According to the Daily Mail, conspiracy theorists are attributing,
The booms to a spy plane rumored to be under development by the US military, under the codename Aurora....People described it as loud enough to shake their homes and rattle windows. This has led conspiracy theorists to claim the power source could be behind a hypersonic US spy plane, dubbed Aurora. Aurora is rumored to be an ultra top secret aircraft that has been in development since 1989.
Enthusiasts claim that such a supersonic or hypersonic plans could be what caused the strange noises at the weekend. In particular, an expert said the sound is similar to that created by pulse detonation engines. An artist's illustration of what the Aurora plane could look like is pictured.
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