@article{fdi:010034369,
  title = {{A}re rupture zone limits of great subduction earthquakes controlled by upper plate structures ? : evidence from multichannel seismic reflection data acquired across the northern {E}cuador - southwest {C}olombia margin},
  author = {{C}ollot, {J}ean {Y}ves and {M}arcaillou,{B}. and {S}age, {F}. and {M}ichaud, {F}. and {A}gudelo, {W}. and {C}harvis, {P}hilippe and {G}raindorge, {D}. and {G}utscher, {M}.{A}. and {S}pence, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ubduction of the {N}azca plate beneath the {E}cuador {C}olombia margin has produced four megathrust earthquakes during the last century. {T}he 500 km long rupture zone of the 1906 ({M}w = 8.8) event was partially reactivated by three thrust events, in 1942 ({M}w = 7.8), 1958 ({M}w = 7.7), and 1979 ({M}w = 8.2), whose rupture zones abut one another. {M}ultichannel seismic reflection and bathymetric data acquired during the {SISTEUR} cruise show evidence that the margin wedge is segmented by transverse crustal faults that potentially correlate with the limits of the earthquake coseismic slip zones. {T}he {P}aleogene {N}eogene {J}ama {Q}uininde and {E}smeraldas crustal faults define a 200 km long margin crustal block that coincides with the 1942 earthquake rupture zone. {S}ubduction of the buoyant {C}arnegie {R}idge is inferred to partially lock the plate interface along central {E}cuador. {H}owever, coseismic slip during the 1942 and 1906 earthquakes may have terminated against the subducted northern flank of the ridge. {W}e report on a newly identified {M}anglares crustal fault that cuts transversally through the margin wedge and correlates with the limit between the 1958 and 1979 rupture zones. {D}uring the earthquake cycle the fault is associated with high stress concentration on the plate interface. {A}n outer basement high, which bounds the margin seaward of the 1958 rupture zone, may act as a deformable buttress to seaward propagation of coseismic slip along a megathrust splay fault. {C}oseismic uplift of the basement high is interpreted as the cause for the 1958 tsunami. {W}e propose a model of weak transverse faults which reduce coupling between adjacent margin segments, together with a splay fault and an asperity along the plate interface as controlling the seismogenic rupture of the 1958 earthquake.},
  keywords = {{SEISME} ; {SUBDUCTION} ; {MARGE} {CONTINENTALE} {ACTIVE} ; {FAILLE} ; {BATHYMETRIE} ; {SISMIQUE} {A} {REFLEXION} ; {PROFIL} {SISMIQUE} ; {VARIATION} {PLURIANNUELLE} ; {MODELISATION} ; {EQUATEUR} ; {COLOMBIE} ; {ANDES} ; {ESMARALDAS} {FAILLE} ; {MANGLARES} {FAILLE} ; {JAMA} {QUININDE} {FAILLE} ; {CARNEGIE} {REGION}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}easearch},
  volume = {109},
  numero = {},
  pages = {1--14},
  ISSN = {0148-0227},
  year = {2004},
  DOI = {10.1029/2004{JB}003060},
  URL = {https://www.documentation.ird.fr/hor/fdi:010034369},
}