© Richard Bowden/Loop Images/Corbis
Anglesey, Wales
People on the island have reported a number of loud noises in recent days

Mystery surrounds a loud "sonic boom-like" noise heard on Anglesey in recent days. On Wednesday and Thursday afternoon, a booming sound was reported around Holyhead but there has been no official explanation.

One homeowner even said the noise was so loud that their house shook. There has been no official seismic activity recorded, and officials at RAF Valley say no aircraft have been flying which would create a sonic boom.

At 4.45pm on Thursday, Csirke Szurdok said: "Did anyone hear a very loud boom five minutes ago, and one yesterday same time Holyhead?" Another Holyhead resident said they heard two loud noises.

He said: "I was just sat in the back garden and heard two massive booms. It was loud. Birds went nuts." On Wednesday, another Anglesey resident wrote on Twitter: "Any reports of an earthquake on Anglesey? Heard and felt in Llanfechell about 30 minutes ago."

Kat Kinglsey-Hughes, who lives nearby, replied: "We heard two. The first one we heard was followed by a jet coming in off the coast."