Scotland has been hit by second earthquake in less than a week after the Highlands was hit by a 2,.2 magnitude tremor sparking a 'big bang'
The British Geological Survey reported a 2.2 magnitude earthquake registering on seismometers at 9.29pm.
The organisation said Friday's quake had a depth of 7.5km and happened near Spean Bridge in the Highlands.
"A small number of reports have been received by members of the public in the Roybridge area indicating they felt this event," a spokesman from the survey said on Twitter.
Friday's quake was the latest night-time tremor to hit the country.
People in the area reported "big banging" noise.
One nearby resident wrote: "Another earthquake in Roybridge???"
Another said: "I just heard a big banging in Spean, I thought it was someone’s bins or something."
Other Twitter users were keen to know their friends and loved ones were ok.
'Nancy Highlands' wrote: "Everything okay ? I know that was a small quake, but ..."
The Mirror reported a quake earlier in the week in the Lochgilphead, Arglly and Bute an hour after an earlier tremor was reported on Tuesday morning,.
The first 3.3 magnitude quake happened at at 1.44am.
Locals compared the noise to an explosion, with one person saying it felt 'like a freight train'.
Less than an hour later - at 2.42am - a second 1.6 magnitude tremor was recorded at a depth of 7km in the village of Roybridge in the Highlands.
The British Geological Survey said the first quake was felt by more than 30 people at Achnamara, Tayvallich, Lochgilphead, Tarbert, Ardrishaig and many other villages and hamlets the region.
Some residents said they were awoken by a 'loud bang', while others said 'the house and windows shook' and 'it was like rolling thunder', said the BGS.
The 3.1 magnitude earthquake was reported by the United States Geological Survey (USGS) on Tuesday just before 2am
Its epicentre was some 11 miles north-west of the town of Lochgilphead, 88 miles north-west of Glasgow.
More than 30 people reported to the USGS that they had felt the tremor, with reports coming from as far as Edinburgh and Ballycastle in Northern Ireland.
The agency said that quake happened 10km below the Earth's surface.
Data from the British Geological Survey shows between 200 and 300 earthquakes are detected in the UK every year, with tremors of between 3.0 and 3.9 magnitude occurring on the mainland once every three years on average.
