Accéder directement au contenu Accéder directement à la navigation
Communication dans un congrès

Multi-scale dynamic rupture modelling for the 2011 Tohoku earthquake: from foreshocks to mainshock

Abstract : We present conceptual dynamic rupture models for the 2011 Tohoku earthquake based on the multi-scale heterogeneity in fracture energy. Regardless of frequently occurring M7.5 events in this area, it is crucial that a large scale fault heterogeneity corresponding to a M9 event had not been clearly recognized until this earthquake.We show that the largest heterogeneity having high fracture energy is consistent with relatively slow rupture propagation of the Tokoku earthquake. The large gap in fracture energy explains the separation of two groups of waves clearly visible in observed ground motions. Our simulations prefer a cascading rupture that begins from a medium heterogeneity and then progresses over larger scale heterogeneity. We also find that the existence of foreshocks helps the rupture to grow up during the mainshock.
Liste complète des métadonnées

https://hal-brgm.archives-ouvertes.fr/hal-00589528
Contributeur : Hideo Aochi <>
Soumis le : vendredi 29 avril 2011 - 10:36:33
Dernière modification le : lundi 20 août 2018 - 20:40:02
Archivage à long terme le : : samedi 30 juillet 2011 - 02:40:07

Fichier

Aochietal2011c.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-00589528, version 1

Collections

Citation

Hideo Aochi, Satoshi Ide. Multi-scale dynamic rupture modelling for the 2011 Tohoku earthquake: from foreshocks to mainshock. Japan Geoscience Union Meeting 2011, May 2011, Makuhari, Chiba, Japan. ⟨hal-00589528⟩

Partager

Métriques

Consultations de la notice

197

Téléchargements de fichiers

191