The Event Logger Service is a background service whose job is sole management of all Event related templates and data inside SCS. This service is the one which keeps track of and executes event templates previously defined by the user base. When you start a new event this service loads it into memory and manages all the interactions with all the various people participating. It executes all the action sequences and pulls all the sensor data, essentially it does everything associated with the event at run-time.
When an Event is started the template as it is specified AT THAT MOMENT is saved along with the Event. If you change the template later those changes are only applicable to instances started subsequently and do not have any impact of previously or currently running events.
The Event Logger Service is robust in such that if it is shutdown gracefully (eg the computer is rebooted) it will save the state of all running events and attempt to bring them back online once the system boots back up.
See also: Events Overview
See also: Event Templates
See also: Event Management