AN explosion heard by villagers in Goathland and Robin Hood's Bay on Thursday afternoon is thought to have been a sonic boom.
Whitby Gazette readers contacted the paper to say they heard the deafening noise at around 2.30pm.
The term sonic boom is commonly used to refer to the shocks caused by the supersonic flight of an aircraft. They generate enormous amounts of sound energy, sounding much like an explosion.
A woman who was out walking her dogs in Robin Hood's Bay was near Old St Stephen's Church and stopped in her tracks when she heard the noise.
"There was a vapour trail in the sky. I think there was two but another man said there was four," she said.
"I didn't see any planes. It looked like they were doing acrobatics because of the vapour trail but I couldn't see them, they were so far away.
"The noise made me look up. I looked up at the sky and saw it all happening."
The noise was also heard by Carolyn Humphreys from Goathland.
She said: "There was this boom. I thought my chimney had fallen off but it hadn't.
"It had been heard at the other end of the village too.It's the talk of the village."
No-one from RAF Fylingdales was available for comment.
* Did you hear the noise?
You can add your comments to this story or email the editor at: email@example.com