A 1974 “UFO incident” which was dubbed the Welsh Roswell was dismissed as an earthquake and a meteor combining, offical files show.
There was a huge bang and a brilliant light over the Berwyn Mountains in north east Wales, and there were later claims a spaceship crash was concealed.
Comparisons were drawn with Roswell, New Mexico, USA, in 1947, where it is claimed an alien crash was concealed.
But a Ministry of Defence (MoD) investigation said there was no UFO.
The National Archives files show it was explained by a noisy earth tremor coinciding with a meteor burning up in the atmosphere.
A search and rescue team was scrambled from RAF Valley on Anglesey ... Read even more
