GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione 2.1 309 Vs profile models were selected as representative of the whole area corresponding to different geological settings. The maximum acceleration (0.6 g) is expected at the site for structures with eigen-period around 0.1 seconds (5 Hz). References Akkar S. and J. J. Bommer; 2010: Empirical equations for the prediction of pga, pgv, and spectral accelerations in Europe, the Mediterranean Region, and the Middle East. Seismological Research Letter, 81, 195-206, doi: 10.1785/gssrl.81.2.195 Ambraseys N. and Adams R. (1991). Reappraisal of major African earth- quakes south of 20°N, 1900-1930, Natural Hazards, 3, 389-419. Ambraseys N.N. and Adams R. (1986). Seismicity of West Africa, Annales Geophys., 6, 679-702. Bardet J.P., Ichii K., Lin H., 2000. Equivalent-linear Earthquake site Response Analyses of Layered Soil, computer program. Cauzzi, C. and Faccioli E. 2008. Broadband (0.05 to 20 s) prediction of displacement response spectra based on worldwide digital records. Journal of Seismology, 12(4), 453–475. Engdahl E.R. and A. Villaseñor, Global Seismicity: 1900–1999, in W.H.K. Lee, H. Kanamori, P.C. Jennings, and C. Kisslinger (editors), International Handbook of Earthquake and Engineering Seismology, Part A, Chapter 41, pp. 665–690, Aca- demic Press, 2002. Gardner J.K. and Knopoff L.; 1974: Is the sequence of earthquakes in southern California, with aftershocks removed, Poissonian? Boll. Seism. Soc. Am., 64, 1363-1367. ISC, 2012. Bulletin of the International Seismological Centre. International Seismological Centre Pipers Lane, Thatcham, Berkshire, RG19 4NS, United Kingdom. http://www.isc.ac.uk . Kreemer, C., W.E. Holt, and A.J. Haines, An integrated global model of present-day plate motions and plate boundary deformation, Geophys. J. Int., 154, 8-34, 2003. Nfomou N.; Tongwa, A. F.; Ubangoh, U. R.; Bekoa, A.; Metuk, N. J.; Victor, H. J. (2004) The July 2002 earthquake in the Kribi region: geological context and a preliminary evaluation of seismic risk in southwestern Cameroon, Journal of Afri- can Earth Sciences, v. 40, iss. 3-4, p. 163-172. Ordaz M., Martinelli F., D’Amico V. and C. Meletti C.; 2013: CRISIS2008: a flexible tool to perform probabilistic seismic hazard assessment. Seismol. Research Letters, 84, 495-504, doi:10.1785/0220120067. Schulte S.M., MooneyW.D., 2005. An updated global earthquake catalogue for stable continental regions: Reassessing the correlation with ancient rifts. Geophysical Journal International, 161: 707 – 721 Schwartz D.P and Coppersmith K.J.; 1984: Fault behavior and characteristic earthquakes: examples from the Wasatch and San Andreas fault zones. J. Geophys. Res., 89, 5681-5698. An empirical relation to evaluate macroseismic intensity in Italy S. Parisi 1 , A. Attolico 2 , P. Harbaglia 3 , A. Molinari 3 , M. Vona 3 1 PROGEON soc. Coop s.r.l. Potenza, Italy 2 Provincia di Potenza, Potenza, Italy 3 Scuola di Ingegneria, Università degli Studi Basilicata, Potenza, Italy The recent release of the new version of the Parametric Catalogue of Italian Earthquakes (Rovida et al. , 2016) and its associated macroseismic data base (Locati et al. , 2016), prompted us to build a new relation that would allow to estimate macroseismic intensities at any given site on the basis of epicentral location, magnitude and epicentral distance. An excellent relation already exists (Pasolini et al. , 2008a, 2008b), however it was developed for an older version of the data base. Moreover the new version of the catalogue gives excellent magnitude estimates, based on the Boxer algorithm (Gasperini et al. , 1999) that allow to disregard the epicentral intensity evaluation. We selected 312 well located events with magnitude greater than 5. It is noteworthy that we substituted the 1456 macroseismic field with that of the three sources as suggested by Fracassi