GNGTS 2014 - Atti del 33° Convegno Nazionale

GNGTS 2014 S essione 2.2 245 - amplitude values of HVSR peaks in the low frequency range (0.25 – 0.3 Hz) can be significantly affected by sea-waves activities: this makes it an ambiguous index of the actual impedance contrast in the subsoil; - in order to provide an unbiased estimate of the depth of the resonance layer, Eq. (4) (arithmetic weighted average) allows a better valuation of the S V ( h ) profile than the Eq. (3), commonly used to estimate the average S-wave velocity in the first 30 meters (Vs 30 ) for engineering purposes (NTC 2008). References Albarello D., Cesi C., Eulilli V., Guerrini F., Lunedei E., Paolucci E., Pileggi D., Puzzilli L.M.; 2011: The contribution of the ambient vibration prospecting in seismic microzoning: an example from the area damaged by the 26th April 2009 l’Aquila (Italy) earthquake . ����� ������� ����� ������ Boll. Geofis. Teor. Appl., 52, 3, 513-538, doi:10.4430/bgta0013. Bencivenga M., Nardone G., Ruggiero F., Calore D.; 2012: The Italian Data Buoy Network (RON: Proc. Advances in Fluid Mechanics IX . ������ �� ���� ��� ����� ������������������ ����� ��� �������� Edited by WIT, UK, ISBN: 978-1-84564-600-4, 2012, pp. 321-332. Bigi G., Cosentino D., Parotto M., Sartori R., Scandone P.; 1990: S tructural model of Italy, 1:500000. CNR, Progetto Finalizzato Geodinamica. Galli P., Castenetto S., Peronace E.; 2012: The MCS macroseismic survey of the Emilia 2012 earthquakes. Annals of geophysics, 55, 4, 663-672, doi: 10.4401/ag-6163. Ibs Von Seht M. and Wohlemberg J.; 1999: Microtremor measurements used to map thickness of soft sediments. ����� Bull. Seismol. Soc. Am., 89, 250–259. Martelli L., Severi P., Biavati G., Rosselli S., Camassi R., Ercolani E., Marcellini A., Tento A., Gerosa D., Albarello D., Guerrini F., Lunedei E., Pileggi D., Pergalani F., Compagnoni M., Fioravante V., Giretti D.; 2014: Analysis of the local seismic hazard for the stability tests of the main bank of the Po river (Northern Italy). Boll. Geofis. Teor. Appl., http://www2.ogs.trieste.it/bgta/pdf/bgta0094_MARTELLI.pdf , doi:10.4430/bgta0094. Ohori M., Nobata A. e Wakamatsu K.; 2002: A comparison of ESAC and FK methods of estimating phase velocità using arbitrarily shaped microtremor arrays. Bulletin of Seismological Society of America, 92, 6, 2323 - 2332. Okada H.; 2003: The microtremor survey method. Geophysical Monograph Series, SEG, 129 pp. Picozzi M., Parolai S., Albarello D.; 2005: Statistical analysis of Horizontal to Vertical Spectral Ratios (HVSR) . Bull. Seism. Soc. Am. , Vol. 95, No. 5, pp. 1779–1786, doi: 10.1785/0120040152. Pieri M. e Groppi G.; 1981: Subsurface geological structure of the Po Plain. ���������� �� ������������ ������ Pubbl.414, PF Geodinamica, C.N.R. pp. 23. Priolo E., Romanelli M., Barnaba C., Mucciarelli M., Laurenzano G., Dall’Olio L., Abu Zeid N., Caputo R., Santarato G., Vignola L., Lizza C., Di Bartolomeo P.; 2012: The Ferrara thrust earthquakes of May-June 2012: preliminary site response analysis at the sites of the OGS temporary network. Annals of geophysics, 55, 4, 591-597, doi: 10.4401/ag-6172. RER & ENI-Agip; 1998: Riserve idriche sotterranee della Regione Emilia-Romagna. A cura di G. M. Di Dio. Regione Emilia-Romagna, ufficio geologico – ENI-Agip, Divisione Esplorazione & Produzione. ������� �� �������� �� S.EL.CA ., Firenze, pp 120. SESAME - Site Effects Assessment using Ambient Excitations; 2004: Guidelines for the implementation of H/V spectral ratio technique on ambient vibration measurements processing and interpretation. SESAME European project, WP12, Deliverable D23.12.