Syslog for Banned / Quarantined IP

Hey all, 

I have syslog configured and receiving all my data beautifully in GrayLog.

What I'm not getting, is any indicator that an IP has been added to Quarantine / Banned IP. 

FortiOS 5.6.5

I.E.  I received an IPS trigger today from 117.1.189.196, and all I see is the IPS event.  The IP is now in banned IP tab, but I want to set up a notification/report of these IPS whenever they are quarantined.  Is there a specific facility, or am I missing something?  

Thanks.