A couple of things that may help. When viewing the Event Configuration tool, display the Generated By and Trap Event columns. If the Generated By field is populated, then the event is generated by an Event Rule. When you select the event specified in the Generated By column and click on the Event Rules tab, you will see the details of the Event Rule that generates the event.
The Trap Event field is populated if the event is generated from a trap. To find the AlertMap file entry that generates the trap, I use the following find command executed from the $SPECROOT/SS/CsVendor directory to quickly find the AlertMap file(s):
find . -name AlertMap -exec grep 0x00010013 {} \; -print
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Ctron_CAT/HubCat29xx/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Ctron_CAT/SwCat35xx/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Ctron_CAT/SwCat85xx/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Ctron_CAT/SwCat45xx/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_Router/Rtr_Cisco/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_Router/Cisco6400_DSL/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_Router/UBR72xxCMTS/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_Router/Cisco_12000/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_Router/SwCiscoIOS/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_MC3810/Cisco_MC3810/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./CiscoPIX/CisPIXDev/AlertMap
0.0 0x00010013 1.3.6.1.2.1.1.3(1,0)\
./Cisco_AS5X/AS5x00/AlertMap
Joe