Is the seismic moment tensor ambiguous at a material interface?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F13%3A00394892" target="_blank" >RIV/67985530:_____/13:00394892 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/gji/ggt084" target="_blank" >http://dx.doi.org/10.1093/gji/ggt084</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/gji/ggt084" target="_blank" >10.1093/gji/ggt084</a>

Result language
angličtina
Original language name
Is the seismic moment tensor ambiguous at a material interface?
Original language description
The moment tensors are unique and describe the body force equivalents of rupture processes in any medium including faulting at a material interface, defined as the contact of two media with non-zero velocity or density contrasts. From a practical point of view, however, the moment tensor inversion of sources near or at a material interface is more involved than if the medium is smooth in the source area. First, the moment tensors of sources characterized by the same displacement discontinuity display jumps when the source crosses the interface. Consequently, the moment tensors become sensitive to the source location. If the source lies near the interface, the location into an incorrect half-space can introduce errors in the moment tensor. Second, if the source lies at the material interface, some of the spatial derivatives of the Green's function are, in general, discontinuous and the radiated wave field must be calculated using a generalized representation theorem. Third, the moment t
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DC - Seismology, volcanology and Earth structure
OECD FORD branch
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Project
<a href="/en/project/GAP210%2F12%2F1491" target="_blank" >GAP210/12/1491: Physical processes in an earthquake source: from micro- to macro-scale</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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