@article{fdi:010077077,
  title = {1{D}-velocity structure and seismotectonics of the {E}cuadorian margin inferred from the 2016 {M}w7.8 {P}edernales aftershock sequence},
  author = {{L}eon-{R}ios, {S}. and {A}gurto-{D}etzel, {H}. and {R}ietbrock, {A}. and {A}lvarado, {A}. and {B}eck, {S}. and {C}harvis, {P}hilippe and {E}dward, {B}. and {F}ont, {Y}vonne and {G}arth, {T}. and {H}oskins, {M}. and {L}ynner, {C}. and {M}eltzer, {A}. and {N}ocquet, {J}. {M}. and {R}{\'e}gnier, {M}arc and {R}olandone, {F}r{\'e}d{\'e}rique and {R}uiz, {M}. and {S}oto-{C}ordero, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}n {A}pril 16th 2016 a {M}w 7.8 earthquake ruptured the central coastal segment of the {E}cuadorian subduction zone. {S}hortly after the earthquake, the {I}nstitute {G}eofisico de la {E}scuela {P}olitecnica {N}acional of {E}cuador, together with several international institutions deployed a dense, temporary seismic network to accurately categorize the post-seismic aftershock sequence. {I}nstrumentation included short-period and broadband sensors, along with {O}cean {B}ottom {S}eismometers. {T}his deployment complemented the permanent {E}cuadorian seismic network and recorded the developing aftershock sequence for a period of one year following the main-shock. {A} subset of 345 events with {M}-{L} > 3.5, were manually picked in the period of {M}ay to {A}ugust 2016, providing highly accurate {P}- and {S}-onset times. {F}rom this catalogue, a high-quality dataset of 227 events, with an azimuthal gap < 200 degrees, are simultaneously inverted for, obtaining the minimum 1{D} velocity model for the rupture region, along with hypocentral locations and station corrections. {W}e observe an average {V}p/{V}s of 1.82 throughout the study region, with relatively higher {V}p/{V}s values of 1.95 and 2.18 observed for the shallowest layers down to 7.5 km. {T}he high relative {V}p/{V}s ratio (1.93) of the deeper section, between 30 km and 40 km, is attributed to dehydration and serpentinization processes. {F}or the relocated seismicity distribution, clusters of events align perpendicular to the trench, and crustal seismicity is also evidenced, along with earthquakes located close to the trench axis. {W}e also compute {R}egional {M}oment {T}ensors to analyze the different sources of seismicity after the mainshock. {A}side from thrust events related to the subduction process, normal and strike-slip mechanisms are detected. {W}e suggest that the presence of subducting seamounts coming from the {C}amegie {R}idge act as erosional agents, helping to create a scenario which promotes locking and allows seismicity to extend up to the trench, along zones of weakness activated after large earthquakes.},
  keywords = {2016 {P}edernales earthquake ; {E}cuador ; {V}elocity model ; {S}ubduction zone ; {R}egional moment tensor ; {A}ftershock sequence ; {EQUATEUR}},
  booktitle = {},
  journal = {{T}ectonophysics},
  volume = {767},
  numero = {},
  pages = {art. 228165 [13 p.]},
  ISSN = {0040-1951},
  year = {2019},
  DOI = {10.1016/j.tecto.2019.228165},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077077},
}