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A model for the shape of the Fourier amplitude spectrum of acceleration at high frequencies

Anderson, John G. and Hough, Susan E. (1984) A model for the shape of the Fourier amplitude spectrum of acceleration at high frequencies. Bulletin of the Seismological Society of America, 74 (5). pp. 1969-1993. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140819-145139853

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Abstract

At high frequencies f the spectrum of S-wave accelerations is characterized by a trend of exponential decay, e^(−πkf). In our study, the spectral decay parameter k shows little variation at a single station for multiple earthquakes at the same distances, but it increases gradually as the epicentral distance increases. For multiple recordings of the San Fernando earthquake, k increases slowly with distance, and k is systematically smaller for sites on rock than for sites on alluvium. Under the assumption that the Fourier spectrum of acceleration at the source is constant above the corner frequency (an ω^(−2) source model), the exponential decay is consistent with an attenuation model in which Q increases rapidly with depth in the shallow crustal layers.


Item Type:Article
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http://bssa.geoscienceworld.org/content/74/5/1969.abstractPublisherArticle
Additional Information:© 1984 Seismological Society of America. Manuscript received 11 October 1983. K. Aki, J. E. Luco, O. W. Nuttli, and M. Reichle provided helpful critical reviews of this manuscript. We thank T. C. Hanks for calling our attention to the article by Berrill and Hanks, as well as for a thoughtful review of the manuscript. We also wish to acknowledge helpful discussions with J. N. Brune, T. H. Heaton, A. H. Olson, and D. M. Boore. P. Bodin provided much assistance in gathering information for this study. This research was supported by National Science Foundation Grant CEE 81-20096.
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Funding AgencyGrant Number
NSFCEE 81-20096
Issue or Number:5
Record Number:CaltechAUTHORS:20140819-145139853
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140819-145139853
Official Citation:Anderson, J. G., & Hough, S. E. (1984). A model for the shape of the fourier amplitude spectrum of acceleration at high frequencies. Bulletin of the Seismological Society of America, 74(5), 1969-1993.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48694
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:19 Aug 2014 22:31
Last Modified:03 Oct 2019 07:06

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