Storegga Slide

The Storegga Slide was a massive collapse of the edge of the continental shelf off western Norway, about 100 kilometres northwest of the Møre coast. Carbon dating of plant material in the tsunami deposits places it around 6225 to 6170 BCE. Roughly 3,500 cubic kilometres of sediment slid along a 290-kilometre stretch of the shelf.

The slide generated a tsunami that crossed the North Sea. Its sand layers are found in eastern Scotland, kilometres inland, and much higher on the coasts of Shetland and Norway. It struck Doggerland, the low land between Britain and Denmark, which was already being drowned by rising seas; some estimates suggest it killed a large share of Britain's Mesolithic population, though such figures are uncertain.

The slide was studied closely before the Ormen Lange gas field was developed in the area. Researchers concluded it was set up by glacial-era sediments and is unlikely to recur without a new ice age.