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Bullet About Cyclone

The word Cyclone is derived from the Greek word "Cyclos" which means coiling of a snake. The word cyclone was coined by Henry Piddington who worked as a Rapporteur in Kolkata during British rule. Size of a cyclone over the north Indian Ocean- The size of a cyclone over Indian seas varies from 50 km radius to 2000 km with an average of 300 -600 km.

It is an intense rotational low pressure system in tropics with huge mass of revolving moisture whirl in the atmosphere with very strong winds circulating around it, in an anti clockwise direction in the northern hemisphere and in clockwise direction on southern hemisphere. It is a vast violent whirl of 150 to 800 km, spiraling around a centre and progressing along the surface of the sea at a rate of approx. 300 to 500 km a day.

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