A mysterious explosion heard across the south-west from Stranraer to Arran at around 12.30pm on Thursday, September 21 may have been a sonic boom from military aircraft sent to intercept two Russian bombers.
Fighter jets from RAF Lossiemouth intercepted two Russian bombers west of Shetland.
The Typhoon fighters met the two Blackjack bombers flying from the direction of Norway and escorted them away from UK airspace.
Aircraft from RAF Coningsby in Lincolnshire were also despatched as a precaution but were not required to intercept the Russian planes.
These may have been the aircraft which produced the sonic boom above Carrick.
The RAF said that the bombers did not enter UK airspace.
It is the latest of a series of recent encounters between RAF fighter jets and Russian aircraft.
Typhoons from RAF Lossiemouth were scrambled to intercept two Blackjack bombers in two similar incidents in October and November 2015.
Russian “Bear” strategic bombers were also intercepted after being spotted north of Scotland in May 2015.
A statement from a Royal Air Force spokesperson said: “We can confirm that quick reaction alert Typhoon aircraft from RAF Lossiemouth intercepted two Russian Blackjack bombers and escorted them while they were in the UK area of interest.
“At no point did the Russian aircraft enter UK territorial airspace.”