@article{fdi:010080457,
  title = {{T}riggered crustal earthquake swarm across subduction segment boundary after the 2016 {P}edernales, {E}cuador megathrust earthquake},
  author = {{H}oskins, {M}. {C}. and {M}eltzer, {A}. and {F}ont, {Y}vonne and {A}gurto-{D}etzel, {H}. and {V}aca, {S}. and {R}olandone, {F}. and {N}ocquet, {J}ean-{M}athieu and {S}oto-{C}ordero, {L}. and {S}tachnik, {J}. {C}. and {B}eck, {S}. and {L}ynner, {C}. and {R}uiz, {M}. and {A}lvarado, {A}. and {H}ernandez, {S}. and {C}harvis, {P}hilippe and {R}{\'e}gnier, {M}arc and {L}eon-{R}ios, {S}. and {R}ietbrock, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}egathrust ruptures and the ensuing postseismic deformation cause stress changes that may induce seismicity on upper plate crustal faults far from the coseismic rupture area. {I}n this study, we analyze seismic swarms that occurred in the north {E}cuador area of {E}smeraldas, beginning two months after the 2016 {M}-w 7.8 {P}edernales, {E}cuador megathrust earthquake. {T}he {E}smeraldas region is 70 km from the {P}edernales rupture area in a separate segment of the subduction zone. {W}e characterize the {E}smeraldas sequence, relocating the events using manual arrival time picks and a local a-priori 3{D} velocity model. {T}he earthquake locations from the {E}smeraldas sequence outline an upper plate fault or shear zone. {T}he sequence contains one major swarm and several smaller swarms. {M}oment tensor solutions of several events include normal and strike-slip motion and non-double-couple components. {D}uring the main swarm, earthquake hypocenters increase in distance from the first event over time, at a rate of a few hundred meters per day, consistent with fluid diffusion. {E}vents with similar waveforms occur within the sequence, and a transient is seen in time series of nearby {GPS} stations concurrent with the seismicity. {T}he events with similar waveforms and the transient in {GPS} time series suggest that slow aseismic slip took place along a crustal normal fault during the sequence. {C}oulomb stress calculations show a positive {C}oulomb stress change in the {E}smeraldas region, consistent with seismicity being triggered by the {P}edernales mainshock and large aftershocks. {T}he characteristics of the seismicity indicate that postseismic deformation involving fluid flow and slow slip activated upper plate faults in the {E}smeraldas area. {T}hese findings suggest the need for further investigation into the seismic hazard potential of shallow upper plate faults and the potential for megathrust earthquakes to trigger slow-slip and shallow seismicity across separate segments of subduction zones.},
  keywords = {triggered seismicity ; upper plate deformation ; postseismic deformation ; megathrust rupture ; earthquake swarm ; aftershocks ; {EQUATEUR}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {553},
  numero = {},
  pages = {116620 [13 p.]},
  ISSN = {0012-821{X}},
  year = {2021},
  DOI = {10.1016/j.epsl.2020.116620},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080457},
}