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; October 1963; v. 53; no. 5; p. 893-903
© 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 BENIOFF, H.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Source wave forms of three earthquakes

HUGO BENIOFF

SEISMOLOGICAL LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA

Abstract

Strain seismograms of the Montana shallow earthquake of August 17, 1959 recorded at Isabella, California have the wave pattern predicted in 1904 by Lamb for a surface pressure pulse. This is equivalent to a dipole source such as given by the vertical bilateral fault slip which was observed at the surface. Similar recordings made at Ñaña of the deep Peruvian earthquakes of August 19 and 30, 1961, ({Delta} = 600 ± km, h = 600 ± km) have the pattern calculated by Pekeris for a buried vertical downward force in the form of a step in time. It thus appears that these shocks were generated by a sudden volume contraction at the focus which could be the result of a sudden change of state.

Failure of conventional seismographs to record the patterns calculated by Lamb and by Pekeris is due to their low sensitivity to the very long period ground movement components involved, and their relatively high sensitivity to the short period components which are rendered oscillatory by the departure of the crustal characteristics from the homogeneous half space assumed in the theoretical computations.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
C. J. WIDEMAN and M. W. MAJOR
Strain steps associated with earthquakes
Bulletin of the Seismological Society of America, December 1, 1967; 57(6): 1429 - 1444.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
F. F. EVISON
On the occurrence of volume change at the earthquake source
Bulletin of the Seismological Society of America, February 1, 1967; 57(1): 9 - 25.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
J. L. BLAYNEY and R. GILMAN
A portable strain meter with continuous interferometric calibration
Bulletin of the Seismological Society of America, December 1, 1965; 55(6): 955 - 970.
[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
J. C. SAVAGE
The stopping phase on seismograms
Bulletin of the Seismological Society of America, February 1, 1965; 55(1): 47 - 58.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
M. J. RANDALL
Seismic energy generated by a sudden volume change
Bulletin of the Seismological Society of America, October 1, 1964; 54(5A): 1291 - 1298.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
H. D. FARA
A new catalogue of earthquake fault plane solutions
Bulletin of the Seismological Society of America, October 1, 1964; 54(5A): 1491 - 1517.
[Abstract] [PDF]


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