Upper Hunter locals were woken in the early hours of Tuesday morning to a bit of a rumble.
A 3.4 magnitude earthquake has been recorded at Muswellbrook, just south of Edderton.
Geoscience Australia says it struck at a depth of 3 kilometres, and has been felt from Denman through Muswellbrook and up to Aberdeen.
There are no reports of any injuries, deaths or structural damage as a result of the quake.