By default, SLIC will print out markers for the beginning and end of events as they are simulated.
>>>> BeginEvent <1> >>>> EndEvent <1>
To turn off these messages, e.g. if you are generating a large number of events and want to reduce the log file size, the following two lines should be added to your SLIC macro.
/log/PrimaryGeneratorAction/setLogLevel 0 /log/EventAction/setLogLevel 0
The first command turns off "BeginEvent" and the second disables "EndEvent".