Perfettini Hugo auteur aut IRD Avouac J. P. auteur aut IRD text journalArticle eng text/pdf born digital access One way to probe the rheology of the lithosphere and fault zones is to analyze the temporal evolution of deformation following a large earthquake. In such a case, the lithosphere responds to a known stress change that can be assessed from earthquake slip models constrained from seismology and geodesy. Here, we model the postseismic response of a fault zone that is assumed to obey a rate-strengthening rheology, where the frictional stress varies as a sigma ln((epsilon) over dot), (epsilon) over dot being the deformation rate and a sigma > 0 a rheological parameter. The model is simple enough that these parameters can be estimated by inversion of postseismic geodetic data. We apply this approach to the analysis of geodetic displacements following the M(w)7.3, 1992, Landers earthquake. The model adjusts well the measured displacements and implies a sigma approximate to 0.47-0.53 MPa. In addition, we show that aftershocks and afterslip follow the same temporal evolution and that the spatiotemporal distribution of aftershocks is consistent with the idea that they are driven by reloading of the seismogenic zone resulting from frictional afterslip. specialized 066 112 B7 NIL_1-NIL_19 2007 0148-0227 https://www.documentation.ird.fr/hor/fdi:010093153 10.1029/2006JB004399 0148-0227 [F B010093153] https://www.documentation.ird.fr/hor/fdi:010093153 https://www.documentation.ird.fr/intranet/publi/2025-02/010093153.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2007-10-11 2025-02-28 fdi:010093153 fre