Third time for me two others in Canberra.
The first was aftershock from the Newcastle quake. Slight tremor. Second was early hours of the morning, grinding noise like brakes on a semi, I thought it was a truckie losing control of the vehicle. After checking that it had not run into houses, went back to sleep.
This one was more scary, whole house shook
I donāt know about that, I supplied geoscience Aust with seismometers for about 10 years.
Trouble is, its not good business. They last for decades and Australia is not getting any bigger.