Real Time acquisition and processing of strong motion data in Northern Italy: the RAIS network.

Abstract

This work summarizes the characteristics of a strong motion network (RAIS, in Italian: “Rete Accelerometrica in Italia Settentrionale”, Strong Motion Network in Northern Italy) installed in northern Italy since 2006. The main goal of the RAIS is both to collect data with a wide range of magnitude, allowing us to increase the knowledge of the covered area, and to assure real time high quality data in case of strong events. For each recorded earthquake data are automatically processed in order to fast disseminate the most important ground motion parameters (peak ground acceleration and velocity, 5% damped acceleration, pseudo-velocity and relative response spectra, Arias and Housner intensities). Moreover, for each event, at each recording site, the Horizontal to Vertical Spectral Ratio are calculated. The analysis and metadata related to each event are collected in a web site (http://rais.mi.ingv.it) while the waveforms are distributed at different data center.