Accession Number : ADA323186

Title :   Wavenumber Integration Synthetic Seismogram Calculations Using a Parallel Virtual Machine.

Descriptive Note : Scientific rept. no. 1,

Corporate Author : MAXWELL TECHNOLOGIES INC SAN DIEGO CA FEDERAL DIV

Personal Author(s) : McLaughlin, Keith L. ; Shkoller, Boris

PDF Url : ADA323186

Report Date : JUL 1996

Pagination or Media Count : 28

Abstract : The principal objectives of this work are to: (1) provide more accurate, and efficient means to compute, store, and retrieve synthetic seismograms for reference layered Earth structures and (2) examine limitations of using layered Earth structures to model principal features of regional seismograms in the presence of lateral heterogeneity. This annual report describes work completed in the first year of this two year project and very briefly describes work to be carried out in the second year. In the first year of this project a wavenumber integration program has been ported from a single processor application to a parallel processing environment using the Parallel Virtual Machine (PVM) software environment. This software allows the user to harness a network of UNIX workstations to perform calculations in parallel. A beta test version of the program is available upon request. Near linear speedup over a single processor has been realized with a heterogeneous network tested over both wide and local area networks.

Descriptors :   *COMPUTER PROGRAMS, *PARALLEL PROCESSING, *SEISMIC DATA, *SEISMOGRAPHS, TEST AND EVALUATION, ENVIRONMENTS, LOCAL AREA NETWORKS, SYNTHESIS, LAYERS, PROCESSING EQUIPMENT, WIDE AREA NETWORKS, USER NEEDS, WORK STATIONS, HETEROGENEITY, EARTH(PLANET).

Subject Categories : Seismology
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE