Khazaradze, GiorgiWang, K.Klotz, J.Hu, Y.He, J.2020-05-302020-05-3020020094-8276https://hdl.handle.net/2445/163191Contemporary crustal deformation of the southern Andean margin shows an interesting feature: While nearly all coastal GPS sites move landward, consistent with interseismic deformation near a locked subduction fault, sites 300-400 km landward of the rupture region of the M-w 9.5 1960 Chile earthquake are moving in the opposite direction. We attribute the seaward motion of these inland sites to a prolonged crustal deformation due to mantle stress relaxation following the 1960 great earthquake. In order to reproduce the observed seaward motion using a three-dimensional finite element model we need to incorporate a mantle viscosity of about 3 x 10(19) Pa s. The possibility that the seaward motion is caused by a silent slip event on the plate interface at large depths cannot be completely excluded, and our analysis provides a working model for future field tests.4 p.application/pdfeng(c) American Geophysical Union (AGU), 2002SubduccióTerratrèmolsXileSubductionEarthquakesChileinfo:eu-repo/semantics/article5252662020-05-30info:eu-repo/semantics/openAccess