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 2006; v. 96; no. 4A; p. 1474-1482; DOI: 10.1785/0120050160
© 2006 Seismological Society of America
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
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 Web of Science (1)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tsuda, K.
Right arrow Articles by Assimaki, D.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Site-Response Estimation for the 2003 Miyagi-Oki Earthquake Sequence Considering Nonlinear Site Response

Kenichi Tsuda1, Jamison Steidl2, Ralph Archuleta1 and Dominic Assimaki3

1 Department of Earth Science and Institute for Crustal Studies
University of California
Santa Barbara, California 93106-1100
 (K.T., R.J.A.)
2 Institute for Crustal Studies
University of California
Santa Barbara, California 93106-1100
 (J.S.)
3 Civil and Environmental Engineering Department
Georgia Institute of Technology
Atlanta, Georgia 30332
 (D.A.)

The Mw 7.0 Miyagi-Oki earthquake, which occurred on 26 May 2003, was well recorded by the KiK-net and K-net networks. A large number of stations recorded very high peak ground accelerations above 0.5g and large peak ground velocities above 0.5 m/sec. These high ground-motion values are thought to come from a combination of the effect of shallow sediment layers of the upper couple of meters and the enhanced high-frequency ground-motion content associated with this intraslab earthquake. The objective of this study is to examine the effect of sediment amplification at network stations with peak ground acceleration ≥0.3g. Linear site response is first estimated from observed weak motion (aftershock) records. In this case, we use a spectral inversion method, without reference stations, to separate the source, path, and site-response effects. The resulting weak motion analysis for the source, path, and site response agree with other previous studies. The mainshock site response is obtained separately using the same spectral inversion technique with the addition of a frequency-dependent radiation pattern. The comparison of the site amplification from aftershocks with the mainshock indicates the possibility of nonlinear site response at many stations during the Mw 7.0 event. The results also suggest a correlation between low near-surface material velocity and the degree of nonlinearity.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
D. Assimaki, W. Li, J. H. Steidl, and K. Tsuda
Site Amplification and Attenuation via Downhole Array Seismogram Inversion: A Comparative Study of the 2003 Miyagi-Oki Aftershock Sequence
Bulletin of the Seismological Society of America, February 1, 2008; 98(1): 301 - 330.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2006 by the Seismological Society of America.