Extended data:
Typhoon (English: Typhoon) Classification of tropical cyclones in Asia-Pacific countries or regions north of the equator and west of international date line. Meteorology, according to the definition of the World Meteorological Organization, the sustained wind speed at the center of a tropical cyclone reaches 12 (that is, more than 64 knots, more than 32.7 meters per second, or more than 1 18 kilometers per hour), which is called a hurricane or other similar words. Typhoon Chiyi in the North Pacific.
Both the World Meteorological Organization and the Japan Meteorological Agency regard this as the highest level tropical cyclone, but some meteorological departments will set a higher level according to their needs, such as the strong typhoon, the super typhoon of the China Central Meteorological Observatory and the Hong Kong Observatory, and the super typhoon of the United States Typhoon Warning Center.