Most missed today's earthquake but a few report feeling it
UPDATE 3pm: IT might have been small, but a few people have contacted the Daily reporting they felt what may have been this morning's earthquake.
The quake, measuring 4.0 on the Richter scale, was detected about 6.45am off Fraser Island, about 150km east of Rainbow Beach.
This morning, Geosciences Australia said it had only three reports from residents who believed they had felt the quake.
Since then a few other people have commented on the Daily's Facebook page or contacted us directly saying they felt the quake.
Peregian Beach resident Jo, 51, said she felt "a very light shaking in our house", but no-one else in the house noticed it.
Shift worker Troy was up watching TV at the time and said he may have felt it. He said the screen began rocking from side to side. At the time he thought it was caused by a heavy truck driving past, now he's not so sure.
Bundaberg resident Dave said he thought he felt a tremor about 4am and he and his wife's cat was meowing "a lot more than usual", which he thought was strange.
Most people commenting on the Daily's Facebook page said they felt nothing when the earthquake hit. However, a few did.
"I knew there was one," said Coolum Beach resident Tracey Adams. "My computer screen started shaking a little - thought it odd."
Kerrie Farrow said she felt it at Double Island Point and Tina Ward said she felt it at Orchid Beach on Fraser Island.
UPDATE 12.55pm: IT is unlikely earthquakes off the coast of Fraser Island in July and August were to blame for the Inskip sinkhole, a seismologist has said.
Geosciences Australia seismologist Dan Jaksa said while it was possible the magnitude 5.3 earthquake in August and the 5.4 in July had contributed to the Inskip event, their size and distance from the beach made it unlikely they were linked.
Mr Jaksa also pointed out the Inskip event was not a sinkhole as such, but a beach collapse, possibly aided by the short transition from shallow water to deep water in the area.
UPDATE 11.30am: THIS morning's magnitude four earthquake happened almost on top of the two quakes that shook the region in July and August, Geosciences Australia has confirmed.
Senior duty seismologist Dan Jaksa said Australia generally experienced about 50 magnitude four earthquakes each year and about one magnitude five quake a year - so the 5.3 and 5.4 quakes that happened of the coast of Fraser Island a couple of months ago had stirred great excitement in Australia's seismological community.
Earthquake measurement happened on a logarithmic scale, so this morning's 4.0 quake was somewhere in the order of 32-times less powerful than the July and August quakes, accounting for the lack of impact on the mainland.
Mr Jaksa said Geosciences so far had only three reports from people who believed they had felt this morning's quake - one at Brisbane, one at Morayfield, and one at Maaroom.
Asked if it was possible some of those people might have imagined having felt an earthquake after hearing about it, Mr Jaksa said it was also possible that someone in a quiet area might notice the actual quake while people around them did not.
Earthquakes are generally known for happening on the boundaries of tectonic plates, where large parts of the earth's crust crash into each other, but Mr Jaksa said earthquakes could and did happen anywhere.
"If you think of Australia as a car and out bumper is Papua New Guinea and that's colliding with the Pacific Plate and creating the Papua New Guinea highlands in the same way as, in India, it's creating the Himalayas," Mr Jaksa said.
"If you have a minor head-on crash, the front off your bumper will be damaged but you might also find you get a crack in your windscreen."
The three quakes off Fraser Island were kind-of like the crack in the windscreen - faults in the tectonic plate that allowed heat escaping the earth's core to transform into kinetic energy and create a little earthquake.
Sometimes those cracks in the windshield could be quite dramatic and dangerous, such as the 5.7 quake that hit Newcastle in 1989, killing 13 people and causing about $1.1b in damage to the city.
Australia's earthquakes weren't a patch on the monsters that happen on the edge of tectonic plates, such as the 6.3 quake that devastated Christchurch in 2011 or the 7.0 that all but wiped out Port au Prince in Haiti in 2010.
But what quakes we did have hit harder, because we're just not used to them.
"Earthquakes in Australia can be more dangerous than in New Zealand because they're not as frequent and we are not as prepared," Mr Jaksa said. "The community and infrastructure are not as resilient."
The Newcastle earthquake illustrated that shortfall clearly and resulted in permanent changes to the way Australia built houses.
INITIAL REPORT: AN earthquake registering 4 in magnitude has been detected about 150km east of Rainbow Beach.
However, it's unlikely the quake would have been felt on the coast, with Geoscience Australia's earthquake division saying it may have been felt up to 62km from its epicentre - leaving any ground shaking still more than 50km from shore.
The quake, which happened about 6.45am Queensland time at a depth of about 10km.
DID YOU FEEL THE QUAKE? TELL US HOW IT FELT AT YOUR PLACE
Intial reports from Geosciences suggested the quake had happened about 60km east of Caloundra and may have been felt on Moreton Island.
There have been reports the earthquake was felt by residents in Gympie and the Sunshine Coast.
When asked if anyone in these areas felt this morning's quake, Angie Andrews on the Sunshine Coast said:
"Yes I felt a slight shake this morning, not enough to wake the dog though."
Bernadette Mac, also on the Sunshine Coast said: "Yes woke me up!"
In Gympie, Chris Roberts said: "This is why our windows rattled" and Amanda Bowden said: "Yer [sic] I wondered if it was? So i know now for sure."
This is the latest in what appears to be a string of tremors affecting the state.
In late July, a 5.2 magnitude quake struck about 150km east of Fraser Island, shaking homes from Bundaberg to Brisbane.
It caused delays to train schedules as railway lines were inspected for signs of damage.
It was severe enough to cause a slight cracking to the walls of a home in Nambour and surprise staff members in the Sunshine Coast Daily office in Maroochydore.