June 7, 1931 Earthquake: Scarborough, Grimsby, United Kingdom

This is the largest known earthquake in the North Sea region and had its epicentre in the Dogger Bank area in the open North Sea. Felt throughout the UK, Belgium, the Netherlands, northern France and Germany, southwestern Norway and Denmark. The earthquake damaged buildings in a coastal belt of the eastern UK, circa 30 km in width between Scarborough and Grimsby. The water level in 4 wells in this area were also subject to rapid change. People in boats passing over the epicentral zone reported sounds of a subsea explosion and they also noticed the development of a heavy, confused sea swell that developed in a calm sea bump which subsided relatively rapidly (Ringdal, ref #10918). No tsunami has been reported on the coast. (reference #4139)