Western Australia has rocked by its strongest earthquake in more than 30 years after a 6.6 magnitude tremor close to a popular beach resort.
It struck west of Broome, the United States Geological Survey said this morning.
The quake caused panic as people ran outside amid fears of building collapsing, and tremors were reportedly felt as far away as Indonesia.
There were no immediate reports of damages or casualties.
The undersea earthquake struck between Port Headland and Broome, in the Indian Ocean.
The USGC said it hit at a depth of 21 miles, about 126 miles offshore from the town in the state of Western Australia.
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Pictures show debris strewn around in the aftermath of the quake, which happened shortly before 3.40pm local time.
No tsumani warning has been issued.
Posting on EMSC, one witness wrote: "Freaked out. In a caravan Park and everyone ran outside. Hope there's no tsnami."
Initially it was reported as having a 6.9 magnitude, which would have made it the strongest quake in recent history in Austrlia.
According to Australian Geographic, the previous worst was in Tennant Creek in January 1988, which was 6.6 on the Richter Scale.
No one was injured in the quake 30 years ago, although damage to buildings cost more than $2 million to repair.
People from Port Headland, Karratha, Busselton and Perth all reported feeling tremors.
Resident Matt Young wrote on Twitter: "Just witnessed an Earthquake in Broome...whole grandstand was shaking and people darting away and onto the track."
Another in Broome wrote: "On Cable Beach. Car rocked and ground shook. Pretty strong."
And Pam Walker posted on Twitter: "In Broome it went for well over a minute. Sent the animals scrambling for their hiding spots and we could see the ground literally moving outside.
"The pool looked like someone had jumped in it but had settled my the time I had my phone in hand."
