A magnitude-4 earthquake has struck near Queensland's Fraser Island off the state's southern coast, almost two weeks after a larger quake shook the region, Geoscience Australia says.

Senior Seismologist Spiro Spiliopoulos said the quake hit at 11:07 am at a depth of 10 kilometres off Fraser Island.

"It occurred in the same location as those larger quakes two weeks ago, which is about 217 kilometres north-east of Brisbane," he said.

"We think this earthquake is an aftershock following those larger magnitude-5 earthquakes."

Mr Spiliopoulos said there could be even more tremors to come.

"Normally when you get a large earth quake of magnitude 5 you will get a series of aftershocks which will last for some days or weeks afterwards."

He said while the quake was felt mainly in Hervey Bay, it was also detected at Maroochydore and elsewhere on the Sunshine Coast.

He said there were no reports of damage.

On August 1 Queensland experienced its strongest earthquake in almost a century.

The magnitude-5.7 event also occurred off Fraser Island, and could be felt from Bundaberg through to the Gold Coast.

Geoscience Australia said it was equivalent to "15 atomic blasts of energy".

People who experienced the quake took to social media to express their thoughts:

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