A Mw 6.3 earthquake scenario in the city of Nice (southeast France): ground motion simulations - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Seismology Année : 2009

A Mw 6.3 earthquake scenario in the city of Nice (southeast France): ground motion simulations

Jérome Salichon
  • Fonction : Auteur correspondant
  • PersonId : 883312

Connectez-vous pour contacter l'auteur
Carine Kohrs-Sansorny
  • Fonction : Auteur
Françoise Courboulex
Connectez-vous pour contacter l'auteur

Résumé

The southern Alps–Ligurian basin junction is one of the most seismically active zone of the western Europe. A constant microseismicity and moderate size events (3.5 < M < 5) are regularly recorded. The last reported historical event took place in February 1887 and reached an estimated magnitude between 6 and 6.5, causing human losses and extensive damages (intensity X, Medvedev–Sponheuer–Karnik). Such an event, occurring nowadays, could have critical consequences given the high density of population living on the French and Italian Riviera. We study the case of an offshore Mw 6.3 earthquake located at the place where two moderate size events (Mw 4.5) occurred recently and where a morphotectonic feature has been detected by a bathymetric survey. We used a stochastic empirical Green's functions (EGFs) summation method to produce a population of realistic accelerograms on rock and soil sites in the city of Nice. The ground motion simulations are calibrated on a rock site with a set of ground motion prediction equations (GMPEs) in order to estimate a reasonable stress-drop ratio between the February 25th, 2001, Mw 4.5, event taken as an EGF and the target earthquake. Our results show that the combination of the GMPEs and EGF techniques is an interesting tool for site-specific strong ground motion estimation.
Fichier principal
Vignette du fichier
PEER_stage2_10.1007%2Fs10950-009-9180-0.pdf (7.27 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00540029 , version 1 (26-11-2010)

Identifiants

Citer

Jérome Salichon, Carine Kohrs-Sansorny, Etienne Bertrand, Françoise Courboulex. A Mw 6.3 earthquake scenario in the city of Nice (southeast France): ground motion simulations. Journal of Seismology, 2009, 14 (3), pp.523-541. ⟨10.1007/s10950-009-9180-0⟩. ⟨hal-00540029⟩
278 Consultations
287 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More