Magnitude 4.1 , epicentre midway between Gower and Devon, 13:21 GMT 20 Feb 2014.
http://www.bbc.co.uk/news/uk-england-26277432
I distinctly felt it in Swansea - building noticably shook for three or four seconds and there was a grinding noise.
http://www.earthquakes.bgs.ac.uk/earthquakes/recent_events/20140220132017.html#page=summary - general data
http://www.earthquakes.bgs.ac.uk/earthquakes/recent_events/20140220132017.html#page=additional - accurate map of epicentre and seismic graph
May possibly have affected some west Wales caves?
http://www.bbc.co.uk/news/uk-england-26277432
I distinctly felt it in Swansea - building noticably shook for three or four seconds and there was a grinding noise.
http://www.earthquakes.bgs.ac.uk/earthquakes/recent_events/20140220132017.html#page=summary - general data
http://www.earthquakes.bgs.ac.uk/earthquakes/recent_events/20140220132017.html#page=additional - accurate map of epicentre and seismic graph
May possibly have affected some west Wales caves?