An earth tremor has hit parts of Victoria and Melbourne's eastern suburbs for the second time in a fortnight.

Geoscience Australia says the quake had a preliminary magnitude of 4.6 and hit at Korumburra, about 100 kilometres south-east of Melbourne, at about 4:30 pm.

Initial reports said the tremor lasted between four and 10 seconds.

Spiro Spiliopolous from Geoscience Australia says today's tremor was almost as big as one which hit 11 days ago.

"We've given this earthquake a magnitude of 4.6; that's a preliminary magnitude at this stage, it might change over time," he said.

"This earthquake's located pretty close to the last earthquake that occurred at Korumburra just over a week ago. It's unusual to get two earthquakes of this size within a couple of weeks of each other."

Allan Briggs of the SES says there have not been any reports of damage.

"The SES is asking people that have had damage to their property to call 132 500, we ask you to turn the power, water and gas off," he said.

Peter Sutton of Warragul, 100 kilometres south-east of Melbourne, says the tremor was very strong.

"I was sitting in the chair about to put the TV on; there was a giant crack and everything began to shake for about five or six seconds," he said.

"It felt like the whole house was shaking; the whole house was moving from side to side."

One ABC contributor, Jill Price from Forest Hill, says she felt "the whole house rattle and shake for about 50 seconds".

Rob Bisco from Berwick also said the tremor lasted for about a minute but Heather E from Box Hill said she felt two tremors, each about three seconds long.

Several contributors said the tremor felt stronger than the one two weeks ago.

Another ABC contributor, John Kis in Fitzroy, says he felt the tremor at 4:29pm AEDT.

"I immediately got a instant message from my friend in Elwood," he said.

He says the message read: "Spesh: was playin ps3, my couch started wobbling, I thought, 'This game is awesome'."

Another ABC contributor, Karo Williams, also initially thought the tremor was just a video game.

"My son was playing on his video game attacking zombies and I thought it was the subwoofer until the sofa continued to vibrate, then I realised it was another earth tremor," he said.

Several ABC contributors reported hearing a loud noise at the start of the tremor, with one, Cindy, describing it as "two low, deep-sounding bangs in about five-10 second intervals".

"Most people in the Mulgrave office commented and felt the vibration. Heard a 'crack' noise and felt the vibration for about 10 seconds. Computer monitor gently shook during the event," said Philip Adams.

"I'm in Lang Lang and it felt worse than the last one. It sounded like someone threw a basketball or something similar at our glass sliding door. Also heard the glass cabinet shaking and the glasses clinking together," said Kristy Kilpatrick.

Other contributors said they thought the tremor was just a strong wind.

"I was reading through the ABC News online this afternoon when I felt what appeared to be a huge gust of wind shaking the house," Julie Nitz said.

"When I turned my head to look out the window I noticed the front gate was ajar but it was perfectly still. The trees weren't even moving.

"On second thought, was that another earthquake? It appears so. Now I am really getting worried."

"I felt it very strongly; it sounded like a huge gust of wind and my whole house shook for about 20 seconds. Bigger than the [tremor on the] 6th; I got scared this time," Jamie Woodleigh said.

You can listen to earthquake talkback now on 774 Melbourne's Drive program.