Numerical-analytical interfacing in two dimensions with applications to modeling NTS seismograms
A new method for interfacing numerical and integral techniques allows greater flexibility in seismic modeling. Specifically, numerical calculations in laterally varying structure are interfaced with analytic methods that enable propagation to great distances. Such modeling is important for studying situations containing localized complex regions not easily handled by analytic means. The calculations involved are entirely two-dimensional, but the use of an appropriate source in combination with a filter applied to the resulting seismograms produces synthetic seismograms which are point-source responses in three dimensions. The integral technique is called two-dimensional Kirchhoff because its form is similar to the classical three-dimensional Kirchhoff. Data from Yucca Flat at the Nevada Test Site are modeled as a demonstration of the usefulness of the new method. In this application, both local and teleseismic records are modeled simultaneously from the same model with the same finite-difference run. This application indicates the importance of locally scattered Rayleigh waves in the production of teleseismic body-wave complexity and coda.
- Research Organization:
- California Inst. of Tech., Pasadena (USA). Seismological Lab.
- OSTI ID:
- 6176711
- Report Number(s):
- AD-A-203567/3/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989)
EXPLOSIONS
INTERFACES
MATHEMATICAL MODELS
MATHEMATICS
NATIONAL ORGANIZATIONS
NEVADA TEST SITE
NUCLEAR EXPLOSIONS
NUMERICAL ANALYSIS
PRODUCTION
RAYLEIGH WAVES
SCATTERING
SEISMIC SURFACE WAVES
SEISMIC WAVES
SEISMOLOGY
SYNTHESIS
TEST FACILITIES
UNDERGROUND EXPLOSIONS
US DOE
US ORGANIZATIONS