Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

The importance of crustal structure in explaining the observed uncertainties in ground motion estimation

Abstract : In this short article, the possible reduction in the standard deviation of empirical ground motion estimation equations through the modelling of the effect of crustal structure is assessed through the use of ground-motion simulations. Simulations are computed for different source-to-site distances, focal depths, focal mechanisms and for crustal models of the Pyrenees, the western Alps and the upper Rhine Graben. Through the method of equivalent hypocentral distance introduced by Douglas et al. [(2004) Bull Earthquake Eng 2(1): 75–99] to model the effect of crustal structure in empirical equations, the scatter associated with such equations derived using these simulated data could be reduced to zero if real-to-equivalent hypocentral distance mapping functions were derived for every combination of mechanism, depth and crustal structure present in the simulated dataset. This is, obviously, impractical. The relative importance of each parameter in affecting the decay of ground motions is assessed here. It is found that variation in focal depth is generally more important than the effect of crustal structure when deriving the real-to-equivalent hypocentral distance mapping functions. In addition, mechanism and magnitude do not have an important impact on the decay rate.
Liste complète des métadonnées

Littérature citée [3 références]  Voir  Masquer  Télécharger

https://hal-brgm.archives-ouvertes.fr/hal-00557603
Contributeur : John Douglas <>
Soumis le : mercredi 19 janvier 2011 - 14:15:04
Dernière modification le : jeudi 30 janvier 2020 - 09:08:01
Archivage à long terme le : : mercredi 20 avril 2011 - 02:52:19

Fichier

crustalshortrevised.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

John Douglas, Hideo Aochi, Peter Suhadolc, Giovanni Costa. The importance of crustal structure in explaining the observed uncertainties in ground motion estimation. Bulletin of Earthquake Engineering, Springer Verlag, 2007, 5 (1), pp.17-26. ⟨10.1007/s10518-006-9017-y⟩. ⟨hal-00557603⟩

Partager

Métriques

Consultations de la notice

263

Téléchargements de fichiers

290