What are the basic knowledge of popular science education: typhoon typhoon?

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the definition of the typhoon, typhoon generalized refers to occur in tropical cyclones in the northwestern Pacific Ocean and the south China sea, including tropical depression, tropical storms, strong tropical storm, typhoon, hurricanes and typhoons. Narrow the typhoon is the underlying wind reached 32. 7m/s（ 12) - More than a tropical cyclone. North or the north Pacific called hurricanes in the Atlantic ocean.

1 typhoon hierarchies, tropical low pressure & ndash; — The bottom center wind up to 6 ~ 7 magnitude, or wind magnitude 7 above. 2, tropical storm & ndash; — The bottom center wind 8 ~ 9, or wind magnitude and likely to remain. 3, strong tropical storm & ndash; — Bottom center wind is 10 ~ 11 grade, or the rafale 11 levels and likely to continue. 4, the typhoon & ndash; — The bottom center wind for grade 12 ~ 13, or wind level 13 and likely to remain. 5, a powerful typhoon & ndash; — The bottom center of wind is 14 ~ 15, or wind 15 and likely to remain. 6, super typhoon & ndash; — The underlying center wind for 16 or above, or wind 17 level and likely to remain.

the typhoon warning signal shows that the typhoon warning signal level 4, respectively, in blue, yellow, orange and red. Blue typhoon warning signal said 24 hours may be or have been affected by tropical cyclones, coastal land average wind up to level 6 or above, or rafale 8 magnitude and likely to continue. Said the typhoon yellow early warning signal may be in 24 hours, or has been affected by tropical cyclones, coastal land average wind up to magnitude 8 or above, or the wind above 10 levels and likely to remain. Orange typhoon warning signal said 12 hours may be or have been affected by tropical cyclones, average winds of more than 10 coastal or land, or wind 12 class above and likely to remain. Said the typhoon red warning signal May 6 hours or has been affected by tropical cyclones, coastal or land, the average wind more than grade 12 level is above or wind up to 14 and likely to remain.

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