How to deal with Event Records in Telecoms?

I have a situation where I need to store and generate reports out of Event Records in a Telecom. The data source is Event logs with multiple events happening one after the other. Each event has different number and type of fields. I am mostly interested in SIM activations right now but there might be future use cases for other events.

I was initially going to have a separate table for each event type but there might be cases in the future where I need to look at a group of related events together. In that case if I store these events in separate tables I might now be able to recreate the original order of events.

What are good practices for this kind of data?