If you're on the CLI, you can try:
show events alerts past 23:59 | include Deny
The 6.0 Command Reference infers the "include-traits" may also give you what you want. Unfortunately, I can't the trait to number table anywhere.
show events alerts include-traits #
where the # is 0-15 represent the traits you'd liked displayed.
Show Event Command
http://www.cisco.com/en/US/docs/security/ips/6.0/command/reference/crCmds.html#wp439833
