Eyewall replacement cycle
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In meteorology, eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in tropical cyclones. They occur generally with winds greater than 185 km/h (115 mph), or major hurricanes (Category 3 or above).
Eyewall Replacement Cycle Media
Concentric eyewalls seen in Typhoon Haima as it travels west across the Pacific Ocean.
Microwave satellite imagery of Typhoon Gaemi undergoing an eyewall replacement cycle while approaching the northeastern coast of Taiwan
Hurricane Juliette, a rare case of triple eyewalls.
Imagery from the Tropical Rainfall Measuring Mission shows the beginning of an eyewall replacement cycle in Hurricane Frances.
Profile of a hurricane
A microwave pass of Cyclone Phailin revealing the moat between the inner and outer eyewalls.
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