Earthquakes have been ruled out as a cause of the mystery bangs and rumblings which were heard from Glasgow to London on Saturday night.
People, including residents of Leicestershire, reported hearing a series of loud noises between 9pm and 10.30pm.
The bangs were so powerful it rattled windows in some areas and spooked pets in others.
Yesterday the Keyworth-based British Geological Survey confirmed: "There was no seismic activity in the country which could have been responsible for the noises."
Social media sites were bombarded with explanations ranging from sonic booms from Stealth bombers to space debris crashing into the atmosphere.
The Ministry of Defence also ruled out sonic booms from RAF Typhoon interceptors.
One Wigston resident said: "I thought it was some idiot letting off powerful fireworks. It was foggy but I did see a big flash."
A resident from Western Park added: "At first I thought it was fireworks but I am not so sure now."
However, nobody complained to Leicestershire Police or contacted the fire service about the noises."
But readers have contacted the Mercury.
firegews wrote: "We heard them as well in Shenton, I opened the window but could not pinpoint any direction. I thought they were more like deep explosions than fireworks?
Elaine1971 wrote: "We heard the bangs when we were camping at Bosworth Water Park last night. It was more like a barrages, than individual bangs. Maybe it was meteorites...?"
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