Accession Number : ADA136313

Title :   Large-Scale Numerical Analysis of Seismic Waves in Basins.

Descriptive Note : Interim rept. 1 Oct 81-30 Sep 82,


Personal Author(s) : Wojcik,G L ; Isenberg,J ; Vaughan,D K ; Wolf,R E

PDF Url : ADA136313

Report Date : 30 Sep 1982

Pagination or Media Count : 67

Abstract : This report describes the application of a large-scale numerical wave solver to the time domain study of seismic wave phenomena in basins typical of the Basin and Range province. The solver uses an explicit finite element algorithm designed for fully vectorized execution on the CRAY-1. Calculations were performed to study the effects of basin edge geometry on reflection and transmission of body and surface waves. Normal and tangential surface traction sources were applied on the model centerline. From the resulting full wave field solution, synthetic seismograms were generated and used to quantify principal phases. In addition, the body and surface wave interaction of two basins separated by a mountain was studied. This model required 120,000 elements and demonstrated that large-scale full wave field calculations are practical on the CRAY-1.

Descriptors :   *Seismic waves, *Basins(Geographic), Mountains, Wave propagation, Velocity, Mathematical models, Computerized simulation, Finite element analysis

Subject Categories : Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE