I checked how often quake activated and it was either 20, 40 or 60 seconds. Made this WA so it's easily trackable.
It'll go off at 19, 39, 59.
This is a collection of 5 auras:
Tick 1 (texture)
Tick 2 (texture)
Tick 3 (texture)
Quake Bar (aurabar)
Quake Icon (icon)