Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7391
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dc.contributor.authorallBordoni, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.contributor.authorallHaines, J.; GNS Scienceen
dc.contributor.authorallMilana, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallMarcucci, S.; Dipartimento Protezione Civileen
dc.contributor.authorallCara, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallDi Giulio, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.date.accessioned2012-01-19T07:33:22Zen
dc.date.available2012-01-19T07:33:22Zen
dc.date.issued2011-02en
dc.identifier.urihttp://hdl.handle.net/2122/7391en
dc.description.abstractWe have studied two velocity-depth models with the aim of outlining the behavior of a velocity reversal in the top layer, which is associated with the stiff Brecce de L’Aquila unit (BrA). In this setting, the SMTH model is topped by a layer with about 2:1 impedance contrast with the underlying layer while the NORV model has no velocity reversal. We have simulated the propagation of SH and P-SV wavefields in the range 0–10 Hz for incidence 0◦ –90◦ . Earthquake spectral ratios of the horizontal and vertical components at six sites in L’Aquila downtown are compared to corresponding syn- thetics spectral ratios. The vertical component of P-SV synthetics enables us to investigate a remarkable amplification effect seen in the vertical component of the recorded strong motion. Sites AQ04 and AQ05 are best matched by synthetics from the NORV model while FAQ5 and AQ06 have a better match with synthetics spectral ratios from the SMTH model. All simulations show this behavior systematically, with horizontal and near-horizontal incident waves predicting the overall pattern of matches more clearly than vertical and near-vertical incidence. The model inferences are in agreement with new geological data reporting lateral passages in the top layer from the stiff BrA to softer sediments. Matches are good in terms of frequency of the first amplification peak and of spectral amplitude: the horizontal compo-nents have spectral ratio peaks predominantly at 0.5 Hz in the simulations and at 0.7 Hz in the data, both with amplitudes of 4, while the vertical component spectral ratios reach values of 6 at frequencies of about 1 Hz in both data and simulations. The vertical component spectral ratios are very well matched using Rayleigh waves with incidence at 90◦ . The NORV model without the velocity reversal predicts spectral ratio peaks for the horizontal components at frequencies up to 6 Hz. The reversal of velocity acts as a low-pass frequency filter on the horizontal components reducing the amplification effect of the sediment filled valley.en
dc.language.isoEnglishen
dc.publisher.nameSpringeren
dc.relation.ispartofBullettin Earthquake Engineeringen
dc.relation.ispartofseries3/9(2011)en
dc.subjectsite effect, 2D synthetic seismograms, spectral ratios, reversal of velocity, L'Aquilaen
dc.titleSeismic response of L’Aquila downtown from comparison between 2D synthetics spectral ratios of SH, P-SV and Rayleigh waves and observations of the 2009 earthquake sequenceen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber761-781en
dc.identifier.URLhttp://www.springerlink.com/content/f0k625v182663136/en
dc.subject.INGV01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagationen
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.04. Ground motionen
dc.identifier.doi10.1007/s10518-011-9247-5en
dc.relation.referencesAmoroso S, Del Monaco F, Di Eusebio F, Monaco P, Taddei B, Tallini M, Totani F, Totani G (2010) Campagna di indagini geologiche, geotecniche e geofisiche per lo studio della risposta sismica locale della città dell’Aquila: la stratigrafia dei sondaggi (Giugno - Agosto 2010). Report CERFIS n. 1, http:// www.cerfis. it/ en/ download/ cat_view/ 67- pubblicazioni- cerfis/ 68- reports Anzidei M, Boschi E, Cannelli V, Devoti R, Esposito A, Galvani A, Melini D, Pietrantonio G, Riguzzi F, Sepe V, Serpelloni E (2009) Coseismic deformation of the destructive April 6, 2009 L’Aquila earthquake (central Italy) from GPS data. Geophys Res Let. doi:10.1029/ 2009GL039145 Atzori S, Hunstad S, Chini M, Salvi S, Tolomei C, Bignami C, Stramondo S, Trasatti E, Antonioli A, Boschi E (2009) Finite fault inversion of DInSAR coseismic displacement of the 2009 L’Aquila earthquake (central Italy). Geophys Res Let. doi:10.1029/ 2009GL039293 Blumetti AM, Di Filippo M, Zaffiro P, Marsan P, Toro B (2002) Seismic hazard of the city of L’Aquila (Ab- ruzzo-Central Italy): new data from geological, morphotectonic and gravity prospecting analysis. Stud Geol Camerti 1:7–18 Bordoni P, Di Giulio G, Haines AJ, Milana G, Rovelli A (2010) Issues in choosing the references to use for spectral ratios from observations and modeling at Cavola Landslide in Northern Italy. Bull Seism Soc Am. doi:10.1785/ 0120090116 Chiarabba C et al (2009) The 2009 L’Aquila (central Italy) Mw6.3 earthquake: main shock and aftershocks. Geophys Res Lett 36:L18308. doi:10.1029/ 2009GL039627 Cirella A, Piatanesi A, Cocco M, Tinti E, Scognamiglio L, Michelini A, Lomax A, Boschi E (2009) Rupture history of the 2009 L’Aquila (Italy) earthquake from non-linear joint inversion of strong motion and GPS data. Geophys Res Let. doi:10.1029/ 2009GL039795 De Luca G, Marcucci S, Milana G, Sano‘ T (2005) Evidence of low frequency amplification in the city of l’Aquila, Central Italy, through a multidisciplinary approach including strong and weak-motion data, ambient noise, and numerical modeling. Bull Seism Soc Am 95(4):1469–1481 EMERGEO Working Group (2009) Evidence for surface rupture associated with the Mw 6.3 L’Aquila earth- quake sequence of April 2009 (central Italy). Terra Nova 22: 43–51. doi:10.1111/ j.1365- 3121.2009. 00915 Galli P, Camassi R (eds) (2009) Rapporto sugli effetti del terremoto aquilano del 6 aprile 2009. DPC-INGV QUEST Team (http:// www.mi.ingv.it/ eq/ 090406/ quest.html) Goldstein P, Dodge D, Firpo M, Minner L (2003) SAC2000: signal processing and analysis tools for seismol- ogists and engineers. In: Lee WHK, Kanamori H, Jennings PC, Kisslinger C (eds) Invited contribution to ‘The IASPEI international handbook of earthquake and engineering seismology’. Academic Press, London Gruppo di lavoro MS (2008) Indirizzi e criteri per la microzonazione sismica. Conferenza delle regioni e provincie autonome. Dipartimento della protezione civile, Roma, vol 3, e Cd-rom Gruppo di lavoro MS_AQ (2010) La Microzonazione Sismica dell’area aquilana. 2 vol + 1 DVD Haines AJ, de Hoop MV (1996) An invariant bedding analysis of general scattering problems. J Math Phys 37:3854–3881 Haines AJ, Hulme T, Yu J (2004) General elastic wave scattering problems using an impedance operator approach—I. Mathematical development. Geophys J Int 159:643–657 Hulme T, Haines AJ, Yu J (2004) General elastic wave scattering problems using an impedance operator approach—II. Two-dimensional isotropic validation and examples. Geophys J Int 159:658–666 Kennett BLN (1983) Seismic wave propagation in stratified media. Cambridge University Press, Cambridge Milana G, Azzara RM, Bergamaschi F, Bertrand E, Bordoni P, Cara F, Cogliano R, Cultrera G, Di Giu- lio G, Duval AM, Fodarella A, Marcucci S, Pucillo S, Régnier J, Riccio G (2011) The contribution of seismic data in microzonation studies for downtown L’Aquila. Bull Earthquake Eng. doi:10.1007/ s10518- 011- 9246- 6 Pino NA, Di Luccio F (2009) Source complexity of the 6 April 2009 L’Aquila (central Italy) earthquake and its strongest aftershock revealed by elementary seismological analysis. Geophys Res Let. doi:10.1029/ 2009GL041331 Stewart JP, Chiou S, Bray JD, Graves RW, Somerville PG, Abrahamson NA (2001) Ground motion evalu- ation procedures for performance-based design. Pacific earthquake engineering research center report 2001/09. College of Engineering, University of California, California Tertulliani A, Arcoraci L, Berardi M, Bernardini F, Camassi R, Castellano C, Del Mese S, Ercolani E, Graziani L, Leschiutta I, Rossi A, Vecchi M (2010) An application of EMS98 in a medium-sized city: the case of L’Aquila (Central Italy) after the April 6, 2009 Mw 6.3 earthquake. Bull Earthquake Eng. doi:10.1007/ s10518- 010- 9188- 4en
dc.description.obiettivoSpecifico4.1. Metodologie sismologiche per l'ingegneria sismicaen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorBordoni, P.en
dc.contributor.authorHaines, J.en
dc.contributor.authorMilana, G.en
dc.contributor.authorMarcucci, S.en
dc.contributor.authorCara, F.en
dc.contributor.authorDi Giulio, G.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentGNS Scienceen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentDipartimento Protezione Civileen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptGNS Science, Dunedin, 764 Cumberland Street, Dunedin 9016, New Zealand-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptDipartimento della Protezione Civile Nazionale, Roma, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.orcid0000-0002-3391-4402-
crisitem.author.orcid0000-0002-2775-4924-
crisitem.author.orcid0000-0002-1702-563X-
crisitem.author.orcid0000-0002-4097-7102-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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