Storegga Slide

[3][4] In Scotland, traces of the subsequent tsunami have been recorded, with deposited sediment being discovered in Montrose Basin and the Firth of Forth up to 29 km (18 mi) inland and 4 m (13 ft) above current normal tide levels.

In this case, a trigger such as an earthquake could have caused a large area of seafloor to collapse into the deep Norwegian sea, thus carrying the enormous volume of accumulated sediment along with it.

[7] At, or shortly before, the time of the Second Storegga Slide, a land bridge known to archaeologists and geologists as Doggerland linked Britain, Denmark and the Netherlands across what is now the southern North Sea.

This area is believed to have included a coastline of lagoons, marshes, mudflats and beaches, and to have been a rich hunting, fowling and fishing ground populated by Mesolithic human cultures.

With present-day populations and sea levels, a similar event today could devastate and destroy seafront and port areas of Arbroath, Stonehaven, Aberdeen, Inverness, Wick, and Montrose.

Map of Storegga Slides
The yellow numbers give the height of the tsunami wave as indicated by tsunamites studied by researchers. [ 1 ]
Storegga tsunami deposits (grey upper layer), bracketed by peat (dark brown layers), taken at Maryton on the Montrose Basin, Scotland