Tremor shakes suburbs - National - theage.com.au

HA! I win the bet, we were debating these choices for what happened:
1. Small earthquake
2. Methane build up at dump causing an explosion
3. Someone's drug lab blew up

House shook and it sounded like thunder a few times, Dogs in the neighbourhood went batshit.
I'd read that there were earthquakes in NSW that also sounded like thunder yesterday, so I thought that was what it would be. Plus, I couldn't hear any sirens, so obviously not 2 or 3.
Well, I just finished working, so I am off to bed.

Melbourne's south-eastern suburbs were shaken by a mild earth tremor late last night.

A spokesman for the Metropolitan Fire Brigade said calls were received from people in St Kilda, Brighton, Caulfield, Elsternwick, South Yarra and Clayton reporting sounds of explosions and rattling windows over three minutes from 10.40pm.
Tremor shakes suburbs - National - theage.com.au