracts {V}-sv information from the ambient noise wavefield and provides detailed constraints on velocity structures in the crust and upper mantle. {I}n the upper 10 km of the {E}cuadorian forearc, we see evidence of the deepest portions of the sedimentary basins in the region, the {P}rogreso and {M}anabi basins. {A}t depths below 30 km, we observe a sharp delineation between accreted fast forearc terranes and the thick crust of the {E}cuadorian {A}ndes. {A}t depths similar to 20 km, we see a strong fast velocity anomaly that coincides with the subducting {C}arnegie {R}idge as well as the southern boundary of large mega-thrust earthquakes. {O}ur observations raise the possibility that upper-plate structure, in addition to the subducting {C}arnegie {R}idge, plays a role in the large event segmentation seen along the {E}cuadorian margin.},
  keywords = {{C}rustal imaging ; {S}eismic noise ; {C}rustal structure ; {EQUATEUR} ; {PROGRESO} {BASSIN} ; {MANABI} {BASSIN}},
  booktitle = {},
  journal = {{G}eophysical {J}ournal {I}nternational},
  volume = {220},
  numero = {3},
  pages = {1965--1977},
  ISSN = {0956-540{X}},
  year = {2020},
  DOI = {10.1093/gji/ggz558},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078994},
}