How to terminate active Notifications thro back end ..

Hi,

we are using service now as management system  and xmatters(alarmpoint) version 4.1 patch 9

Notification agent is down.. once we re-start the notification  agent all the events are  getting re-triggered once again

i just want to know is there any way to find  & terminate the active notifications  before notification agent is up.

Thanks

Senthil Kumar