Cyclones cause great effect on the marine life and sea transport systems. Most of us would have seen cyclones in movies and other medias. The one puzzling question which arises at this context is ‘ how cyclones occur? ‘ . From a scientific point of view cyclones occur due to the simultaneous occurring of natural phenomenas in the surface of the ocean. The air at the surface should be warm and moist. This warm air raises from the surface of the ocean towards the sky . As the warm air raises , it leaves an area of low pressure under it . The cold air near the surface moves to this space . And the process continues cyclically . This leads to the whole condition of clouds and atmosphere to move cyclical motion and leads to the formation of cyclone. The cyclone begins at a spot and the center of the cyclone known as eye where the rotation is extreme. When the cyclone hits the land , the speed is reduced gradually due to the absence of energy from the ocean .