HR: 1400h
AN: T43B-07    [Abstracts]
TI: Using Tsunami Deposits and Observed Tsunami Heights to Test Source Models of 1960 Chile Earthquake
AU: * Lagos, M
EM: mlagoslo@uc.cl
AF: Instituto de Geografia, Universidad Catolica de Chile, Av. Vicuna Mackenna 4860, Santiago, RM 7820436, Chile
AU: Cisternas, M
EM: marco.cisternas@ucv.cl
AF: Facultad de Agronomia, Universidad Catolica de Valparaiso, San Francisco sn, La Palma, Quillota, V Cas 4-D, Chile
AB: Near-field tsunami simulations of the giant 1960 Chile earthquake (Mw 9.5) were performed with several source models. The computed inundation areas are compared with tsunami deposits localization and observed tsunami heights. Tsunami simulations were focused on the Pacific coasts of the south-central Chile, examining the Rio Maullin estuary in detail, localized at 41.5° S midway along the 1960 rupture; in this place the 1960 earthquake lowered the area by 1.5 m, and the ensuing tsunami spread sand across lowland soils. The tsunami heights at the coast were greater than 9 m above sea level, and in much of this flooded area, the tsunami reached a height of 4.5 m. Fault parameters of source models examined in this study consider six sources from Kanamori and Cipar (1974) with the same length, width, slip, strike and dip but different rake and depth; six sources proposed by Cifuentes (1989) with the same length, strike and rake but different width, slip, dip and depth; and one source from Barrientos and Ward (1990). The results allow propose the earthquake source models for tsunami generation that better fit with real evidences. Research supported by Fondecyt 1060227 and 1060745.
DE: 0545 Modeling (4255)
DE: 4255 Numerical modeling (0545, 0560)
DE: 4564 Tsunamis and storm surges
DE: 7240 Subduction zones (1207, 1219, 1240)
SC: Tectonophysics [T]
MN: 2007 Joint Assembly