@redmeades appeared to be the first to tweet about the quake.
@redmeades (Melbourne, Australia): um earthquake?
More than 800 "earthquake" tweets followed within 15 minutes.
Here were some other tweets in the initial moments:
@crakat (Melbourne, Australia): Hey did you feel that? The whole house shook from side to side! For about 3-5 seconds. Was it an earthquake or an explosion?
@davidcheah (Melbourne, Australia): Wow! Earthquake just hit us out at Croydon. Anyone else out there felt one!!!? Weird feeling, quite long and prolonged and strong too!
@patriciajrogers (Melbourne, Australia): Realising that the shaking and rattling must have been an earthquake. First the fires, now this. Can the locusts be far behind?
@johnkitchen (Brighton, Victoria, Australia): I seriously just felt an earthquake or something like it. In Melbourne? The whole house shook