@article{fdi:010076657,
  title = {{I}maging rapid early afterslip of the 2016 {P}edernales earthquake, {E}cuador},
  author = {{T}sang, {L}. {L}. {H}. and {V}ergnolle, {M}. and {T}wardzik, {C}. and {S}laden, {A}. and {N}ocquet, {J}ean-{M}athieu and {R}olandone, {F}r{\'e}d{\'e}rique and {A}gurto-{D}etzel, {H}. and {C}avalie, {O}. and {J}arrin, {P}. and {M}othes, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{H}igh-{R}ate ({HR}) {GPS} time series following the 2016 {M}-w 7.8 {P}edernales earthquake suggest significant postseismic deformation occurring in the early postseismic period (i.e. first few hours after the earthquake) that is not resolved with daily {GPS} time series. {T}o understand the characteristics of early postseismic deformation, and its relationship with the mainshock rupture area, aftershocks and longer term postseismic deformation, we estimate the spatio-temporal distribution of early afterslip with {HR}-{GPS} time series that span similar to 2.5 min to 72 hr after the earthquake, and compare with afterslip models estimated with daily {GPS} time series spanning a similar postseismic time period and up to 30 days after the earthquake. {I}nversion of the {HR}-{GPS} time series enables us to image the initiation of afterslip in the initial hours after the earthquake, bringing us closer to the transition between the coseismic and postseismic phases. {T}he spatial signature of early afterslip in the region updip of the mainshock rupture area is consistent with longer-term afterslip that occurs in the 30-day postseismic period, indicating that afterslip initiated updip of and adjacent to peak coseismic slip asperities, in two localised areas, and subsequently continued to grow in amplitude with time in these specific areas. {A} striking difference, however, is that inversion of the 72-hour {HR}-{GPS} time series suggests early afterslip within the mainshock rupture area, but which may have been short-lived. {F}inally, using the first daily {GPS} position as the origin of the postseismic displacement (here at 12 hr after the earthquake) biases the postseismic geodetic moment, with similar to 60% missing over the first 72 hr, that corresponds to similar to 10% over the first 30 days. {T}he results of our study demonstrate that imaging the spatio-temporal evolution of afterslip using subdaily {GPS} time series is important for evaluating postseismic slip budgets, and provides additional insights into the postseismic slip behaviour of faults.},
  keywords = {afterslip ; postseismic ; subduction ; {P}edernales, {E}cuador ; aftershocks ; high-rate {GPS} time series ; {EQUATEUR}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {524},
  numero = {},
  pages = {115724 [12 ]},
  ISSN = {0012-821{X}},
  year = {2019},
  DOI = {10.1016/j.epsl.2019.115724},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076657},
}