GEOLOGY

Detailed explanation-1: -A tropical cyclone is a rapid rotating storm originating over tropical oceans from where it draws the energy to develop. It has a low pressure centre and clouds spiraling towards the eyewall surrounding the “eye", the central part of the system where the weather is normally calm and free of clouds.

Detailed explanation-2: -Overview. Tropical cyclones, also known as typhoons or hurricanes, are among the most destructive weather phenomena. They are intense circular storms that originate over warm tropical oceans, and have maximum sustained wind speeds exceeding 119 kilometres per hour and heavy rains.

Detailed explanation-3: -Cyclones are classified as extra tropical cyclones (also called temperate cyclones); and tropical cyclones. The World Meteorological Organisation (WMO, 1976) uses the term ‘Tropical Cyclone’ to cover weather systems in which winds exceed ‘Gale Force’ (minimum of 34 knots or 63 kph).

Detailed explanation-4: -They are classified as follows: Tropical Depression: A tropical cyclone with maximum sustained winds of 38 mph (33 knots) or less. Tropical Storm: A tropical cyclone with maximum sustained winds of 39 to 73 mph (34 to 63 knots). Hurricane: A tropical cyclone with maximum sustained winds of 74 mph (64 knots) or higher.

Detailed explanation-5: -In fact, tropical cyclones-the general name for the storms called typhoons, hurricanes or cyclones in different parts of the world-always spin counterclockwise in the Northern Hemisphere, and spin in the opposite direction in the Southern Hemisphere.