course_updated - object course table record
course_content_removed - object course table record + context property
course_deleted - object course table record + context property
+ course_restored - custom object with courseid, userid and restore information
user_enrolled - object record from user_enrolments table + courseid,enrol
user_enrol_modified - object record from user_enrolments table + courseid,enrol
mod_created - int courseid, int cmid, text modulename - happens when a module is created
mod_updated - int courseid, int cmid, text modulename - happens when a module is updated
+=== blog events
+
+blog_entry_added - blog post object
+blog_entry_edited - blog post object
+blog_entry_deleteded - blog post object
+
*/