HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by MOONEY, H. M. Articles by BOLT, B. A. Search for Related Content GeoRef GeoRef Citation

Dispersive characteristics of the first three Rayleigh modes for a single surface layer

DEPARTMENT OF GEOLOGY AND GEOPHYSICS UNIVERSITY OF MINNESOTA, MINNEAPOLIS, MINNESOTA
DEPARTMENT OF GEOLOGY AND GEOPHYSICS UNIVERSITY OF CALIFORNIA, BERKELEY, CALIFORNIA

Abstract

The dispersive characteristics of a single elastic layer overlying an elastic half-space are examined in detail for the fundamental and the first and second higher modes of Rayleigh waves. Phase velocity, group velocity, and the ratio of horizontal to vertical surface displacement are computed as functions of dimensionless quantities proportional to period and wave number.

The significant range for the independent variable, B₁T/H, proves to be largely independent of the parameters of the structure. The range is 1 to 20 for the fundamental, 0.3 to cutoff for the first higher mode, and 0.2 to cutoff for the second higher mode.

The most important parameter of the structure for Rayleigh wave dispersion is the shear velocity ratio. Variations in the Poisson's ratio in the surface layer and the density contrast may produce substantial effects. Poisson's ratio in the half-space is of least significance.

The dependence on model parameters of the long-period cutoff for the higher modes is determined.

Specific results are given for the following geophysical examples: continental crust, continental ice cap, sedimentary basin, alluvial overburden, and laboratory seismic models.

This article has been cited by other articles:

				I. O. Kitov, J. R. Murphy, O. P. Kusnetsov, B. W. Barker, and N. I. Nedoshivin An analysis of seismic and acoustic signals measured from a series of atmospheric and near-surface explosions Bulletin of the Seismological Society of America, December 1, 1997; 87(6): 1553 - 1562. [Abstract] [PDF]

				S. A. Ashford, N. Sitar, J. Lysmer, and N. Deng Topographic effects on the seismic response of steep slopes Bulletin of the Seismological Society of America, June 1, 1997; 87(3): 701 - 709. [Abstract] [PDF]

				J.-K. Chung and Y. T. Yeh Shallow crustal structure from short-period Rayleigh-wave dispersion data in southwestern Taiwan Bulletin of the Seismological Society of America, April 1, 1997; 87(2): 370 - 382. [Abstract] [PDF]

				F. J. Chavez-Garcia and P.-Y. Bard Reply to comment on "Comment on two articles on gravity waves by Chavez-Garcia and Bard (1993a, b)" by c. lomnitz Bulletin of the Seismological Society of America, August 1, 1995; 85(4): 1272 - 1274. [PDF]

				I. N. GUPTA and R. A. HARTENBERGER Seismic phases and scaling associated with small high-explosive surface shots Bulletin of the Seismological Society of America, December 1, 1981; 71(6): 1731 - 1741. [Abstract] [PDF]

				J. R. MURPHY Near-field Rayleigh waves from surface explosions Bulletin of the Seismological Society of America, February 1, 1981; 71(1): 223 - 248. [Abstract] [PDF]

				L. A. DRAKE Love and Rayleigh waves in an irregular soil layer Bulletin of the Seismological Society of America, April 1, 1980; 70(2): 571 - 582. [Abstract] [PDF]

				M. W. ASTEN Geological control on the three-component spectra of Rayleigh-wave microseisms Bulletin of the Seismological Society of America, December 1, 1978; 68(6): 1623 - 1636. [Abstract] [PDF]

				J. L. SEXTON, A. J. RUDMAN, and J. MEAD Ellipticity of Rayleigh waves recorded in the Midwest Bulletin of the Seismological Society of America, April 1, 1977; 67(2): 369 - 382. [Abstract] [PDF]

				D. J. WEIDNER The effect of oceanic sediments on surface-wave propagation Bulletin of the Seismological Society of America, December 1, 1975; 65(6): 1531 - 1552. [Abstract] [PDF]

				S. N. BHATTACHARYA and H. N. SRIVASTAVA Shallow structure of Poona-Karad profile using short-period Rayleigh-wave dispersion Bulletin of the Seismological Society of America, December 1, 1973; 63(6-1): 2197 - 2199. [PDF]

				L. M. FERNANDEZ and J. CAREAGA The thickness of the crust in central United States and La Paz, Bolivia, from the spectrum of longitudinal seismic waves Bulletin of the Seismological Society of America, April 1, 1968; 58(2): 711 - 741. [Abstract] [PDF]

				Z. ALTERMAN and F. C. KARAL JR< Propagation of elastic waves in layered media by finite difference methods Bulletin of the Seismological Society of America, February 1, 1968; 58(1): 367 - 398. [Abstract] [PDF]