Simulating high-frequency seismograms in complicated media: A spectral approach
- Univ. of Colorado, Boulder, CO (United States)
The main attraction of using a spectral method instead of a conventional finite difference or finite element technique for full-wavefield forward modeling in elastic media is the increased accuracy of a spectral approximation. While a finite difference method accurate to second order typically requires 8 to 10 computational grid points to resolve the smallest wavelengths on a 1-D grid, a spectral method that approximates the wavefield by trignometric functions theoretically requires only 2 grid points per minimum wavelength and produces no numerical dispersion from the spatial discretization. The resultant savings in computer memory, which is very significant in 2 and 3 dimensions, allows for larger scale and/or higher frequency simulations.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- OSTI ID:
- 91018
- Report Number(s):
- LA-UR--93-3839; CONF-930397--; ON: DE95003509
- Country of Publication:
- United States
- Language:
- English
Similar Records
Accurate and efficient seismic modeling in random media
An optimal 9-point, finite-difference, frequency-space, 2-D scalar wave extrapolator