A third earthquake struck Scotland today in a series of rumbles, which took place just a few hours apart.
The quake with a strength of 0.9 was recorded at Roybridge in the highlands at. 4.09 this morning about an hour and a half after a shaking of 1.6 in the same village.
Both occurred at a depth of 7 km, according to the British Geological Survey.
The first Roybridge earthquake came almost an hour after people in the west of Scotland were shaken and agitated by an earthquake measuring 3.3.
Its epicenter was about 11 miles (18 km) northwest of Lochgilphead in Argyll and Bute and 88 miles (142 km) northwest of Glasgow.
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The British Geological Survey said it was marked by more than 40 people living in villages and hamlets across the region – mainly from about 24.8 miles from the epicenter.
BGS listed reports such as “we felt and heard a loud, deep rumble”, “the loud bang woke us up”, “sounded like an explosion”, “the house and the windows were shaking” and “it was like a rolling thunder”.
Rosemary Neagle, who lives on a farm in Kilmartin Glen near Lochgilphead, said the noise from the quake was so loud that she initially thought something had exploded in one of her sheds.
She told BBC Radio’s Good Morning Scotland program: “It kept intensifying and the house vibrated. It rumbled on for about 10 seconds afterwards, so it was pretty scary.
“I’ve experienced them before here, but never to that extent. The house has never shaken like that before.”
Some Scottish football fans have rudely claimed that the earthquake may have been caused by events in Hampden Park, where the men’s national football team beat Denmark 2-0.
Stephen Fenwick tweeted: “Earthquake in western Scotland? Probably earthquake caused by hundreds of thousands of glassblowers celebrating Scotland’s historic 2-0 victory over Denmark last night.”
The overnight earthquake was recorded on all seismographs across Ireland.
Dr. Martin M llhoff, director of Seismic Networks in Dublin at the Dublin Institute for Advanced Studies, said it was the first tagged earthquake to have occurred anywhere in Ireland since one was detected near the Irish border in County Donegal in 2019.
“It’s a little bit exciting because it does not happen that often and most people think there are no earthquakes in Ireland,” he said.
By comparison, the largest known Scottish earthquake occurred near Loch Awe in 1880, with a magnitude of 5.2.
There are around 200-300 earthquakes in the UK each year, but the vast majority are so small that no one notices them.
But between 20-30 is over 2.0 magnitude, which can be felt over a wider range.
Earthquakes in Scotland are most often attributed to glacial rebound. Until about 10,500 years ago, much of northern Britain was covered by a thick layer of ice – which pushed the rocks into the underlying mantle.
These rocks have been slowly rising again since the ice melted, causing occasional earthquakes in the process.
Britain is also exposed to tectonic loads caused by the expansion of the Atlantic Ocean, which is slowly pushing the whole of Eurasia to the east, and from the northern movement of Africa, which is pushing into Europe from the south.
The most damaging earthquake in Britain was in the Colchester area in 1884. About 1,200 buildings needed repairs, chimneys collapsed, and walls were cracked.