Big quake by UK standards. I live in Morriston in Swansea Valley and the quake sounded like an explosion deep in the ground which caused my book case to visibly wobble! Cat slept on mind!??
Places will possibly be affected by this event, especially Cwmystwyth and possibly Silica Mines at Glynneath, so take extra care when exploring Welsh mines. The last big quake to hit southern Wales in the late 80s, brought down a very large part of bedding at the portal of St. David’s Sump in Daren Cilau!