Earthworm (Johnson et al., 1995) is an automatic processing system for locating earthquakes. The initial objective of the project, started in 1993, was to provide rapid notification of seismic events. The original requirements were for a system able to manage hundreds of channels in near‐real‐time with robustness and speed but not necessarily to have a persistent memory of the past events. Subsequently, the Interactive Earthworm subsystem was provided in addition to the automatic, and it was made up of several modules for loading information in an Oracle database and then retrieving it for post‐processing and alarm notifications...

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