Twitter users described how the noise just before midday made their windows and house “shake”.
One wrote: “Sonic Boom going off over Norwich a short while ago!”
Another tweeted: “Just outside of Norwich and we heard and felt a boom which made the windows shake #sonicboom.”
A third asked: “Anyone else in the Norwich area just hear a huge bang/boom?”
Another posted: “Was there a sonic boom over Norwich? Huge bang just now.”
A fifth said: “Massive boom felt and heard in Hellesdon, Norwich.
“Birds flew off in a mad panic. Anyone know what happened?”
Another tweeted: “Did anyone else hear that loud boom over Norwich at 11:46am? #boom #norwich.”
One more added: “The sonic boom or whatever it was in Norwich just now literally made my house shake. I too am shooketh.”
A sonic boom is heard when an object travels through the air faster than the speed of sound.
Earlier this month, a sonic boom was reported over Cambridge, Hertfordshire, Essex and London.
It was caused when two RAF jets were launched from Coningsby to intercept a private plane that had lost communications.
An RAF spokesperson said at the time: “The RAF can confirm Quick Reaction Alert Typhoon aircraft were launched this afternoon from RAF Coningsby to intercept a civilian aircraft that had lost communications; subsequently, communications were re-established, the aircraft was intercepted and safely escorted to Stansted.
“The Typhoon aircraft were authorised to transit at supersonic speed for operational reasons.”
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