Double sonic booms heard over secretive military base Area 51 has sparked claims the CIA is hiding alien technology at the top secret site.
Footage has surfaced of two loud thumping sounds as a pair of F-22 fighter jets fly over the secretive base.
Conspiracy theorists claim the sonic booms show the CIA is secretly testing alien technology or hypersonic aircraft.
A double sonic boom heard over Area 51 has sparked claims the CIA is ‘hiding alien proof’ at the top secret site. Footage has surfaced of two loud thumping sounds as a pair of F-22 fighter jets fly over the secretive base
A clip posted to YouTube by UFO Seekers, taken in the Nevada desert near where Area 51 is based, shows the F-22 craft cut across the sky at speeds of up to 1,500 mph (2,400 kph).
As one jet speeds away, leaving a distinctive vapour trail in its wake, two sonic booms are heard.
The loud cracking sounds are caused by shock waves produced when aircraft travel faster than the speed of sound.
Some users reported seeing a burst of flames burst from the plane’s engines.
YouTube commentators claimed the flybys were a cover-up for work on extra-terrestrials within the base.
User Good Citizen wrote: ‘They have to be testing cloaking ufos. Sonic bombs dont just happen for no reason.’
User Matt Smith commented: ‘I think the regular fighter jets, F22’s etc, were there as a distraction, to cover for the real testing of experimental hypersonic aircraft.
‘The burst of flame you captured is possible evidence of some type of Scram/Ram Jet type technology, maybe the cause of the double sonic boom?’
User 21 Savage wrote: ‘Still waiting for the day for NASA and the whole world to officially tell us that extraterrestrial aliens have been living with us this whole time and that they are real.’
Area 51 is a US Air Force Base around 80 miles (130 km) from Las Vegas, and is thought to be used in the development and testing of experimental military aircraft.
The US government only admitted Area 51 exists in 2013 after a Freedom of Information request. Pictured is a warning sign out the base
Conspiracy theorists have claimed the sonic booms indicate the CIA is secretly testing alien or military hypersonic technology. Area 51 is a US Air Force Base around 80 miles (130 km) from Las Vegas
Famous machines developed there include the U-2 spy plane, SR-71 Blackbird, and the F-117A Nighthawk stealth fighter
The US government only admitted the base exists in 2013 after a Freedom of Information request.
The facility had been used during World War Two as an aerial gunnery for Army Air Corp pilots.
Famous machines developed there include the U-2 spy plane, SR-71 Blackbird, and the F-117A Nighthawk stealth fighter.
Many conspiracy theorists claim the base has been used to research an alleged crashed alien spacecraft at Roswell, New Mexico, in 1947. Pictured is an SR-71 blackbird held upside down during testing at Area 51
Images of the base are extremely rare, with any photographers brave enough to travel there kept far back from the perimeter by the base’s many armed guards. Area 51 is blanketed by a strict 23 by 25-mile (37 by 40km) no-fly zone for civilian aircraft
Many conspiracy theorists claim the base has been used to research an alleged crashed alien spacecraft at Roswell, New Mexico, in 1947.
Images of the base are extremely rare, with any photographers brave enough to travel there kept far back from the perimeter by the base’s many armed guards.
Area 51 is blanketed by a strict 23 by 25-mile (37 by 40km) no-fly zone for civilian aircraft.
MYSTERIOUS BOOMS AROUND THE WORLD IN 2017
In 2017 alone, 64 booms have been heard worldwide.
The cause of most of the booms remains a mystery, although several explanations have been suggested.
1) Sonic booms
A sonic boom is the sound associated with the shock waves created by an object traveling through the air faster than the speed of sound – such as supersonic aircrafts.
Sonic booms generate significant amounts of sound energy, sounding like an explosion to the human ear.
2) Military exercises
Many unexplained loud noises can be put down to military training, either at Army or Naval bases or in remote areas used for such exercises.
Mysterious booms have been reported 64 times this year, in locations including Michigan, Lapland, St Ives, Swansea and Yorkshire. Incidents are becoming more frequent according to some reports
3) Controlled explosions
A controlled explosion is a method for detonating or disabling a suspected explosive device, such as bags left at train stations.
4) Unusual weather
Many loud noises link back to unusual weather events, such as electrical storms or thunder storms.
5) Meteors
Large meteors passing above Earth often produce shock waves that can be heard as a sonic boom.
6) Sound amplified from aircraft
Some have suggested that the sound was due to inversion – a phenomenon that occurs when a layer of warm air sits over a layer of cooler air, magnifying the sound of an aircraft miles away.
7) Aliens
Some conspiracy theorists claim that the mysterious booms are noises created by aliens – although there is no evidence to support this.