Indonesian authorities said the quake, which struck at 2.16pm AEDT and was centred 100km southwest of Denpasar, had a magnitude of 6.8 and struck at a depth of 10km. However, the USGS put the magnitude at 6.0 and the depth at 61km.
A Department of Foreign Affairs and Trade spokeswoman said the Australian Consulate-General in Bali was urgently seeking to confirm whether any Australians were affected by the quake. "There have been no reports to date of any Australians affected,'' she said.The US Geological Survey advised the earthquake was unlikely to cause a tsunami.''
Footy players holidaying on the island were quick to react on Twitter. Collingwood's Travis Cloke posted: "Ok that was different, earth quake in Bali. It was a good 20sec of rock and rolling!".
St Kilda's Jason Gram didn't seem the worse for wear, tweeting: "Just had my 1st earthquake hahaha awesome". Bali boy building evacuated: The quake caused the evacuation of the police headquarters in Denpasar where a 14-year-old Australian boy is being detained.
Hundreds of people poured out of the police headquarters and surrounding buildings after the quake struck, but the prisoners at the police lock-up were reportedly kept inside the building after being let out of their cells. The teen has been held there since being arrested for allegedly buying a small amount of cannabis last week. Supermarket ceiling collapse
Early reports from other Australians in Bali suggested sections of a supermarket ceiling in the popular Seminyak area had collapsed but no shoppers are believed to be injured. Jack Chisholm, who runs a surfing business two blocks from the supermarket, said he felt the ground start to shake shortly after lunch today. "It was like you were standing on the deck of a boat in a heavy sea,’’ the former Geelong resident said.
As it happened: Click here to see how people reacted to the quake online: Radio 3AW reporter Larisa Tait, at a resort near Seminyak, was among the large numbers of Australians holidaying in the region.
"We were all lying by the pool, and the ground started rumbling beneath us … we thought it may have been construction down the road, but then staff came running, yelling earthquake! earthquake!""There was quite a big shake at the end, it probably only lasted 20 to 30 seconds."
Strong shaking was felt for several minutes in the main tourist district of Kuta, said Endro Tjahjono from the Bali office of Indonesia's Meteorology and Geophysics Agency.
"There was panic, everyone ran out of the buildings. When we returned to our office building, we saw some cracks on the wall and plaster had come off the walls,'' he told AFP.
Early exit plans: Aussie tourists tell of quake terror: Hundreds of tourists and staff were also evacuated from Hardy's, a major department store in the town of Sanur. Indonesia sits on the Pacific "Ring of Fire'', where the meeting of continental plates causes high seismic activity, and is frequently hit by earthquakes.
Quake hits off US: Meanwhile, a moderate 5.9-magnitude earthquake also rumbled off the coast of the US state of Oregon, the US geological survey said.
There was no immediate tsunami warning or reports of damage. The USGS said the epicentre was 221km west of the seaside town of Bandon in the southern part of the northwestern US state, at a depth of 10km below the earth's surface.