A Typhoon fighter jet. It is not yet clear which aircraft caused the noise (Picture: PA)

People in a Cornish town reported their houses ‘shook’ after a sonic boom caused by an RAF aircraft.

One man wrote on Twitter: ‘Big explosion just shook my house.’

Another said: ‘I think it’s jets – a sonic boom from one. Can’t normally hear airplanes but can today.’.

An RAF spokesman confirmed: ‘The sonic boom heard in the Cornwall area today was caused by RAF F-35 Lightning aircraft completing operational training inside the supersonic offshore range area.

‘Any inconvenience caused to local residents is regretted.’

Supersonic flight in offshore military training ranges for RAF and allied fighter aircraft is routine, however the sound is not usually heard on the mainland.

The flightpath of an RAF aircraft flying above Cornwall today (Picture: FlightRadar24.com)

The aircraft concerned were approximately 25miles off the coast when completing supersonic flight today.

The climatic conditions today may have been a factor.

Cornwall is due to host the G7 summit at Carbis Bay in June, so the military is expected to carry out training exercises in preparation for the security operation.

On Monday, a helicopter believed to be an RAF Chinook was seen flying low above Wadebridge and the surrounding areas.