how are its intensities classified?
"Typhoon", "severe typhoon" and "super typhoon".
Typhoon
Since 2009 the Hong Kong Observatory has divided typhoons into three different classifications: "typhoon", "severe typhoon" and "super typhoon". A "typhoon" has wind speed of 64–79 knots (73–91 mph; 118–149 km/h), a severe typhoon has winds of at least , and a super typhoon has winds of at least .
where do most hurricanes typhoons and cyclones originate Northern Hemisphere
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Typhoon [SEP] Intensity classifications
Since 2009 the Hong Kong Observatory has divided typhoons into three different classifications: "typhoon", "severe typhoon" and "super typhoon". A "typhoon" has wind speed of 64–79 knots (73–91 mph; 118–149 km/h), a severe typhoon has winds of at least , and a super typhoon has winds of at least . The United States' Joint Typhoon Warning Center (JTWC) unofficially classifies typhoons with wind speeds of at least 130 knots (67 m/s; 150 mph; 241 km/h)—the equivalent of a strong Category 4 storm in the Saffir-Simpson scale—as "super typhoons". However, the maximum sustained wind speed measurements that the JTWC uses are based on a 1-minute averaging period, akin to the U.S.' National Hurricane Center and Central Pacific Hurricane Center.