| Study of the Tsunami |
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Helene HEBERT : helene.hebert@cea.fr
(Laboratoire de Détection Géophysique, CEA, Paris, France) |
- The tsunami modeling was carried out with the following (preliminary) parameters: Seismic moment 1.3 10^21 Nm Fault dimensions: 240x100 km^2 Strike, dip, rake : 259°, 28°, 59° - The hydrodynamic equations are solved using a finite difference method, with a bathymetric grid describing the Pacific Ocean (grid cell ~ 9 km). The rectangle displayed on the animation and on the hmax figure shows the area of the Marquesas Islands where tsunami amplification are usually the most important in French Polynesia. - Further modeling is required in this region to explain the tide gauge records in Hiva Oa (~ 4 cm peak-to-through) and in Nuku Hiva (~12 cm) for the Hokkaido 2003 tsunami. Several recent references about the tsunamis in French Polynesia: - Guibourg, S., P. Heinrich and R. Roche, Numerical modeling of the 1995 Chilean tsunami. Impact on French Polynesia, Geophysical Research Letters, 24, 775-778, 1997. - Heinrich, P., F. Schindelé, S. Guibourg and P.F. Ihmlé, Modeling of the February 1996 Peruvian tsunami, Geophysical Research Letters, 25, 2687-2690, 1998. - Hébert, H., P. Heinrich, F. Schindelé, and A. Piatanesi, Far-field simulation of tsunami propagation in the Pacific Ocean: impact on the Marquesas Islands (French Polynesia), Journal of Geophysical Research, 106, C5, 9161-9278, 2001. |
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| GIF animation of the tsunami |
| MPEG animation of the tsunami |
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| Maximum water height after 13 hours
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