GNGTS 2015 - Atti del 34° Convegno Nazionale

136 GNGTS 2015 S essione 2.2 of installation. In Italy there were very few experiments in the past and at the moment there are some sparse attempts to produce this kind of valuable data. Our purpose aimed to start to fill this gap in Italy by improving the existing installations, providing uniform recording site characterization and offering a common web portal for the public dissemination of data derived from different owners. The availability of this kind of seismological data, together with the description of the recording site, is essential for the studies on site response analysis in the case of lack of a suitable outcrop rock reference site, but it could also improve the understanding of ground motion attenuation and site effects with implications for ground-motion prediction equation, seismic code provisions and seismic PSHAstudies. NISBAS was developed following the same structure of OASIS - The OGS Archive System of Instrumental Seismology ( http:// oasis.crs.inogs.it , Priolo et al. , 2015a), which in turn is inspired by ITACA database ( http:// itaca.mi.ingv.it , Luzi et al. , 2008; Pacor et al. , 2011). This choice was made in order to make easier the use and helping the interaction among different databases and archives. The NISBAS data are structured in two parts, i.e. Sites , a database that manages all the information of the seismological instrumented sites, and Waveforms , a double archive of waveforms, for the continuous and extracted data, respectively. Access to the site information and data downloads is made through the web portal http://nisbas.crs.inogs.it. Fig. 1 – Station search page of the NISBAS website.