Seismic radiation from regions sustaining material damage
- Creators
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Ben-Zion, Yehuda
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Ampuero, Jean-Paul
Abstract
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.
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).Attached Files
Published - BenZion2009p5797Geophys_J_Int.pdf
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Additional details
- Eprint ID
- 15469
- Resolver ID
- CaltechAUTHORS:20090828-231037246
- G09AP00087
- USGS
- Southern California Earthquake Center (SCEC)
- EAR-0106924
- NSF
- 02HQAG0008
- USGS
- Created
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2009-09-14Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Seismological Laboratory