Identifying global seismic anisotropy patterns by correlating shear-wave splitting and surface wave data - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physics of the Earth and Planetary Interiors Année : 2009

Identifying global seismic anisotropy patterns by correlating shear-wave splitting and surface wave data

Andreas Wüstefeld
  • Fonction : Auteur correspondant
  • PersonId : 864345

Connectez-vous pour contacter l'auteur
Götz Bokelmann
  • Fonction : Auteur
Guilhem Barruol
Jean-Paul Montagner
  • Fonction : Auteur

Résumé

We compare a global compilation of shear-wave splitting measurements with azimuthal seismic anisotropy parameters inferred from surface wave tomography. The currently available splitting dataset is taken from a novel comprehensive collection of available publications that is updated interactively online. The comparison between the two types of data is made by calculating predicted splitting parameters from the anisotropic tomography model. Comparing these predicted splitting parameters with the observed ones, we find a considerable correlation between the two datasets at global scale. This result is noteworthy, since such correlation did not seem to exist in previous studies. The spatial resolution associated with the two types of methods is rather different. While surface waves have good vertical resolution and poor lateral resolution of several hundreds of kilometers, SKS splitting measurements have good lateral, but poor vertical resolution. The correlation can be understood in light of recent propositions that anisotropy seen by SKS splitting constrains mostly the upper mantle, and therefore a similar depth region as surface waves. The correlation also confirms the generally good quality of the shear-wave measurements, as well as that of the anisotropic tomography model.
Fichier principal
Vignette du fichier
PEER_stage2_10.1016%2Fj.pepi.2009.05.006.pdf (2.67 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00573464 , version 1 (04-03-2011)

Identifiants

Citer

Andreas Wüstefeld, Götz Bokelmann, Guilhem Barruol, Jean-Paul Montagner. Identifying global seismic anisotropy patterns by correlating shear-wave splitting and surface wave data. Physics of the Earth and Planetary Interiors, 2009, 176 (3-4), pp.198. ⟨10.1016/j.pepi.2009.05.006⟩. ⟨hal-00573464⟩

Collections

PEER
203 Consultations
267 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More