What is the average size of the eye of a hurricane?

The average size (diameter) of the eye of a hurricane is 30 km (18.5 mi). The eye of the hurricane, a region of calm and light winds at the center of the storm, typically forms when the windspeeds reach 138 km/hr or 85 mph. The eye can be as small as a few km in diameter, or as large as 320 km in diameter (the diameter of Typhoon Carmen).

Source: NOAA

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