Calculation of 3-dimensional synthetic seismograms on the connection machine
Citable URI
https://hdl.handle.net/1912/6446DOI
10.1575/1912/6446Keyword
Seismograms; Acoustic modelsAbstract
A three dimensional, second order finite difference method was used to create synthetic
seismograms for elastic wave propagation in heterogeneous media. These synthetic seismograms are
used to model rough seafloor, the shallow crust, or complex structural and stratigraphic settings with
strong lateral heterogeneities. The finite difference method is preferred because it allows models of
any complexity to be generated and includes all multiple scattering, wave conversion and diffraction
effects. The method uses a fully staggered grid as developed by Virieux (1986). Wavefront snapshots
and time series output allow the scattering and focussing of different wave modes with direction to
be visualized.
The extensive calculations required for realistic size models stretches the resources of serial
computers like the VAX 8800. On the Connection Machine, a massively parallel computer, the
finite difference grid can be directly mapped onto the virtual processors, reducing the nested time
and space loops in the serial code to a single time loop. As a result, the computation time is reduced
dramatically.
Suggested Citation
Allen, J. M., & Burns, D. R. (1989). Calculation of 3-dimensional synthetic seismograms on the connection machine. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/6446Related items
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FINDIF : a software package to create synthetic seismograms by finite differences
Hunt, Mary M.; Gove, Lee; Stephen, Ralph A. (Woods Hole Oceanographic Institution, 1983-11)In order to study seismic wave propagation through laterally varying sea floor structures, a software package has been created to generate synthetic seismograms by finite differences. The elastic wave equation can ... -
A user’s manual for finite difference synthetic seismogram codes on the CYBER 205 and CRAY XMP-12
Hunt, Mary M.; Stephen, Ralph A. (Woods Hole Oceanographic Institution, 1986-11)Over the past eight years, a software package has been developed to solve the elastic wave equation by the method of finite differences (Hunt et al., 1983; Stephen, 1983; Stephen, 1984a; Stephen, 1984b; Nicoletis, 1981). ... -
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Allen, Julie M.; Stephen, Ralph A. (Woods Hole Oceanographic Institution, 1991-09)During the past six months, the two-dimensional finite difference synthetic seismogram code was installed and run on a number of different computer systems. The results were compared for timing, accuracy and the ease with ...