Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/470
DC Field | Value | Language |
---|---|---|
dc.contributor.authorall | Herrero, A.; PhD thesis | en |
dc.date.accessioned | 2005-10-13T13:34:43Z | en |
dc.date.available | 2005-10-13T13:34:43Z | en |
dc.date.issued | 1994-02-25 | en |
dc.identifier.uri | http://hdl.handle.net/2122/470 | en |
dc.description.abstract | The ground motion observation during an earthquake shows some similarity laws, whatever the distance of the observation or the seismic source magnitude. This feature appears in a particular shape of the record spectrum called ``omega square''. Under some simplifying assumptions, obtaining such a spectral shape, in a kinematic approach, needs a slip distribution with a spectrum inversely proportionnal to the squared radial wavenumber, in the case of a constant velocity rupture associated with an instantaneous slip rise time. The numerical model developped in this thesis is based on a limited number of parameters as magnitude and stress drop. Associating this self similary kinematic rupture process to the isochrone concept and ray theory, the computation of the broad band S wave synthetics becomes feasible, at any distance from the fault. Nevertheless, the directivity effect of the rupture generated by such a model produces, as classical models, large amplification factors at high frequencies which are not observed. The observation of spectra recorded during the Landers earthquake (1992) leads to a speculative interpretation of the directivity effect degradation at high frequencies obtained by a perturbation of the rupture direction at small wavelengths. A new model is developped in order to take into account this effect. This last model is used for an application to the seismic risk in the case of the Lambesc earthquake (1909). A parametric study is achieved, which provides response spectra for a specific site and a mapping of the seismic hazard associated to the fault in the region. Finally, the similarity concept is applied to the small earthquakes summation technique to obtain the effect expected for a large one. This approach, in comparison with classical approaches, is not limited in high frequencies and allows to reconstruct more easily the intermediate frequency domain. | en |
dc.description.sponsorship | This thesis has been funded by the Bureau de Recherches Géologiques et Minières. | en |
dc.format.extent | 8225910 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.subject | seismic hazard | en |
dc.subject | slip distribution | en |
dc.subject | kinematic | en |
dc.subject | strong ground motion | en |
dc.subject | directivity | en |
dc.subject | empirical Green's function | en |
dc.title | Space-time and spectrum parameterization of seismic sources : applications to seismic risk | en |
dc.title.alternative | paramétrisation spatio-temporelle et spectrale des sources sismiques : applications au risque sismique | en |
dc.type | thesis | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk | en |
dc.relation.references | Herrero A. (1994). Paramétrisation spatio-temporelle et spectrale des sources sismiques : applications au risque sismique. PhD thesis, Paris. | en |
dc.type.method | PhD | en |
dc.description.fulltext | open | en |
dc.contributor.author | Herrero, A. | en |
dc.contributor.department | PhD thesis | en |
item.openairetype | thesis | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_46ec | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0001-5633-5852 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Article published / in press Theses Manuscripts |
Page view(s)
112
checked on Apr 17, 2024
Download(s) 5
901
checked on Apr 17, 2024