Remarks on the travelling wave decomposition
Geophysical Journal International
By: F. F. Pollitz
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Abstract
In elastic wave propagation on a spherically symmetric earth model, a normal mode sum is converted into a sum of equivalent travelling waves by means of a travelling wave decomposition (TWD). For two decades, seismologists have assumed that each travelling wave in the TWD is associated with only real phase velocities, that is, no evanescent waves travel on a spherically symmetric earth model. In this paper, this assumption is proven false. By including a countably infinite set of waves travelling as evanescent waves, several conceptual difficulties confronting the TWD are resolved.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Remarks on the travelling wave decomposition |
| Series title | Geophysical Journal International |
| DOI | 10.1046/j.1365-246X.2001.00271.x |
| Volume | 144 |
| Issue | 2 |
| Year Published | 2001 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geophysical Journal International |
| First page | 233 |
| Last page | 246 |
| Google Analytic Metrics | Metrics page |