Surface wave dispersion across Tibet: Direct evidence for radial anisotropy in the crust - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2010

Surface wave dispersion across Tibet: Direct evidence for radial anisotropy in the crust

Résumé

[1] Recordings in western Tibet of Rayleigh and Love waves at periods less than 70 s from aftershocks of the 2008 Sichuan earthquake cannot be matched by an isotropic velocity model beneath Tibet. These intermediate‐period Rayleigh and Love waves require marked radial anisotropy in the middle crust of Tibet, with the vertically polarized S‐ waves propagating more slowly than S‐waves with horizontal polarization. The magnitude of anisotropy inferred using paths entirely within Tibet is slightly greater than that obtained previously from a tomographic inversion of a dataset covering a larger region. Anisotropy in the middle crust likely reflects deformation of the middle crust, and is consistent with the notion of mid‐crustal flow and thinning of the crust.
Fichier principal
Vignette du fichier
grl3811.pdf (1.09 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-01285792 , version 1 (10-03-2016)

Identifiants

Citer

F Duret, Nikolai M. Shapiro, Z Cao, V Levin, P Molnar, et al.. Surface wave dispersion across Tibet: Direct evidence for radial anisotropy in the crust. Geophysical Research Letters, 2010, 37 (16), ⟨10.1029/2010GL043811⟩. ⟨insu-01285792⟩
93 Consultations
264 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More