I remember the 1989 Lake Macquarie 5.6 Richter scale earthquake well. I was out the front of my house standing on the gutter sanding the deck of my ski boat (sitting on the boat trailer). I had the oribital sander going and had earmuffs on. The ground started moving and my first reaction was that the ski-boat tralier was rolling down the hill (it wasn't attached to a car at the time). Then the quake sat me on my @rse on the ground. Looked up and saw all the ground around me moving. I didn't hear a thing due to the sander and earmuffs but others reported a huge bang and rumbling.