GNGTS 2013 - Atti del 32° Convegno Nazionale

This type of processing cannot be a substitution of local specific seismic hazard analysis or of seismic microzonation, because both require more detailed and specific studies for the sites examined (e.g. 1:10,000 geological map, at least). It may be useful to compare the range of values of expected lithological amplified PGA in a certain area, on the basis of knowledge Fig. 3 – a) Modena area: site specific hazard map with PGA values with a 475-years return period computed by considering NTC 2008 AFs based on lithological classification of Italy by INGV-ISPRA (Di Capua et al. , 2011) at 1:100,000 scale (as described in Fig. 2a); b) Modena area: site specific hazard map with PGA values with a 475-years return period computed by considering NTC 2008 AFs based on site classification at 1:50,000 scale by INGV-ISPRA (see Deliverable D2.1), derived by geological data by ISPRA (2009). c) Modena area: coloured circles indicate the percentage variations of amplified PGA values for the nodes in the two maps of and Fig. 3b. d) Udine area: site specific hazard map with PGA values with a 475-years return period computed by considering NTC 2008 AFs based on site classification of Italy by INGV-ISPRA (Di Capua et al. , 2011) at 1:100,000 scale (as described in . e) Udine area: site specific hazard map with PGA values with a 475-years return period computed by considering NTC 2008 AFs based on lithological site classification at 1:50,000 scale by INGV-ISPRA derived by geological data by APAT (2008). f) Udine area: coloured circles indicate the percentage variations of amplified PGA values for the nodes in the two maps in Fig. 3d and Fig. 3f. 122 GNGTS 2013 S essione 2.1