Claim: The earthquake of April 15, 1185 at the sixth hour of the day in the region of East Midlands, estimated at around five Mw magnitude, was one of the largest and most damaging earthquakes the British Isles had ever encountered.
Evidence: The earthquake of 15 April 1185 in the region of East Midlands was one of the largest and most damaging earthquakes the British Isles had ever encountered. 6th hour of the day Some think the epicentre of the earthquake was close to Nottingham in East Midlands. The magnitude has been estimated at around 5 Mw.