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| HAL : hal-00530999, version 5 |
| arXiv : 1011.1741 |
| Fiche détaillée |  Récupérer au format |
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| Versions disponibles : | v1 (08-11-2010) | v2 (03-05-2011) | v3 (13-02-2012) | v4 (05-06-2012) | v5 (12-07-2012) |
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| On the contribution of the horizontal sea-bed displacements into the tsunami generation process |
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Denys Dutykh 1Dimitrios Mitsotakis 2 |
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| (02/11/2010) |
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| The main reason for the generation of tsunamis is the deformation of the bottom of the ocean caused by an underwater earthquake. Usually, only the vertical bottom motion is taken into account while the horizontal co-seismic displacements are neglected in the absence of landslides. In the present study we propose a methodology based on the well-known Okada solution to reconstruct in more details all components of the bottom coseismic displacements. Then, the sea-bed motion is coupled with a three-dimensional weakly nonlinear water wave solver which allows us to simulate a tsunami wave generation. We pay special attention to the evolution of kinetic and potential energies of the resulting wave while the contribution of the horizontal displacements into wave energy balance is also quantified. Such contribution of horizontal displacements to the tsunami generation has not been discussed before, and it is different from the existing approaches. The methods proposed in this study are illustrated on the July 17, 2006 Java tsunami and some more recent events. |
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| 1 : | Laboratoire de Mathématiques (LAMA) |
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CNRS : UMR5127 – Université de Savoie |
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| 2 : | Institute for Mathematics and its Applications (IMA) |
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University of Minnesota |
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| 3 : | Institute of Computational Technologies |
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Russian Academy of Science |
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| Domaine | : | Physique/Mécanique/Mécanique des fluides Sciences de l'ingénieur/Mécanique/Mécanique des fluides Planète et Univers/Océan, Atmosphère Physique/Physique/Dynamique des Fluides Physique/Physique/Physique Atmosphérique et Océanique Physique/Physique/Physique Numérique Planète et Univers/Sciences de la Terre/Océanographie Planète et Univers/Sciences de la Terre/Géophysique Physique/Physique/Géophysique Sciences de l'environnement/Milieux et Changements globaux |
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| tsunami waves – water waves – coseismic displacements – wave energy – finite fault inversion |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00530999, version 5 | |
| http://hal.archives-ouvertes.fr/hal-00530999 | |
| oai:hal.archives-ouvertes.fr:hal-00530999 | |
| Contributeur : Denys Dutykh | |
| Soumis le : Mercredi 11 Juillet 2012, 22:40:07 | |
| Dernière modification le : Jeudi 12 Juillet 2012, 08:17:22 | |
