Looking at the main alarm dashboard I can see 20+ critical alarms, if I expand the alarm widget and filter to critical only I only see 4 alarms.
Is it possible to filter this view to see all critical alarms in the alarms analytics window or is it limited by date?
You are looking at different data sets with the different views.
The main alarm page deals in OPEN alarms only (notice some are over a year old)
When you open the canvas view/analytics tab, this list is all OPEN and CLOSED but has a limit of 30k alarms.
So you don't see some of the older alarms as they are beyond the 30K alarms.
You can get a closer number if you go to the (MPA-2.2) Wrench/Alarm Query and filter on Severity = Critical and Status = NEW. This list isn't identical as it shows the alarms whose end time was today.
Hope that helps