Earthquake
According to Geoscience Australia, the details were:
Date 06/03/2009
Time (UTC) 09:55:37
Latitude -38.39
Longitude 145.79
Depth (km) 8
Magnitude 4.6
Location N of Korumburra Vic
I used to think earthquakes were a bit of a novelty, but after experiencing the Kansai earthquake in Japan in which over 6000 people died, they now scare the shit out of me.