NOCQUET , Jean-Mathieu

Des tremblements de terre particulièrement ravageurs peuvent survenir en Équateur et au Pérou. Dans ces pays, la connaissance des zones où les séismes sont susceptibles de se produire est un élément important de politique publique en matière de prévention des risques sismiques.

Both laboratory experiments and dynamic simulations suggest that earthquakes can be preceded by a precursory phase of slow slip. Observing processes leading to an acceleration or spreading of slow slip along faults is therefore key to understand the dynamics potentially leading to seismic ruptures. Here, we use continuous GPS measurements of...

In a recent publication, we showed that a stack of all GPS time series recorded before Magnitude ≥ 7.0 earthquakes suggests that large earthquakes start with a precursory phase of accelerating slow slip (Bletery and Nocquet, 2023). While no peer-reviewed comment or publication has formally contradicted this result, informal discussion has...

Le projet Marmor (Marine Advanced geophysical Research equipment and Mayotte multidisciplinary Observatory for research and Response), soumis à l'appel d'offre PIA3-ESR-Equipex+2 se propose de construire les éléments d'une infrastructure communautaire pour étudier les aléas telluriques, imager les structures de la Terre et répondre aux défis...

Rénag est le réseau national GPS permanent des laboratoires français à vocation scientifique. Il est une composante de Résif, ainsi que du Service d'Observation de l'Insu "Géodésie-Gravimétrie". Les stations du réseau Rénag enregistrent en continu les signaux provenant des satellites GPS, permettant non seulement de quantifier les déformations...

The existence of an observable precursory phase of slip on the fault before large earthquakes has been debated for decades. Although observations preceding several large earthquakes have been proposed as possible indicators of precursory slip, these observations do not directly precede earthquakes, are not seen before most events, and are also...

SUMMARY We combine Global Positioning System (GPS) velocity field with Interferometric Synthetic Aperture Radar (InSAR) results to study the interseismic deformation across the western Altyn Tagh fault (ATF) at longitude 86° E. GPS and InSAR data are consistent after correcting for the contribution from vertical deformation in the InSAR...