Some applications of seismogram synthesis through the summation of modes of Rayleigh waves

Main Article Content

P. Suhadolc
G.F. Panza


Complete synthetic seismograms can be computed by the superposition of the fundamental and higher modes of Rayleigh waves. The usefulness of this approach is illustrated by the fact that it is possible to reproduce with sufficient detail experimental signals lasting several tens of seconds and having a high-frequency content (up to 1 Hz). The method has been proven to work even for higher frequencies, up to 10 Hz. To illustrate the source and structure modelling using this method, the whole experimental records from the Carder displacement meter at the station El Centro for the 1968 Borrego Mountain earthquake have been fitted. Seismic profiles (displacement, velocity and acceleration) have been synthesized and they clearly show the expected agreement between ray travel times and arrival times of different phases.

Google Scholar           ARK:



Article Details

How to Cite
Suhadolc, P., and G.F. Panza. 1985. “Some Applications of Seismogram Synthesis through the Summation of Modes of Rayleigh Waves”. Journal of Geophysics 58 (1), 183-88.
Bookmark and Share


Allen, C.R., Nordquist, J.M. (1972) Foreshock, main shock and larger aftershocks of the Borrego Mountain earthquake. U.S. Geol. Surv. Profess. Paper 787:16-23

Biswas, N.N., Knopoff, L. (1974) The structure of the upper mantle under the United States from the dispersion of Rayleigh waves. Geophys. J. R. Astron. Soc. 36:515-539

Burdick, L.J., Mellman, G.R. (1976) Inversion of the body waves from the Borrego Mountain earthquake to the source mechanism. Bull. Seismol. Soc. Am. 66:1485-1499

Futtermann, W.I. (1962) Dispersive body waves. J. Geophys. Res. 67:5279-5291

Harkrider, D.G. (1970) Surface waves in multilayered elastic media. Part II. Higher mode spectra and spectral ratios from point sources in plane layered earth models. Bull. Seismol. Soc. Am. 60, 1973-1987

Harvey, D.J. (1981) Seismogram synthesis using normal mode superposition: the locked mode approximation. Geophys. J. R. Astron. Soc. 66:37-69

Heaton, T.H., Helmberger, D.V. (1977) A study of the strong ground motion of the Borrego Mountain, California, earthquake. Bull. Seismol. Soc. Am. 67:315-330

Panza, G.F. (1985) Synthetic seismograms: the Rayleigh waves modal summation. J. Geophys.

Panza, G.F., Schwab, F., Knopoff, L. (1973) Multimode surface waves for selected focal mechanisms. I. Dip-slip sources on a vertical fault plane. Geophys. J. R. Astron. Soc. 34:265-278

Suhadolc, P., Marson, I. (1985) The use of synthetic seismograms in the profile interpretation: an example from Friuli, Italy. Terra Cognita 5:300

Swanger, H.J., Boore, D.M. (1978) Simulation of strong-motion displacements using surface-wave modal superposition. Bull. Seismol. Soc. Am. 68:907-922