@article{fdi:010086412,
  title = {{S}elf-reactivated rupture during the 2019 {M}w=8 northern {P}eru intraslab earthquake},
  author = {{V}allee, {M}. and {X}ie, {Y}. {Q}. and {G}randin, {R}. and {V}illegas-{L}anza, {J}. {C}. and {N}ocquet, {J}ean-{M}athieu and {V}aca, {S}. and {M}eng, {L}. {S}. and {A}mpuero, {J}ean-{P}aul and {M}othes, {P}. and {J}arrin, {P}. and {F}arfan, {C}. {S}. and {R}olandone, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he 2019/05/26 {N}orthern {P}eru earthquake ({M}w = 8) is a major intermediate-depth earthquake that occurred close to the eastern edge of the {N}azca slab flat area. {W}e analyze its rupture process using high -frequency back-projection and seismo-geodetic broadband inversion. {T}he latter approach shows that the earthquake propagated with almost purely normal faulting along the 60 degrees eastward dipping plane. {B}oth imaging techniques provide a very consistent image of the peculiar space-time rupture process of this earthquake: its 60-second long rupture is characterized both by a main northward propagation (resulting in a rupture extent of almost 200 km in this direction) and by a reactivation phase of the hypocentral area, particularly active 35 s to 50 s after origin time. {G}iven the depth of this earthquake (125-140 km), the reactivation time window coincides with the arrival time of the surface-reflected elastic wavefield. {C}omputed values of the dynamic {C}oulomb stresses associated with this wavefield are of the order of ten to several tens of k{P}a, in a range of values where dynamic triggering has already been observed. {T}he reactivation phase of the {P}eru earthquake may thus originate from fault areas that were brought close to rupture by the initial rupture front before being triggered by stress increments provided by the reflected wavefield. {S}ource time function complexity observed for other large intermediate-depth earthquakes further suggests that such a mechanism is not an isolated case.},
  keywords = {rupture propagation ; dynamic triggering ; array analysis ; seismic source ; inversion ; intermediate depth earthquake ; {N}azca slab ; {PEROU}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {601},
  numero = {},
  pages = {117886 [10 ]},
  ISSN = {0012-821{X}},
  year = {2023},
  DOI = {10.1016/j.epsl.2022.117886},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086412},
}