Doggerland was submerged by a tsunami formed in what ocean?
Storegga Slide The three Storegga Slides are considered to be amongst the largest known landslides. They occurred under water, at the edge of Norway's continental shelf in the Norwegian Sea, approximately 6225–6170 BCE. The collapse involved an estimated 290 km length of coastal shelf, with a total volume of 3500 km3 of debris, which caused a very large tsunami in the North Atlantic Ocean.
Wieringen Wieringen (] ) is part of the new municipality of Hollands Kroon, established in 2012 in the province of North Holland in the Netherlands. It is a former municipality in this province, with its name appearing in records of the late 9th and early 10th century. From 1200 it was known as an island, also named Wieringen, which was separated by water from the mainland during one of the disastrous storm floods towards the end of the late Middle Ages that changed the coastline. By draining, dikes and landfill from 1924 to 1932, the island was rejoined to the mainland.