Time-varying spectra through optical diffraction scanning
- 1 April 1964
- journal article
- Published by Seismological Society of America (SSA) in Bulletin of the Seismological Society of America
- Vol. 54 (2) , 485-500
- https://doi.org/10.1785/bssa0540020485
Abstract
An optical scanning method has been developed to present frequency content as it occurs and changes throughout a variable-density seismogram. Energy distributions are shown in both frequency and time. A two-dimensional pattern is presented which can be visually evaluated, and is suitable for numerical measurement. Seismic wave dispersions can be revealed and measured through a similar scanning method.Keywords
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