Storegga Slide

The three Storegga Slides (Norwegian: Storeggaraset) are amongst the largest known submarine landslides. They occurred at the edge of Norway's continental shelf in the Norwegian Sea, approximately 6225–6170 BCE. The collapse involved an estimated 290 km (180 mi) length of coastal shelf, with a total volume of 3,500 km (840 cu mi) of debris, which caused a paleotsunami in the North Atlantic Ocean.