1984 Lleyn Peninsula earthquake

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1984 Lleyn Peninsula earthquake
Date July 19, 1984
Magnitude 5.4 ML
Depth: 20.7 kilometres (13 mi)
Epicenter location: 52.96° N 4.38° W
Countries/
regions affected		 Flag of the United Kingdom United Kingdom
Max. Intensity: 6 EMS - Slightly damaging

The 1984 Lleyn Peninsula earthquake struck the Lleyn Peninsula in North Wales, United Kingdom on July 19, 1984 at 0656 UTC (0756 local time). It measured 5.4 on the Richter scale, and is the largest known onshore earthquake to occur in the United Kingdom since instrumental measurements began. [1] [2]

The effects were felt throughout Wales, most of England and parts of Ireland and Scotland. There were many reports of minor damage to chimneys and masonry throughout England and Wales, the biggest concentration of damage being in Liverpool, which is located around 75 miles North East of the epicentre.[2] Minor injuries were also reported in the areas surrounding the epicentral area, and rockslides occurred at Tremadog in Gwynedd. [3]

It was followed by many aftershocks in the following months, the largest measuring 4.3 on the Richter scale, which itself was felt as far away as Dublin, in Ireland. [4]

[edit] References

  1. ^ BGS FAQ What are the largest two instrumental, onshore earthquakes?. BGS.
  2. ^ a b 19 July 1984 Lleyn Peninsula. BGS.
  3. ^ USGS Significant earthquakes of the world 1984. USGS.
  4. ^ Manchester Earthquake Sequence report (Mentions this event). BGS.

[edit] External links

Coordinates: 52.96° N 4.38° W