An Ulster coastguard today described how he experienced first hand the effects of an earthquake that shook England.
Experts have confirmed that the tremor, which measured at 5.3 on the Richter scale, is the strongest to hit the UK in more than 25 years.
As yet, only one earthquake-related injury has been reported - a man in south Yorkshire was taken to hospital when a chimney collapsed.
Duty watch manager at Bangor coastguard station, John Hope, was at work when he felt the aftershock of the quake at around 1am.
"I can only liken it to somebody as being a load of people up in your roof space - moving about and you hear the creaking of the ceiling," he said.
"It was quite a tremendous creaking - the whole ceiling was actually creaking. It was to such a degree that I looked up and I said to my operator: 'Do you hear that'? She was meanwhile sitting there coming to terms with the fact that her chair was vibrating."
The British Geological Survey (BGS) said the earthquake was of the magnitude of 5.3 and the epicentre was near Market Rasen in Lincolnshire.
The main 10-second quake, which struck at 12.56am at a depth of 15.4km (9.6 miles), was the biggest recorded example since one with a magnitude of 5.4 struck north Wales in 1984.