Create a new view, drag the little bar chart icon down, in the query, do an event query, event collection by device per (second|minute) depending on which you want to see, and set your view for last hour or so depending on when the alarm occurred.
This should give you a decent idea of where the spike occurred by the top talkers over the last hours, but it is not 100% definitive, because a device that went from 1-2 logs a day may have just gotten 20 logs causing a 1,000% threshold increase of events, however it is a start.
Hope it helps!
Thanks for the reply. To further expand on what you are saying, I followed the steps to implement the dashboard explained in the article below.
Once I implemented this, I was able to identify which receiver has the increase in EPS. I targeted that receiver, and now I can see when the EPS rate increased and identify what events are occuring. I also created an EPS rate Increase alarm for each receiver to help speed the investigation process.