Spectral analysis of P-waves at short range as an indicator of focal parameters
Article first published online: 3 JUN 2011
©1969. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 50, Issue 5, pages 403–404, May 1969
How to Cite
1969), Spectral analysis of P-waves at short range as an indicator of focal parameters, Eos Trans. AGU, 50(5), 403–404, doi:10.1029/EO050i005p00403.(
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
- Cited By
The approach to understanding the physics of an earthquake is still largely empirical. Representations of the focal mechanism by a system of forces acting at a point, by a moving point source, and by distributions of elastic dislocations have contributed to an interpretation of the distribution in space and time of the displacements produced by an earthquake. When combined with laboratory evidence of the failure of materials, these representations, or perhaps others not yet conceived, may lead to a coherent theory of the earthquake source.
The applicability of analysis of the properties of seismic body waves in either the time or frequency domains in elucidating the characteristic of the source has been demonstrated by a number of investigators. In these investigations, the displacement or strain field at large distances has been the primary object of inquiry. Recently, some opportunities to observe in detail the behavior close-in to the source have arisen, for example, in the Parkfield earthquake, and important new insights have been gained.