A progress report on seismic model studies
Crustal Studies Technical Letter
15
In cooperation with the Defense Advanced Research Projects Agency
By: J. H. Healy and G. B. Mangan
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Abstract
The value of seismic-model studies as an aid to understanding wave propagation in the Earth's crust was recognized by early investigators (Tatel and Tuve, 1955). Preliminary model results were very promising, but progress in model seismology has been restricted by two problems: (1) difficulties in the development of models with continuously variable velocity-depth functions, and (2) difficulties in the construction of models of adequate size to provide a meaningful wave-length to layer-thickness ratio. The problem of a continuously variable velocity-depth function has been partly solved by a technique using two-dimensional plate models constructed by laminating plastic to aluminum, so that the ratio of plastic to aluminum controls the velocity-depth function (Healy and Press, 1960). These techniques provide a continuously variable velocity-depth function, but it is not possible to construct such models large enough to study short-period wave propagation in the crust. This report describes improvements in our ability to machine large models. Two types of models are being used: one is a cylindrical aluminum tube machined on a lathe, and the other is a large plate machined on a precision planer. Both of these modeling techniques give promising results and are a significant improvement over earlier efforts.
Suggested Citation
Healy, J.H., Mangan, G.B., 1963, A progress report on seismic model studies: Crustal Studies Technical Letter 15, iv, 8 p., https://doi.org/10.3133/70039538.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Unnumbered Series |
| Title | A progress report on seismic model studies |
| Series title | Crustal Studies Technical Letter |
| Series number | 15 |
| DOI | 10.3133/70039538 |
| Year Published | 1963 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Denver, CO |
| Contributing office(s) | Earthquake Science Center |
| Description | iv, 8 p. |
| Online Only (Y/N) | Y |