To silence the alarms, you can do 1 of 2 things:

  1. Defer the alarm, which will hide it and disable notifications until the alarms are aged out or cleared.
  2. Acknowledge the alarm as the system is set to send a notification every 6 hours until it is cleared, or aged out, if not acknowledged.

A quick summary of the difference:

Acknowledging an alarm will still keep the alarm visible in the alarm manager and send an alert when it clears, where as deferring an alarm will hide it from the alarm manager until such time as it clears and will not send any further alerts, not even for a clear.