Breaking: Earthquake reported by residents around Adelaide

Residents from around Adelaide have reported feeling an earthquake this morning, with one saying he heard a rumble when his pot plants started shaking.

Geoscience Australia's website shows a magnitude-4.9 quake with an epicentre in waters south of Adelaide.

Callers to 891 ABC Adelaide reported rattling and shaking this morning, for several seconds.

"I just made a cup of coffee and hopped back into bed and then the whole bed moved and my coffee split," Kate from Reynella in Adelaide's south said.

Brian from Goolwa said he noticed all the pot plants started vibrating and "heard a bit of a rumble".

Josh said he was at Mount Barker when he noticed windows rattling and "the dog went a bit crazy".

"Went about three seconds, definitely an earthquake I think," he said.

Willunga local Mark said he did not hear anything but "the house just started shaking crazily".

"It's not real stable and vibrates when the washing machine's spinning but I got up to check that wasn't on," he said.

"I was sitting at the breakfast table and the next minute the wood started to shake," Goolwa local Heather said.

"It was like several motorbikes starting up at once and everything, the ground, shook. Really moved," another resident, from nearby Hindmarsh Island, said.

Closer to the city, Annie from Glenside, said the apartment vibrated.

"I'm on the third floor of a multi-storey apartment and it just moved from north to south for about four shakes from side to side," she said.