[QUOTE="TheLocalYokel, post: 157866, member: 56"
I use EK 380s each year between the UK and Australia and turbulence is a frequent occurrence on the UAE-Oz sector, especially over the Indian Ocean.
A couple of years ago we experienced the worst turbulence I've ever endured in the sense of its degree over such a long period. For nine hours of the 14-hour Melbourne-Dubia flight we experienced almost continuous turbulence, some of it so severe that the cabin staff were strapped in at times with the 380 bouncing around the sky.[/QUOTE]
I've experienced bad turbulence several times, flying over the equator and the Indian Ocean.
I think that the 'Coriolis Effect' has a big impact here. Due to the rotation of the Earth, low pressure systems and tropical storms rotate anti-clockwise in the northern hemisphere and clockwise in the southern hemisphere. This creates turbulence for hundreds of miles to the north and the south of the equator, where the air currents meet.
Add to this, winds over the Himalayas, which can cause high altitude turbulence for hundreds (even thousands) of miles and you can have many hours of a bumpy flight.
Kevin