Asked by: Anon
A cyclone is a rotating low-pressure weather system with inward-spiralling winds, which spins clockwise in the southern hemisphere and anticlockwise in the northern hemisphere.
Cyclones are referred to by several names, including cyclonic storm, tropical depression, hurricane and typhoon, according to their severity and location.
Cyclones with winds above Force 11 (104km/h) are referred to as hurricanes in the Atlantic, and as typhoons in the Pacific.
Get more fascinating Q&As from BBC Focus magazine by following @sciencefocusQA