@article{fdi:010081340,
  title = {3{D} local earthquake tomography of the {E}cuadorian margin in the source area of the 2016 {M}w 7.8 {P}edernales earthquake},
  author = {{L}eon-{R}ios, {S}. and {B}ie, {L}. {D}. and {A}gurto-{D}etzel, {H}. and {R}ietbrock, {A}. and {G}alve, {A}. and {A}lvarado, {A}. and {B}eck, {S}. and {C}harvis, {P}hilippe and {F}ont, {Y}vonne and {H}idalgo, {S}. and {H}oskins, {M}. and {L}aigle, {M}. and {O}regioni, {D}. and {M}eltzer, {A}. and {R}uiz, {M}. and {W}oollam, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}ased on manually analyzed waveforms recorded by the permanent {E}cuadorian network and our large aftershock deployment installed after the {P}edernales earthquake, we derive three-dimensional {V}p and {V}p/{V}s structures and earthquake locations for central coastal {E}cuador using local earthquake tomography. {I}mages highlight the features in the subducting and overriding plates down to 35 km depth. {V}p anomalies (similar to 4.5-7.5 km/s) show the roughness of the incoming oceanic crust ({OC}). {V}p/{V}s varies from similar to 1.75 to similar to 1.94, averaging a value of 1.82 consistent with terranes of oceanic nature. {W}e identify a low {V}p (similar to 5.5 km/s) region extending along strike, in the marine forearc. {T}o the {N}orth, we relate this low {V}p and {V}p/{V}s (<1.80) region to a subducted seamount that might be part of the {C}arnegie {R}idge ({CR}). {T}o the {S}outh, the low {V}p region is associated with high {V}p/{V}s (>1.85) which we interpret as deeply fractured, probably hydrated {OC} caused by the {CR} being subducted. {T}hese features play an important role in controlling the seismic behavior of the margin. {W}hile subducted seamounts might contribute to the nucleation of intermediate megathrust earthquakes in the northern segment, the {CR} seems to be the main feature controlling the seismicity in the region by promoting creeping and slow slip events offshore that can be linked to the updip limit of large megathrust earthquakes in the northern segment and the absence of them in the southern region over the instrumental period.},
  keywords = {aftershocks ; {E}cuador ; megathrust earthquake ; seismic tomography ; subduction zone ; velocity structure ; {EQUATEUR} ; {PEDERNALES}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {126},
  numero = {3},
  pages = {e2020{JB}020701 [21 p.]},
  ISSN = {2169-9313},
  year = {2021},
  DOI = {10.1029/2020jb020701},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081340},
}