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Seismic radiation from regions sustaining material damage

Ben-Zion, Yehuda and Ampuero, Jean-Paul (2009) Seismic radiation from regions sustaining material damage. Geophysical Journal International, 178 (3). pp. 1351-1356. ISSN 0956-540X. doi:10.1111/j.1365-246X.2009.04285.x.

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We discuss analytical results for seismic radiation during rapid episodes of inelastic brittle deformation that include, in addition to the standard moment term, a damage-related term stemming from changes of elastic moduli in the source region. The radiation from the damage-related term is associated with products of the changes of elastic moduli and the total elastic strain components in the source region. Order of magnitude estimates suggest that the damage-related contribution to the motion in the surrounding elastic solid, which is neglected in standard calculations, can have appreciable amplitude that may in some cases be comparable to or larger than the moment contribution. A decomposition analysis shows that the damage-related source term has an isotropic component that can be larger than its double-couple component.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ben-Zion, Yehuda0000-0002-9602-2014
Ampuero, Jean-Paul0000-0002-4827-7987
Additional Information:Copyright © 2009 The Authors. Journal compilation Copyright © 2009 RAS. Accepted 2009 June 5. Received 2009 May 4; in original form 2008 December 31. We thank Joe Andrews, an anonymous referee and Editor Massimo Cocco for constructive comments. The studies were supported by the USGS National Earthquake Hazard Reduction Program (grant G09AP00087) and the Southern California Earthquake Center (based on NSF Cooperative Agreement EAR-0106924 and USGS Cooperative Agreement 02HQAG0008).
Group:Seismological Laboratory
Funding AgencyGrant Number
Southern California Earthquake Center (SCEC)UNSPECIFIED
Subject Keywords:Earthquake dynamics; Earthquake ground motions; Earthquake source observations; Theoretical seismology; Dynamics and mechanics of faulting
Issue or Number:3
Record Number:CaltechAUTHORS:20090828-231037246
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:15469
Deposited By: George Porter
Deposited On:14 Sep 2009 23:50
Last Modified:08 Nov 2021 23:19

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