Earthquake catalogue of all known UK events until 1969. The catalogue covers the offshore areas as well as mainland UK, covering an area between 10 degrees West to 4 degrees East and 49 degrees to 62 degrees North. This includes all of Ireland and some earthquakes in northern France that were also felt in the UK. Earthquakes outside this area are also included if they were felt in the UK. The historical catalogue has been compiled, in general, from macroseismic observations (ie felt effects). Before 1700, only earthquakes with magnitudes of 4.0 ML or greater are included. After 1700, all known events with magnitudes of 3.0 ML or greater are included together with some other, smaller ones. Accuracies of magnitude, location, and origin time vary with the quality of information available.