SPICE HOMEPAGE
SPICE logo

Understanding seismic radiation patterns (tutorial)

The Matlab routine anaseis.m shows the 3D radiation pattern and the corresponding seismograms for various source types.

Authors: Gunnar Jahnke
General: Wave propagation
Code level: Training
Language: Matlab
Associated groups: Local Scale
Supercomputing: Serial
Grid dimensions: 1D
Coordinate system: Cartesian, Spherical
Method: Asymptotic
Tested operating system: Linux, Windows
Rheology: Elastic isotropic
Solution type: Analytical (symbolic)
Total hits: 7992

Latest Releases


Project Description

Radiation patterns of seismic sources are complex 3D structures. It is difficult to derive their properties solely from textbook formulas and 2D diagrams.

The Matlab routine anaseis.m shows the 3D radiation pattern and the corresponding seismograms for various source types.

By interactively rotating the radiation pattern in the 3D window (top right window) features such as nodal plane orientations and directions of maximum amplitudes can be understood.

The radiation patterns with plotted receiver locations in the 3D window together with the seismogram window (bottom right window) link the intuitive radiation patterns with the rather abstract seismogram representations of wave fields.