Experts are trying to determine what caused earth tremors and buildings to shake in Berwick and coastal areas of the Scottish Borders this afternoon.

Scientists can't say if it was an earthquake and the RAF said the RAF says none of their planes caused a sonic boom.

Seismologists are currently looking into the 3.15pm incident in Berwickshire and Northumberland.

A British Geological Survey spokeswoman said: "We know something happened as we've had lots of reports of the earth shaking and it registered on our equipment."

The data is being studied but the spokeswoman said they could not confirm if it was an earthquake or a sonic boom. But she said the data did not have the 'tell-tale' signs of an earthquake.

A Northumbria Police spokesman said that reports had come in from as far afield as south as Craster and that Lothian and Borders Police had received reports from Burnmouth.

He said that the RAF had reported that although planes were operating in the area it was not believed to be a sonic boom.

It has also been felt in Wooler and Belford as well as throughout Berwick.