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Failure of self-similarity for large (M_w > 8 1/4) earthquakes

Hartzell, Stephen H. and Heaton, Thomas H. (1988) Failure of self-similarity for large (M_w > 8 1/4) earthquakes. Bulletin of the Seismological Society of America, 78 (2). pp. 478-488. ISSN 0037-1106.

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We compare teleseismic P-wave records for earthquakes in the magnitude range from 6.0 to 9.5 with synthetics for a self-similar, ω^2 source model and conclude that the energy radiated by very large earthquakes (M_w > 8 1/4) is not self-similar to that radiated from smaller earthquakes (M_w < 8 1/4). Furthermore, in the period band from 2 sec to several tens of seconds, we conclude that large subduction earthquakes have an average spectral decay rate of ω^(-1.5). This spectral decay rate is consistent with a previously noted tendency of the ω^2 model to overestimate Ms for large earthquakes.

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Heaton, Thomas H.0000-0003-3363-2197
Additional Information:© 1988 Seismological Society of America. Manuscript received 19 May 1987. The authors benefited from discussions with Hiroo Kanamori and David Boore. We also thank Heidi Houston, David Boore, and Stuart Sip kin for their review of the manuscript.
Issue or Number:2
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Official Citation: Stephen H. Hartzell and Thomas H. Heaton Failure of self-similarity for large (Mω > 81/4) earthquakes Bulletin of the Seismological Society of America, April 1988, v. 78, p. 478-488
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35609
Deposited By: Ruth Sustaita
Deposited On:21 Nov 2012 20:43
Last Modified:03 Oct 2019 04:30

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