1984 Llŷn Peninsula earthquake

Earthquake
title = 1984 Llŷn Peninsula earthquake
date= July 19 1984


magnitude = 5.4 M_L
depth=convert|20.7|km|mi|0
location=coord|52.96|N|4.38|W
intensity = 6 EMS - Slightly damaging
countries affected = UKThe 1984 Llŷn Peninsula earthquake struck the Llŷn Peninsula in Gwynedd, north-west Wales 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 UK since instrumental measurements began. citeweb|url=http://www.earthquakes.bgs.ac.uk/earthquakes/education/faqs/faq9.html|title=BGS FAQ What are the largest two instrumental, onshore earthquakes? |publisher=BGS] citeweb|url=http://www.earthquakes.bgs.ac.uk/earthquakes/historical/historical_listing.htm#19841907|title=19 July 1984 Lleyn Peninsula |publisher=BGS]

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 Wales and England, the biggest concentration of damage being in Liverpool, which is located around 75 miles north-east of the epicentre. Minor injuries were also reported in the areas surrounding the epicentral area, and rockslides occurred at Tremadog in Gwynedd. citeweb|url=http://earthquake.usgs.gov/eqcenter/eqarchives/significant/sig_1984.php|title=USGS Significant earthquakes of the world 1984 |publisher=USGS]

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. citeweb|url=http://www.earthquakes.bgs.ac.uk/macroseismics/manchester_earthquake_sequence.htm|title=Manchester Earthquake Sequence report (Mentions this event) |publisher=BGS]

References

External links

* [http://www.earthquakes.bgs.ac.uk/macroseismics/lleynpeninsula_macro.htm Details and Intensity map from BGS]
* [http://www.earthquakes.bgs.ac.uk/earthquakes/historical/historical_listing.htm List of historical UK earthquakes]