Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1747
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dc.contributor.authorallNunziata, C.; Dipartimento di Geofisica e Vulcanologia, Università «Federico II», Napoli, Italyen
dc.contributor.authorallFah, D.; Istituto di Geodesia e Geofisica, Università di Trieste, Italyen
dc.contributor.authorallPanza, G. F.; International Centre for Theoretical Physics, Trieste, Italyen
dc.date.accessioned2006-09-29T10:20:27Zen
dc.date.available2006-09-29T10:20:27Zen
dc.date.issued1995-11en
dc.identifier.urihttp://hdl.handle.net/2122/1747en
dc.description.abstractThe seismic ground motion of a test area in the eastern district of Naples was computed with a hybrid technique based on the rnode surnrnation and the finite difference methods. This technique allowed the realistic modelling of source and propagation effects, including local soil conditions. In the modelling, as seismic source we considered the 1980 Irpinia earthquake, a good example of strong shaking for the area of Naples, located about 90 km from the source. Along a profile through Naples, trencling N86°W, the subsoil is mainly formed by alluvial (ash, stratified sand and peat) and pyroclastic materials overlying a pyroclastic rock (yellow Neapolitan tuff) representing the Neapolitan bedrock. The detailed information available on the subsoil mechanical properties and its geometry warrants the application of the sophisticated hybrid technique. For SH waves, a comparison was made between a realistic 2-D seismic response and a standard I-D response, based on the vertical propagation of waves in a plane layered structure. As expected the sedimentary cover caused an increase in the signal's amplitudes and duration. If a thin uniform peat layer is present, the amplification effects are reduced, and the peak ground accelerations are similar to those observed for the bedrock model. This can be explained by the backscattering of wave energy at such a laqer. The discrepancies evidenced between the l -D and the 2-D seismic response suggest that serious caution must be taken in the formulation of seismic regulations. This is particularly true in the presence of the thin peat laqer where the misinatch between the l -D and the 2-D amplification functions is particularly evident in correspondence of the dominant peak and of the second significant peak.en
dc.format.extent3925231 bytesen
dc.format.mimetypeapplication/pdfen
dc.language.isoEnglishen
dc.relation.ispartofseries5-6/38 (1995)en
dc.subjectSeismic hazarden
dc.subjectmicrozoningen
dc.subjectnumerical modellingen
dc.subjectNaplesen
dc.titleMitigation of seismic hazard of a megacity: the case of Naplesen
dc.typearticleen
dc.type.QualityControlPeer-revieweden
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.11. Seismic risken
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorNunziata, C.en
dc.contributor.authorFah, D.en
dc.contributor.authorPanza, G. F.en
dc.contributor.departmentDipartimento di Geofisica e Vulcanologia, Università «Federico II», Napoli, Italyen
dc.contributor.departmentIstituto di Geodesia e Geofisica, Università di Trieste, Italyen
dc.contributor.departmentInternational Centre for Theoretical Physics, Trieste, Italyen
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextWith Fulltext-
item.openairetypearticle-
item.grantfulltextopen-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.deptSwiss Seismological Service (SED-ETHZ), Zürich, Switzerland-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
Appears in Collections:Annals of Geophysics
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