The mystery booms continue baffling people across the world.
Here some of the lastest reports from the UK, Canada and the USA.
People living in the New Tripoli area of Lehigh County want to know what caused an explosion Tuesday morning.
They say they heard or felt a blast, but authorities say they can’t determine a cause.
You can hear the booming noise in the video below (after about 30s):
“There was just a really loud boom. My house shook, my windows shook,“ Tapper said. – wfmz
2. Hamilton, Ontario, Canada
Was it a skyquake? An unexplained boom heard across Hamilton remains a mystery. Was it a supersonic jet? An industrial accident? A skyquake? Nobody seems to know what caused the boom around 2 a.m. on Saturday – heard from the beach strip all the way to Ancaster.
“I heard the boom — it was quite loud — but I also felt it. I felt my house move,” said the real estate agent, who lives in the Crown Point neighbourhood near the escarpment.
But so far, the source of the thunderous bang remains a mystery. – The Spec
Numerous people reported on social media that they heard a loud ground-shaking boom around 9 p.m. Monday night in Clemmons and western Forsyth County.
However, state and federal officials say they don’t know why it happened or what it was.
There were no reports of earthquakes anywhere Monday night in North Carolina
4. Derby city, UK
The bang was powerful enough to trigger car alarms and left houses and office blocks shaking, and instantly sparked a debate online over its cause.
This would be the reason there was a Sonic Boom in Derby… https://t.co/j3anefN6Rd— Jon from Derby 🏴🇬🇧🇪🇺 🐏#FBPE (@JonnyPrinceC) June 27, 2019
Derbyshire Police have revealed that the loud explosion heard in Derby city and the surrounding countryside area on Thursday morning was a sonic boom caused by a Royal Air Force (RAF) jet.
According to the authorities, the RAF Typhoon jet triggered the “loud bang” while moving at high speed to intercept an Air India flight from Mumbai to Newark after receiving a “security alert.” – Sputnik
What are they trying to cover-up?