Any earthquake service that maintains a seismic network operates an earthquake monitoring system (EMS), which is a combination of software capable of acquiring, processing, and archiving large volumes of real-time continuous seismic data. Crucially, the processing includes the automatic detection, location, and quantification of earthquakes. Manual review and alert dissemination are typically also core components of an EMS. There are a small number of modern and complete EMSs available to the seismological community; only a couple of these are free. A new seismic network must decide which EMS to operate, and even established networks are periodically required to consider either...

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