An earthquake of magnitude of 3.1 shook west of Scotland in the early hours of Tuesday morning.
The quake happened just before 2:00am local time.
Its epicenter was about 11 miles north west of Lochgilphead and 88 miles north west of Glasgow, according to the United States Geological Survey.
More than 30 people reported the tremor, from as far away as Edinburgh and Ballycastle in Northern Ireland.
The agency said the quake happened six miles below the Earth’s surface.
Data from the British Geological Survey shows that between 200 and 300 earthquakes are detected in the UK every year, with tremors of between 3.0 and 3.9 magnitude happening on the mainland once every three years on average.