Well, for Melbourne, Australia it was an earthquake anyway.
Here’s a screenshot from Australian Geoscience website.
The large red dot was where it occurred.
It was a 6 on the Magnitude scale, or a “what the fuck was that?” on my weird shit-o-meter.
Nothing was damaged or broken, and to be honest, I was a little surprised by it, seeing as the last earthquake to hit Melbourne was about 35 years ago. O_o