Meteorologists noted Statement the system had , at that time , begun Process_start an eyewall replacement cycle ; as a result Causation , the system was considerably less powerful than various intensity Cause_change_of_position_on_a_scale scales hadpredicted .

Marie subsequently underwent an eyewall replacement cycle on August 25 which prompted Causation steady weakening Cause_change_of_strength .

Due to an eyewall replacement cycle , Bejisa weakened Cause_change_of_strength , but re-intensified Cause_change_of_strength to a secondary peak of 160 km/h ( 100 mph ) on January 1 .

Increased Expansion wind shear weakened Cause_change_of_strength the eyewall , which passed Motion_directional within 15 km ( 9 mi ) of Réunion .

Rota was worst affected Influence by Chaba , as the island remained under the storm 's eyewall for several hours .

The typhoon underwent an eyewall replacement cycle , leading to Causation intensity fluctuations .

Soon after , the eyewall passed Motion_directional over the Japanese island of Miyako-jima on September 10 and produced Creating an air pressure reading of , the fourth-lowest recorded Recording in the nation .

Continued intensification occurred Coming_to_be , and Olaf reached Arriving its peak strength Cause_change_of_strength as a Category 1 hurricane with 75 mph ( 120 km/h ) winds on October 5 and developed Coming_to_be a partial eyewall .

After turning Change northward in response Response to a weakening Cause_change_of_strength subtropical ridge , the typhoon underwent a series of eyewall replacement cycles that caused Causation it to weaken Cause_change_of_strength .

After undergoing an eyewall replacement Change cycle , the storm Catastrophe brushed Damaging Rodrigues .

The hurricane moved Motion westward due to a high pressure ridge while undergoing two eyewall replacement cycles : the first was around peak intensity and was completed when the hurricane moved Motion over cooler waters , and the second was a brief cycle shortly after the hurricane began Process_start to weaken Cause_change_of_strength .