Abstract
Users can interactively query, search, and download parametric information, and digital recordings collected by the Italian Telemetered Seismic Network (ITSN) through the Istituto Nazionale Di Geofisica Seismic Network Databank (ISND). The databank is completely menu‐driven and easy to use.The ITSN comprises about 80 seismic stations (Figure 1) equipped with several seismometers acting at a critical damping of 70% and characterized by a period of 1 Hz. The seismometers' signals are transmitted over telephone lines or radio relay systems and then demodulated and recorded by an automatic acquisition system developed in cooperation with the U.S. Geological Survey. Digital data are stored on a magnetic disk and then processed through interactive procedures. The automatic selection of the seismic phases is checked daily and eventually corrected by seismic analysts. New data are available to users within a week.
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