The Seismic Station and Site Amplification Service: Continuously Updated Information on Italian Seismic Stations

Abstract We present STATION (Seismic sTATion and sIte amplificatiON—see Data and Resources), the prototype of an innovative service aimed at providing updated information on specific seismological characteristics of more than 2500 Italian and European seismic stations, belonging to both permanent and temporary networks. The stations are characterized by exploiting recordings from about 120,000 earthquakes that have occurred in Italy and neighboring regions in the period from 2005 to 2024. This extensive database includes local magnitude residuals, horizontal-to-vertical spectral ratios (HVSRs), and mean noise spectra, enabling detailed site-specific seismic assessments as well as supporting postevent analyses. Not only is STATION equipped with a user-friendly web interface, but its seismological products can also be accessed directly through specific station queries (see Data and Resources), enabling quick retrieval of scientific results (e.g., HVSR) and associated metadata, which in turn increases the efficiency of the service itself and its interoperability with other web services. The STATION database is designed to be continually updated and expanded as new data become available from the scientific community (e.g., from the installation of new seismic stations and the recording of new earthquakes). Possible future developments and improvements to the service may include the dynamic updating of the database; the introduction of directional HVSRs and summary maps showing the amplification distribution; the dissemination of individual HVSR curves and spectra for specific requests; the calculation and dissemination of probabilistic distributions of noise power spectral densities; the integration of additional parameters describing site amplification effects; its potential extension to other European and possibly non-European regions.