The AuditingEvents table is a great table to create an alert when nodes are deleted. I have found this is preferred over relying on Events table. Solarwinds Alert Manager provides a template alert called 'Alert me when a Node is deleted' which uses the AuditingEvents table. Have found that this table (AuditingEvents) does contain 3 fields (NetworkNode, NetObjectID, NetObjectType) which are NEVER populated. It would be very convenient if these fields were populated when applicable to make enhancing the alert to include other node details easier and avoid having to create a custom sql alert.