I'm in Sydney, so I'm relying on you guys to say what it was like. What I do know: The world’s top seismologists just happened to be in Melbourne for a geophysics summit. Coincidence or conspiracy? Hmm...
A screenshot from the government's Geocience Australia web site.
Those crazy members of the International Union of Geodesy and Geophysics (IUGG) bringing earthquakes with them and stuff! The 15 second quake struck near Korumburra at 11:32am, and is said to have shaken buildings. Reports suggest it was also felt across Melbourne's suburbs and as far as Victoria's south.
More at Google and here on Giz as news come to hand.