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 1981; v. 71; no. 3; p. 883-903
© 1981 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 LANGSTON, C. A.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

A study of Puget Sound strong ground motion

CHARLES A. LANGSTON

DEPARTMENT OF GEOSCIENCES GEOPHYSICS PROGRAM
PENNSYLVANIA STATE UNIVERSITY, UNIVERSITY PARK, PENNSYLVANIA 16802

Abstract

An attempt was made to model strong motion velocities and displacements from the 1965 Puget Sound earthquake. Teleseismic P waves recorded at Tumwater, Washington, were also examined to place constraints on allowable interface contrasts and to determine whether lateral heterogeneity is a major factor affecting wave propagation. Although strong motion models qualitatively showed many of the characteristics of near-vertical wave propagation in layered structures, the amplitude behavior of individual stations was quite complex. Data from Tacoma and Seattle sites attained lower velocities and acceleration compared to Olympia. The amplitude behavior is consistent with higher attenuation under Tacoma and Seattle although this is not strictly required. The short-period P data recorded at Tumwater show evidence of large velocity contrast interfaces under the station consistent with those assumed in the crustal models. The teleseismic data also indicated that dipping structure or other lateral heterogeneity is important for Olympia structure. Irrespective of these wave propagation problems, the largest single factor which has affected the level of strong ground motions in Puget Sound is the large source depth of past earthquakes. Thus, estimates of seismic hazard based on a direct interpretation of the strong motion data of the 1965 and 1949 events will be erroneously biased toward less hazard if there is potential for shallow faulting in the Puget depression.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
G. P. Mavroeidis and A. S. Papageorgiou
A Mathematical Representation of Near-Fault Ground Motions
Bulletin of the Seismological Society of America, June 1, 2003; 93(3): 1099 - 1131.
[Abstract] [Full Text] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
G. E. BAKER and C. A. LANGSTON
Source parameters of the 1949 magnitude 7.1 south Puget Sound, Washington, earthquake as determined from long-period body waves and strong ground motions
Bulletin of the Seismological Society of America, October 1, 1987; 77(5): 1530 - 1557.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
S. M. IHNEN and D. M. HADLEY
Prediction of strong ground motion in the Puget Sound region: The 1965 Seattle earthquake
Bulletin of the Seismological Society of America, August 1, 1986; 76(4): 905 - 922.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
C. A. LANGSTON and J.-J. LEE
Effect of structure geometry on strong ground motions: The Duwamish River Valley, Seattle, Washington
Bulletin of the Seismological Society of America, December 1, 1983; 73(6A): 1851 - 1863.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1981 by the Seismological Society of America.