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- W78800208 abstract "Current deformation in western Europe and the western Mediterranean is usually assumed to be a consequence of the convergence between the African and Eurasia plates. However, the diversity of strain patterns observed within the plate boundary zone, the existence of rigid microplates and of active intraplate structures significantly complicate this apparently simple kinematic pattern. The accuracy of space geodetic techniques has reached a level where horizontal velocities of the order of a few millimeters per year within hundreds to thousands kilometers can now be detected. In order to achieve such an accuracy, combination methods were used and adapted, enabling to derive simultaneously a unique consistent solution from 3 permanent GPS networks (European (EUREF), national (RGP) and REGAL (western Alps) GPS permanent networks). The resulting velocity field describes horizontal crustal motion at 64 sites in western Europe with an accuracy better than 1 mm/yr. A statistical analysis shows that Central Europe behaves rigidly at a 0. 4 mm/yr level and can therefore be used to define a stable Europe reference frame. In that reference frame, no significant motion is found at sites located west of the Rhine Graben on the Iberian peninsula, on the Corsica-Sardinia block. Residual velocities for sites that possibly belong to the African plate suggest that the Africa/Eurasia plate motion may actually be significantly different from the NUVEL1A prediction. The geodetic data confirm the counter-clockwise rotation of the Adriatic microplate that appears to control the strain pattern along its boundaries in the Friuli area, the Alps, and the Apennines and the Dinarides. In the western Alps, the current strain pattern combines E-W extension and right-lateral shear. Numerical simulations indicate that in the context of low shortening, body forces contribution due to western Alps topography are strong enough to generate extension in the inner part of the range." @default.
- W78800208 created "2016-06-24" @default.
- W78800208 creator A5007228001 @default.
- W78800208 date "2002-01-01" @default.
- W78800208 modified "2023-09-23" @default.
- W78800208 title "Mesure de la déformation crustale en Europe occidentale par géodésie spatiale" @default.
- W78800208 hasPublicationYear "2002" @default.
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