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TitreBayesian inversion of microtremor array dispersion data for vs structure on the Fraser River Delta, British Columbia
AuteurMolnar, S; Dosso, S E; Cassidy, J F
SourceProceedings of the 9th U.S. National and 10th Canadian Conference on Earthquake Engineering/Compte Rendu de la 9ième Conférence Nationale Américaine et 10ième Conférence Canadienne de Génie Parasismique; 762, 2010, 8 pages
Année2010
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090269
Réunion9th US Conference on Earthquake Engineering / 10th Canadian Conference on Earthquake Engineering; Toronto, On; CA; juillet 25-29, 2010
Documentlivre
Lang.anglais
Mediapapier
Référence reliéeCette publication est contenue dans Adams, J; Halchuk, S; Awatta, A; Adams, J; Halchuk, S; Awatta, A; (2010). Estimated seismic design values for Canadian missions abroad, Proceedings of the 9th U.S. National and 10th Canadian Conference on Earthquake Engineering
ProvinceColombie-Britannique
SNRC92G/03
Lat/Long OENS-123.5000 -123.0000 49.2500 49.0000
Sujetssismo-sondages; vitesse des ondes sismiques; levés sismiques; interpretations sismiques; géophysique
Illustrationsgraphs; plots
ProgrammeTargeted Hazard Assessments in Western Canada, Géoscience pour la sécurité publique
Résumé(disponible en anglais seulement)
This paper develops a Bayesian inversion approach to estimate the subsurface shear-wave velocity profile from microtremor array dispersion data, which is applied to a site on the Fraser River delta, British Columbia. Microtremors were recorded using an array of five seismographs set in an expanding series of apertures between 5-10 m and 160-180 m that provided phase velocity values over the frequency band of 1.2 to 6.7 Hz. The shear-wave velocity model parameterization is assessed using the Bayesian information criterion, which indicates a power law depth relation. Excellent agreement is obtained between the inversion result (optimal VS profile with 95% credibility interval) and the average VS profile determined from invasive methods (down-hole and seismic cone penetration testing) to over 100 m depth.
GEOSCAN ID248149