GNGTS 2016 - Atti del 35° Convegno Nazionale

316 GNGTS 2016 S essione 2.1 found negligible, in terms of geographical boundaries and seismotectonic characteristics, the ZS9 zones were retained. For some zones, more failure mechanisms were considered possible; in such cases, various estimates of the percentage of occurrence have been assigned (depending on the information available). To cover the whole national territory the SHARE zonation (Giardini et al. , 2013) was also adopted with its rates and Mmax values. The main novelties of the proposed zonation are: • a division of some very large ZS9 zones which, in the opinion of the authors, include seismogenic structures with different geometry and failure mechanisms; • the introduction of new SZs including areas not considered seismogenic until now. The new version of the Italian Parametric Catalogue CPTI15 (Catalogo Parametrico dei Terremoti Italiani) was used for the hazard computation (Fig. 1). �� ���������� � ����������� It represents a significant innovation with respect to the previous ones: - the time coverage, extended from 2006 to the end of 2014; - the associated macroseismic database [DBMI15: Locati et al. (2016)], completely updated; Fig. 1 – In black the A1 zonation; in blue the Mmax macroareas; in pastel colour fill the completeness macroareas and the CPTI15 areal distribution.