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|Title:||Prolonged post-seismic deformation of the 1960 great Chile earthquake and implications for mantle rheology|
|Publisher:||American Geophysical Union (AGU)|
|Abstract:||Contemporary 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.|
|Note:||Reproducció del document publicat a:|
|It is part of:||Geophysical Research Letters, 2002, vol. 29, num. 22, p. 2050-2053|
|Appears in Collections:||Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)|
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