Investigating subduction zone processes in Chile

Andean structural control on interseismic coupling in the North Chile subduction zone

1 Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ Paris Diderot, UMR 7154 CNRS, F-75005 Paris, France. 2 InSARlab Geohazards InSAR laboratory, Geoscience Research dept., Geological Survey of Spain, Alenza 1, 28003, Spain. 3 Université Joseph Fourier Grenoble I, OSUG Observatoire des Sciences de l’Univers de Grenoble, ISTerre Institut des Sciences de la Terre Maison des Géoscie...

Subduction zone rheology

Rheological flow laws can be obtained from studies using multi-anvil high-pressure systems with synchrotron-based piezometers and strain metrics. The high flux X-ray source provides minute-scale time resolution with accurate measurement of diffraction patterns and direct sample images. Measurements of length changes with an accuracy of one part in 104 are being developed and will provide a new ...

Distribution of slip from 11 Mw > 6 earthquakes in the northern Chile subduction zone

[1] We use interferometric synthetic aperture radar, GPS, and teleseismic data to constrain the relative location of coseismic slip from 11 earthquakes on the subduction interface in northern Chile (23 –25 S) between the years 1993 and 2000. We invert body wave waveforms and geodetic data both jointly and separately for the four largest earthquakes during this time period (1993 Mw 6.8; 1995 Mw ...

Interseismic coupling, segmentation and mechanical behavior of the Central Chile subduction zone

Upper lithospheric structure of the subduction zone offshore of southern Arauco peninsula, Chile, at 38 S

[1] A joint interpretation of swath bathymetric, seismic refraction, wide-angle reflection, and multichannel seismic data was used to derive a detailed tomographic image of the Nazca–South America subduction zone system offshore southern Arauco peninsula, Chile at 38 S. Here, the trench basin is filled with up to 2.2 km of sediments, and the Mocha Fracture Zone (FZ) is obliquely subducting unde...