Claim: The earthquake of May 15, 1185 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 magnitude has been estimated at around 5 Mw. 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. The 1185 East Midlands earthquake happened in England.