The aircraft can be seen bracing 300km winds as the plane's internal pressure gauge peaks at its maximum reading and the aircraft is lashed with rain.
The US-bound storm is now so strong that it is showing up on equipment designed to measure earthquakes.
Stephen Hicks, a seismologist at the National Oceanography Centre Southampton, said seismometer recordings on Guadeloupe show the storm approaching the Lesser Antilles, another Caribbean island group.
Hurricane Irma – in pictures
Irma, which is already the strongest hurricane ever recorded outside the Caribbean and the Gulf of Mexico, is likely to make landfall somewhere in Florida over the weekend.
Florida, Puerto Rico and the US Virgin Islands have declared states of emergency.
Florida's governor Rick Scott warned the storm could impact "millions of Floridians".
It comes as Texas continues to reel from the devastation caused by Hurricane Harvey in August.
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