In the first two minutes after the tremor 100 tweets were posted by people in various locations from Mitcham to Moe.
Initial social media posts suggested the quake was strong but had not caused any serious damage.
Victoria Police are receiving a number of calls in relation to tonight's tremor. At this stage we have no reports of any major damage— VictoriaPolice (@VictoriaPolice) June 19, 2012
I grew up in LA and my personal internal seismograph says: Melbourne earthquake - approx 4-5 on the scale. Awaiting confirmation.— Sandeep Varma (@DizzyDeep) June 19, 2012
As part of the agreed Victorian emergency service social media protocol, the lead agency, VICSES, led the official social media response posting regular updates and advice on their Facebook page.
Those updates were shared by Victoria Police and CFA on their respective social media platforms along with other agency-specific updates.
For example, due to a flood of non-emergency calls to "000" Victoria Police asked people only to phone in an emergency.
We are still receiving a number of calls. Please only call triple zero '000' if you are in an emergency situation.— VictoriaPolice (@VictoriaPolice) June 19, 2012
CFA was also able to identify and dispel rumours that the earthquake had caused an explosion and fire at the Australian Paper Mill, near Traralgon.
Updates on the CFA Facebook page were viewed 80,121 times in the hours after the quake and Tweets on the CFA_Updates Twitter account reached 22,685 people, including many journalists who were reporting what was being said on social media.
CFA, in collaboration with other Victorian emergency agencies, has been exploring ways of filtering and verifying the massive amounts of community information that is now available on social media during emergencies.