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; August 1969; v. 59; no. 4; p. 1631-1643
© 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 NIAZI, M.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Use of source arrays in studies of regional structure

MANSOUR NIAZI

SEISMOGRAPHIC STATION DEPARTMENT OF GEOLOGY AND GEOPHYSICS UNIVERSITY OF CALIFORNIA, BERKELEY, CA. 94720

Abstract

Seismograms of 26 underground explosions and two cavity collapses at the Nevada Test Site (NTS) and 26 well-recorded earthquakes in central California recorded by a vertical instrument at Berkeley have been studied. It is demonstrated that the use of source arrays instead of instrument arrays may provide information of general nature about the crust-upper mantle structure. The method can particularly be useful in regional reconnaissance of seismic areas with as few as a single recording instrument.

Times of four consistent arrivals on the NTS seismograms are analyzed. The first two arrivals with observed apparent velocities of 8.51 ± 0.47 and 6.41 ± 0.23 km/sec are interpreted as Pn and Pg phases, respectively. A later arrival, named PLP, with an observed slope corresponding to a velocity of 9.80 ± 0.86 km/sec is consistent with P-wave reflections from a depth of 227 ± 22 km.

The observed phases on the seismograms of central California earthquakes suggest a single-layer crust with an average thickness of 20.5 km to the south of Berkeley. The crustal longitudinal and shear velocities are 5.87 ± 0.05 and 3.46 ± 0.05 km/sec, respectively. The observed Pn and Sn velocities are 7.91 ± 0.12 and 4.40 ± 0.10 km/sec, respectively.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
F. Kruger, F. Scherbaum, M. Weber, and J. Schlittenhardt
Analysis of asymmetric multipathing with a generalization of the double-beam method
Bulletin of the Seismological Society of America, June 1, 1996; 86(3): 737 - 749.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
L. G. PEAKE and J. H. HEALY
A method for determination of the lower crustal structure along the San Andreas fault system in central California
Bulletin of the Seismological Society of America, June 1, 1977; 67(3): 793 - 807.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
R. KIND
Residuals and velocities of Pn waves recorded by the San Andreas seismograph network
Bulletin of the Seismological Society of America, February 1, 1972; 62(1): 85 - 100.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
S. K. ARORA
A study of the Earth's crust near Gauribidanur in Southern India
Bulletin of the Seismological Society of America, June 1, 1971; 61(3): 671 - 683.
[Abstract] [PDF]


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