On the varied impact of the Storegga tsunami in northwest Scotland

In this paper we evaluate new data and those from previous studies in northwest Scotland perform a modelling study to test the hypothesis that Storegga tsunami (submarine slope failure off continental shelf of Central Norway dated 8120–8175 bp) impacted region. The model used is 2D non-linear, non-conservative, Shallow Water Equation solver incorporating inundation realistic glacial isostatic adjustment-corrected palaeobathymetry, with horizontal resolution down 30 m at sites interest. 15 coastal analysed range south Isle Skye Assynt. We predict run-up between 2.7 9.4 above contemporaneous mean tide level across region, highest on west coast Outer Hebrides, east head long sea lochs Skye. re-evaluate evidence previously studied open marshes, isolation basins barrier locations for suggest many most likely cause erosion, deposition changes microfossil assemblages early Holocene. predictions wave height produced by fit well available field significant heights least as far Mull coast.