Bulletin of the Seismological Society of America
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Bulletin of the Seismological Society of America; July 1963; v. 53; no. 4; p. 741-764
© 1963 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by TOKSÖZ, M. N.
Right arrow Articles by BEN-MENAHEM, A.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Velocities of mantle Love and Rayleigh waves over multiple paths

M. NAFI TOKSÖZ and ARI BEN-MENAHEM

SEISMOLOGICAL LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA
DIVISION OF THE GEOLOGICAL SCIENCES

Abstract

Phase velocities of Love waves from five major earthquakes are measured over six great circle paths in the period range of 50 to 400 seconds. For two of the great circle paths the phase velocities of Rayleigh waves are also obtained. The digitized seismograph traces are Fourier analyzed, and the phase spectra are used in determining the phase velocities. Where the great circle paths are close, the phase velocities over these paths are found to be in very good agreement with each other indicating that the measured velocities are accurate and reliable. Phase velocities of Love waves over paths that lie far from each other are different, and this difference is consistent and much greater than the experimental error. From this it is concluded that there are lateral variations in the structure of the earth's mantle. One interpretation of this variation is that the mantle under the continents is different from that under the oceans, since the path with the highest phase velocities is almost completely oceanic. This interpretation, however, is not unique and variations under the oceans and continents are also possible.

Group velocities are computed from the phase velocities and are also directly measured from the seismograms. The group-velocity curve of Love waves has a plateau between periods of 100 and 300 seconds with a shallow minimum at about 290 seconds. The sources of error in both Fourier analysis and direct time domain methods of phase velocity measurement are discussed.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
A. Ben-Menahem
A concise history of mainstream seismology: Origins, legacy, and perspectives
Bulletin of the Seismological Society of America, August 1, 1995; 85(4): 1202 - 1225.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
E. A. DEAN
The simultaneous smoothing of phase and group velocities from multi-event surface wave data
Bulletin of the Seismological Society of America, October 1, 1986; 76(5): 1367 - 1383.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
R. J. BROWN
Elimination of near-source ellipticity corrections to body-wave travel times by use of equidistant latitudes
Bulletin of the Seismological Society of America, December 1, 1985; 75(6): 1713 - 1718.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
J. S. DERR
Free oscillation observations through 1968
Bulletin of the Seismological Society of America, October 1, 1969; 59(5): 2079 - 2099.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
D. M. BOORE and M. NAFI TOKSOZ
Rayleigh wave particle motion and crustal structure
Bulletin of the Seismological Society of America, February 1, 1969; 59(1): 331 - 346.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
A. BEN-MENAHEM, H. JAROSCH, and M. ROSENMAN
Large scale processing of seismic data in search of regional and global stress patterns
Bulletin of the Seismological Society of America, December 1, 1968; 58(6): 1899 - 1932.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
F. GILBERT and G. E. BACKUS
Approximate solutions to the inverse normal mode problem
Bulletin of the Seismological Society of America, February 1, 1968; 58(1): 103 - 131.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
R. CHANDER and J. N. BRUNE
Radiation pattern of mantle Rayleigh waves and the source mechanism of the Hindu Kush earthquake of July 6, 1962
Bulletin of the Seismological Society of America, October 1, 1965; 55(5): 805 - 819.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
T. V. MCEVILLY
Central U.S. crust--Upper mantle structure from Love and Rayleigh wave phase velocity inversion
Bulletin of the Seismological Society of America, December 1, 1964; 54(6A): 1997 - 2015.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
G. E. BACKUS
Geographical interpretation of measurements of average phase velocities of surface waves over great circular and great semi-circular paths
Bulletin of the Seismological Society of America, April 1, 1964; 54(2): 571 - 610.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
A. BEN-MENAHEM and M. N. TOKSOZ
Source-mechanism from spectra of long-period seismic surface waves.: 3. The Alaska earthquake of July 10, 1958
Bulletin of the Seismological Society of America, October 1, 1963; 53(5): 905 - 919.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1963 by the Seismological Society of America.