https://phys.org/news/2018-07-nasa-typhoon-maria-ragged-eyewall.html

During the eyewall replacement, which usually happens in major hurricanes (Category 3 or greater on the Saffir-Simpson Hurricane Wind Scale) where sustained winds are greater than 115 mph (185 kph), the smaller inner eyewall deteriorates and becomes replaced by a much larger outer eyewall.

At 5 a.m. EDT (0900 UTC) on July 10 the center of Typhoon Maria was located near latitude 24.6 degrees north and longitude 125.6 degrees west. That's about 165 nautical miles southwest of Kadena Air Base, Okinawa Island, Japan. Maximum sustained winds were down to 126.6 mph (110 knots / 203.7 kph). Maria was moving toward the west-northwest near 18.4 mph (16 knots/29.6 kph),