Open AccessComputation of synthetic seismogram in real earth model by eigen function expansion
Author(s) -
Ajit De,
Arindam Roy,
Mandar Mitra,
Rahul Bhattacharya
Publication year - 2016
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v67i3.1385
Subject(s) - computation , seismogram , geology , displacement field , source function , synthetic seismogram , mathematical analysis , mathematics , computer science , algorithm , geophysics , finite element method , physics , seismology , astrophysics , thermodynamics
The method of eigen function expansion has been used in the present study to compute synthetic or theoretical seismogram in layered elastic half-space of real earth model. Simple dislocation source model has been considered. The transverse (SH) or radial and vertical (P-SV) components of displacement field have been computed as summed modes and compared by using both exact and numerical techniques. The methods used in the study, include exact evaluation by propagator matrix approach using Reflection-Transmission coefficients as well as numerical computations using Runge-Kutta method of order 4. The specialty of the present study is to evaluate approximate displacement field for the earth models with homogeneous and / or inhomogeneous layers. The normalization technique has been used in the study to control the overflow errors. The study has an advantage to get an idea of earth structure or source model by an inverse iterative technique.