Rémy Dominique auteur aut IRD Perfettini Hugo auteur aut IRD Cotte N. auteur aut IRD Avouac J. P. auteur aut IRD Chlieh Mohamed auteur aut IRD Bondoux Francis auteur aut IRD Sladen A. auteur aut IRD Tavera H. auteur aut IRD Socquet A. auteur aut IRD text journalArticle eng text/pdf born digital access Characterizing the time evolution of slip over different phases of the seismic cycle is crucial to a better understanding of the factors controlling the occurrence of large earthquakes. In this study, we take advantage of interferometric synthetic aperture radar data and 3.5 years of continuous Global Positioning System (GPS) measurements to determine interseismic, coseismic, and postseismic slip distributions in the region of the 2007, M-w 8.0 Pisco, earthquake, Peru, using the same fault geometry and inversion method. Our interseismic model, based on pre-2007 campaign GPS data, suggests that the 2007 Pisco seismic slip occurred in a region strongly coupled before the earthquake while afterslip occurred in low coupled regions. Large afterslip occurred in the peripheral area of coseismic rupture in agreement with the notion that afterslip is mainly induced by coseismic stress changes. The temporal evolution of the region of maximum afterslip, characterized by a relaxation time of about 2.3 years, is located in the region where the Nazca ridge is subducting, consistent with rate-strengthening friction promoting aseismic slip. We estimate a return period for the Pisco earthquake of about 230 years with an estimated aseismic slip that might account for about 50% of the slip budget in this region over the 0-50 km seismogenic depth range. A major result of this study is that the main asperity that ruptured during the 2007 Pisco earthquake relocked soon after this event. specialized PEROU 066 121 5 3978-3995 2016 2169-9313 https://www.documentation.ird.fr/hor/fdi:010067737 10.1002/2015jb012417 2169-9313 [F B010067737] https://www.documentation.ird.fr/hor/fdi:010067737 https://www.documentation.ird.fr/intranet/publi/2016/09/010067737.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-09-30 2017-08-23 fdi:010067737 fre