GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 2.2 GNGTS 2024 Fig. 1 – Data distribuCon for lithological classificaCon grouped by rock categories with similar genesis(lep) and Site classificaCon from NTC18 (right). We then looked for possible correlaCon between different parameters. Fig. 2 shows the comparison between the resonance frequency (f0) values from HVSR on noise and earthquakes at all staCons: in general, for frequencies larger than about 2 Hz, the peak amplificaCons from noise are found at larger frequencies than from earthquakes. Moreover these proxies are compared with magnitude residual from Di Bona et al. (2016), to look for an addiConal relaConship helping to determine a site amplificaCon model. For example the Fig.3 shows the distribuCon of f0 from HVnoise: the magnitude residuals tend to posiCve values as f0 increases. Furthermore, the availability of numerous HVSR curves can be grouped by means of the cluster analysis for the recogniCon of similar characterisCcs. Fig. 2 – Example of correlaCon between f0 from HVSR on noise and earthquakes, having amplitude A0 >= 2 .