Sunday 26 January 2020

Ireland’s Earthquake explained

Area affected by the quake. Photo: British Geological Survey
Area affected by the quake. Photo: British Geological Survey
Seismogram of the quake. Photo: Geological Survey of Ireland

Brian O'Reilly

MANY slept through it, however thousands of people on the east coast felt tremors from an Earthquake which struck at 4.16 this morning.

The Geological Survey of Ireland has confirmed this morning that the epicentre of the 3.8 magnitude quake was in the Irish sea, 10 miles off the Welsh coast.

It also confirmed that the quake’s tremors were felt over a 90 mile radius, affected parts of Ireland, Wales, England and the Isle of Man.

There was one aftershock from the quake at 4.20, however it only registered a magnitude of 1.7, meaning it was barely noticeable.

The Geological Survey of Ireland said: “The earthquake was produced by movement on the Menai Straits fault system, which runs across the Irish Sea from Anglesey to South Wexford.

“This fault has had a long geological history of movement and is a locus of small earthquakes to the present day.”

The largest earthquake ever recorded in Ireland was in 1984, when an earthquake with a magnitude of 5.4 caused minor structural damage on the east coast.

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