HR: 0800h
AN: S51E-1054    [Abstracts]
TI: Investigating the effects of imposing certain constraints in 3D Earth Velocity Models based on global available data, in the form of interfaces, such as topography/bathymetry, sediment and crustal thickness on travel times
AU: * Aprea, C M
EM: cmaprea@la.unm.edu
AF: University of New Mexico - Los Almos, 4000 University Drive, Los Alamos, NM 87544 United States
AB: The development and use of 3-D Earth models is becoming more widespread in geophysics. In particular, in seismology, 3-D models can be developed based on many different types of data, some of them constructed from the knowledge of bathymetry/ topography data, sediment and crust thickness, and with local or regional 1-, 2-, and 3-D profiles. The natural 'geometrical setting' for describing such models is by defining a suitable numbers of layers within prominent sections of the lithosphere, and using interpolation between data points to create a smooth, self-consistent 3-D Earth model using longitude, latitude and depth from surface, but still maintaining the interfaces for the 'prominent sections of the lithosphere'. In these type of models, that may be used as a-priori models for other data-based models, it is worth to investigate the effects of imposing such sections or interfaces compare to the effects of, say, changing local velocity profiles. In other words, what kind of restrictions of such interfaces in the model may affect the outcome of for example, travel times computed by different methods such as ray bending and shooting methods.
DE: 7200 SEISMOLOGY
DE: 7203 Body waves
DE: 7218 Lithosphere (1236)
DE: 7290 Computational seismology
SC: Seismology [S]
MN: Fall Meeting 2005