HR: 1340h
AN: S53A-1042    [Abstracts]
TI: Detailed Modeling of the 2004 Tsunami Flooding in the Banda Aceh and Lhok Nga Districts (Sumatra, Indonesia)
AU: * Loevenbruck, A
EM: anne.loevenbruck@cea.fr
AF: CEA-DASE, BP12, Bruyeres-le-Chatel, 91680, France
AU: Hebert, H
EM: helene.hebert@cea.fr
AF: CEA-DASE, BP12, Bruyeres-le-Chatel, 91680, France
AU: Schindele, F
EM: francois.schindele@cea.fr
AF: CEA-DASE, BP12, Bruyeres-le-Chatel, 91680, France
AU: Sladen, A
EM: anthony.sladen@gmail.com
AF: Division of Geological and Planetary Sciences, Caltech, 1200 E. California Blvd, Pasadena, CA 91125, United States
AU: Lavigne, F
EM: Lavigne@univ-Paris1.fr
AF: Laboratoire de Geographie Physique, Universite Paris I, 1 place Aristide Briand, Meudon, 92190, France
AU: Brunstein, D
EM: brunstein@cnrs-bellevue.fr
AF: Laboratoire de Geographie Physique, Universite Paris I, 1 place Aristide Briand, Meudon, 92190, France
AU: Wassmer, P
EM: Wassmerpat@aol.com
AF: Laboratoire de Geographie Physique, Universite Paris I, 1 place Aristide Briand, Meudon, 92190, France
AU: Paris, R
EM: raparis@univ-bpclermont.fr
AF: Geolab, Universite Blaise Pascal, 4 rue Ledru, Clermont-Ferrand, 63057, France
AB: Within the French-Indonesian TSUNARISQUE programme (http://www.tsunarisque.cnrs.fr) a great amount of observational data has been gathered in order to quantify the impact of the 2004 tsunami on the northern region of Sumatra, near Banda Aceh and Lhok Nga. Tsunami studies and numerical modeling in particular have rarely been confronted to such a database. Now this consortium also provides a detailed bathymetric and topographic mapping of the area, which allows us to refine our previous hydrodynamic modeling of the tsunami flooding. Our models succeed in reproducing the overall trend of the measured wave heights. We focus on the timing of the wave arrivals on the various locations where temporal observations are available, such as the clocks broken when struck by the tsunami, or as the collision of the wave merging across Banda Aceh and the incoming wave at Lhok Nga. We discuss the delayed arrival time at Lhok Nga and the early estimation at Banda Aceh obtained by the previous models. Since slip heterogeneities and rupture kinematics can infer various tsunami impacts on the area, we test several source mechanisms by letting vary the coseismic slip and fault geometry along the thrust.
DE: 4534 Hydrodynamic modeling
DE: 4564 Tsunamis and storm surges
DE: 7240 Subduction zones (1207, 1219, 1240)
DE: 9340 Indian Ocean
SC: Seismology [S]
MN: 2007 Fall Meeting