GNGTS 2013 - Atti del 32° Convegno Nazionale

The third group ( synthetics waveforms ) is related to the synthetic waveforms. The waveform query can be made through a simple or an advanced search. Simple searches allow selecting synthetics for a limited number of relevant key fields (PGA, PGV, PGD, magnitude, source distance etc.). Fig. 2 shows an example of a simple search, where data are constrained by: EXSIM code, magnitude range (M w or M l ) between 5.0 and 7.0, epicentral distance less than 50 km, PGA between 400 and 600 cm/s. An advanced search allows retrieving the synthetics using all the available key fields of the SYNTHESIS database. The waveforms resulting from the queries can be downloaded in a compressed file format, which contains unprocessed and processed acceleration, velocity, displacement time-series and acceleration response spectra. An image gallery is also included in the web portal to quickly display and download pictures related to seismic scenarios (PGA, PGV, PGD or SA maps) or earthquake photo collections for historical events (Fig. 3). Final considerations and future improvements. The synthetic waveform database has been designed to be a useful tool for scientific research or practical applications in seismology and earthquake engineering fields (Chiauzzi et al. , 2012). Indeed, waveforms and associated information can be used in a variety of applications, such as, to constrain ground motion prediction equations, to define damage scenario for seismic risk mitigation and as seismic input for site response or structural response analyses. The web portal of the database allows to explore data with a user-friendly interface and to examine seismogenic source geometries, slip distributions, crustal velocity models or other parameters of interest for the ground motion simulations. Fig. 2 – Schematic representation of a simple search of waveforms simulated by the EXSIM code. The data query was carried out with the following constrains: magnitude range (M w or M l ) between 5.0 and 7.0; epicentral distance less than 50 km; absolute Peak Ground Acceleration between 400 and 600 cm/s. The picture also reports an example of data downloading both for processed acceleration and response spectra. 42 GNGTS 2013 S essione 2.1