It approximates to the northern extremity of the Pontesford-Linley geological fault , which trends approximately 11 miles to Linley near Bishops Castle . On 2 April 1990 , the Pontesford-Linley Fault - registered an earthquake with a magnitude of 5.1 on the Richter scale , known as the Bishop 's Castle earthquake . Coal was mined there in the 19th century
Bishop 's Castle earthquake
1990 Bishop's Castle earthquake
Pontesford