1421 A seawall at the Zuiderzee dike in the Netherlands breaks, flooding 72 villages and killing about 10,000 people. This event is known as the Sint-Elisabethsvloed, or Saint Elizabeth’s flood. It was caused when a North Sea storm overnight caused the dike to break in a number of places.
1727 1727 Tabriz Earthquake, 77,000 people killed
1929 1929 Grand Banks earthquake: off the coast of Newfoundland in the Atlantic Ocean, a Richter magnitude of 7.2 submarine earthquake, centered on Grand Banks, breaks 12 submarine transatlantic telegraph cables and triggers a tsunami that destroys many south coast communities in the Burin Peninsula.