@article{PAR00006606,
  title = {{C}oastal uplift and tsunami effects associated to the 2010 {M}(w)8.8 {M}aule earthquake in {C}entral {C}hile},
  author = {{V}argas, {G}. and {F}arias, {M}. and {C}arretier, {S}{\'e}bastien and {T}assara, {A}. and {B}aize, {S}. and {M}elnick, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}n {F}ebruary 27, 2010 at 03:34:08 {AM} an {M}(w)8.8 earthquake, with epicenter located off {C}obquecura (73.24 degrees {W}; 36.29 degrees {S}), severely hit {C}entral {C}hile. {T}he tsunami waves that followed this event affected the coastal regions between the cities of {V}alparaiso and {V}aldivia, with minor effects as far as {C}oquimbo. {T}he earthquake occurred along the subduction of the {N}azca oceanic plate beneath the {S}outh {A}merican plate. {C}oseismic coastal uplift was estimated through observations of bleached lithothamnioids crustose coralline algae, which were exposed after the mainshock between 34.13 degrees {S} and 38.34 degrees {S}, suggesting the latitudinal distribution of the earthquake rupture. {T}he measured coastal uplift values varied between 240 +/- 20 cm at sites closer to the trench along the western coast of the {A}rauco peninsula and 15 +/- 10 cm at sites located farther east. {A} maximum value of 260 +/- 50 cm was observed at the western coast of {S}anta {M}aria {I}sland, which is similar to the reported uplift associated with the 1835 earthquake at {C}oncepcion. {L}and subsidence values on the order of 0.5 m to 1 m evidenced a change in polarity and position of the coseismic hinge at 110-120 km from the trench. {I}n four sites along the coast we observed a close match between coastal uplift values deduced from bleached lithothamnioids algae and {GPS} measurements. {A}ccording to field observations tsunami heights reached ea. 14 m in the coastal area of the {M}aule {R}egion immediately north of the epicenter, and diminished progressively northwards to 4-2 m near {V}alparaiso. {A}long the coast of {C}obquecura, tsunami height values were inferior to 2-4 m. {M}ore variable tsunami heights of 6-8 m were measured at {D}ichato-{T}alcahuano and {T}irua-{P}uerto {S}aavedra, in the {B}iobio and {A}rauco regions, respectively, to the south of the epicenter. {A}ccording to eyewitnesses, the tsunami reached the coast between 12 to 20 and 30 to 45 minutes in areas located closer and faraway from the earthquake rupture zone, respectively. {D}estructive tsunami waves arrived also between 2.5 and 4.5 hours after the mainshock, especially along the coast of the {B}iobio and {A}rauco regions. {T}he tsunami effects were highly variable along the coast, as a result of geomorphological and bathymetric local conditions, besides potential complexities induced by the main shock.},
  keywords = {{M}(w)8.8 {M}aule earthquake ; {C}entral {C}hile ; {C}oseismic coastal uplift ; {T}sunami effect},
  booktitle = {},
  journal = {{A}ndean {G}eology},
  volume = {38},
  numero = {1},
  pages = {219--238},
  ISSN = {0718-7092},
  year = {2011},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00006606},
}