| Titre | Numerical simulations of tsunami waves and currents for southern Vancouver Island from a Cascadia megathrust earthquake |
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| Auteur | Cherniawsky, J Y; Titov, V V; Wang, K ; Li, J -Y |
| Source | Pure and Applied Geophysics vol. 164, no. 2-3, 2007 p. 465-492, https://doi.org/10.1007/s00024-006-0169-0 |
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| Année | 2007 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20060380 |
| Éditeur | Springer Nature |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1007/s00024-006-0169-0 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Colombie-Britannique |
| SNRC | 92B; 92C |
| Région | Southern Vancouver Island |
| Lat/Long OENS | -126.0000 -122.0000 49.0000 48.0000 |
| Sujets | zones de subduction; subduction; failles, chevauchement; secousses séismiques; marges plaques; frontières de plaques; sismicité; zones sismiques; géophysique; géologie structurale; tectonique |
| Illustrations | profils sismiques; cartes de localisation; tableaux; graphiques |
| Programme | Réduction des risques dus aux aléas naturels |
| Programme | Garde côtière canadienne, Fonds des
nouvelles initiatives |
| Programme | Pêches et Océans Canada, Programme de financement
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| Diffusé | 2007 03 01 |
| Résumé | (disponible en anglais seulement)
The 1700 great Cascadia earthquake (M = 9) generated widespread tsunami waves that affected the entire Pacific Ocean and caused damage as distant as Japan.
Similar catastrophic waves may be generated by a future Cascadia megathrust earthquake. We use three rupture scenarios for this earthquake in numerical experiments to study propagation of tsunami waves off the west coast of North America and to
predict tsunami heights and currents in several bays and harbours on southern Vancouver Island, British Columbia, including Ucluelet, located on the west coast of the island, and Victoria and Esquimalt harbours inside Juan de Fuca Strait. The
earthquake scenarios are: an 1100-km long rupture over the entire length of the subduction zone and separate ruptures of its northern or southern segments. As expected, the southern earthquake scenario has a limited effect over most of the Vancouver
Island coast, with waves in the harbours not exceeding 1 m. The other two scenarios produce large tsunami waves, higher than 16 m at one location near Ucluelet and over 4 m inside Esquimalt and Victoria harbours, and very strong currents that reach
17 m/s in narrow channels and near headlands. Because the assumed rupture scenarios are based on a previous earthquake, direct use of the model results to estimate the effect of a future earthquake requires appropriate qualification. |
| GEOSCAN ID | 222951 |
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