Nine.msn and ABC saying its an A-320, sounds like severe turbulence.
There are reports up to 40 Qantas passengers have been injured in a mid-air turbulence incident over Western Australia.
An Airbus A320 has made an emergency landing at Learmonth Airport near Exmouth in the state's northwest.
Qantas has refused to confirm its plane was involved.
The crew of the affected plane was believed to have issued a mayday call before the landing.
Ambulance and emergency crews are now arriving at the airport.