Australian actress Teresa Palmer, her husband and their two children live tweeted the 'scary' situation.
She described the incident as 'violent' as the family's tree-house accommodation became 'scarily' unstable as the quake first hit while their kids were sleeping.
'We felt it here in Ubud and it was violent. We are staying in a tree house and it was swaying like crazy. Very scary. Stay safe everyone,' she said.
Federal Home Affairs Minister Peter Dutton, who was in Bali for a terrorism meeting, told the Sydney Morning Herald the quake was 'powerful enough to put us on the floor.