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; June 1969; v. 59; no. 3; p. 1281-1305
© 1969 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 MCGARR, A.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Amplitude variations of Rayleigh waves—propagation across a continental margin

ARTHUR MCGARR

LAMONT GEOLOGICAL OBSERVATORY OF COLUMBIA UNIVERSITY, PALISADES, NEW YORK 10964

Abstract

Seismograms from Berkeley and from a site on the deep ocean bottom off California were compared to ascertain the effect on Rayleigh waves of propagation across the continental margin. Amplitude ratios as a function of period were formed by dividing the spectral component at one recording site by that at the other recording site. In the period range from 14 to 25 sec and for near-normal incidence, the amplitudes of vertical displacement on the ocean bottom were two-thirds to one-third as large as those at Berkeley. Amplitude ratios for waves propagating in either direction across the margin are consistent within experimental error.

Comparison of the experimental amplitude ratios with ratios that were calculated by using a variational technique recently advanced by McGarr and Alsop suggests that there is a striking contrast in structure between Berkeley and the ocean-bottom site, which is about 235 km WNW of Berkeley. The velocities and densities of the lower crust and upper mantle beneath the oceanic site are much higher than those beneath Berkeley; this result is in qualitative agreement with the results of geophysical studies in this region using other techniques.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
R. J. WETMILLER, J. ADAMS, F. M. ANGLIN, H. S. HASEGAWA, and A. E. STEVENS
Aftershock sequences of the 1982 Miramichi, New Brunswick, earthquakes
Bulletin of the Seismological Society of America, April 1, 1984; 74(2): 621 - 653.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
H. S. HASEGAWA, J. C. LAHR, and C. D. STEPHENS
Fault parameters of the St. Elias, Alaska, earthquake of February 28, 1979
Bulletin of the Seismological Society of America, October 1, 1980; 70(5): 1651 - 1660.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
L. A. DRAKE and B. A. BOLT
Love waves normally incident at a continental boundary
Bulletin of the Seismological Society of America, August 1, 1980; 70(4): 1103 - 1123.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
T. C. BACHE, W. L. RODI, and D. G. HARKRIDER
Crustal structures inferred from Rayleigh-wave signatures of NTS explosions
Bulletin of the Seismological Society of America, October 1, 1978; 68(5): 1399 - 1413.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
G. C. ROGERS and H. S. HASEGAWA
A second look at the British Columbia earthquake of June 23, 1946
Bulletin of the Seismological Society of America, June 1, 1978; 68(3): 653 - 676.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
S. GREGERSEN and L. E. ALSOP
Mode conversion of Love waves at a continental margin
Bulletin of the Seismological Society of America, December 1, 1976; 66(6): 1855 - 1872.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
J. F. EVERNDEN
Further studies on seismic discrimination
Bulletin of the Seismological Society of America, April 1, 1975; 65(2): 359 - 391.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
L. REITER
Reflection, refraction and mode conversion of long-period surface waves and the measurement of Q-1 for free oscillations
Bulletin of the Seismological Society of America, October 1, 1973; 63(5): 1709 - 1722.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
H. S. HASEGAWA
Surface- and body-wave spectra of CANNIKIN and shallow Aleutian earthquakes
Bulletin of the Seismological Society of America, August 1, 1973; 63(4): 1201 - 1225.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
L. A. DRAKE
Love and Rayleigh waves in nonhorizontally layered media
Bulletin of the Seismological Society of America, October 1, 1972; 62(5): 1241 - 1258.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
L. A. DRAKE
Rayleigh waves at a continental boundary by the finite element method
Bulletin of the Seismological Society of America, October 1, 1972; 62(5): 1259 - 1268.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
D. LOEWENTHAL and Z. ALTERMAN
Theoretical seismograms for the two welded quarter-planes
Bulletin of the Seismological Society of America, April 1, 1972; 62(2): 619 - 630.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
A. MCGARR
Amplitude variations of Rayleigh waves--horizontal refraction
Bulletin of the Seismological Society of America, June 1, 1969; 59(3): 1307 - 1334.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1969 by the Seismological Society of America.