Scientists are now warning that volcanoes in Western Victoria and South Australia are due to erupt.
The prediction comes just hours after two earthquakes hit the state this morning.
Using new dating techniques, University of Melbourne scientists have found that the volcanoes usually erupt every 2000 years, with the last eruption at Mt Gambier, South Australia, 5000 years ago.
Earth sciences Professor Bernie Joyce says Australia needs a plan in case of an eruption.
It comes as Victorians are warned to brace themselves for more tremors after a shallow magnitude quake hit at 11.32am, sending shockwaves through towns and suburbs more than 100 kilometres away.
Warnings of volcanic eruptions - Yahoo!7