Figure Captions

Figure 1

Topographic map of the North Atlantic region showing locations of a) sediment failures parallel to the slope contours b) major submarine slope failures elongated down slope and c) other slide deposits (based on data from Kenyon (1987) and Van Weering et al. (1998)). Profile A-B is described in Figure 3 caption.

Figure 2

Bathymetric map of Norwegian Sea and North Sea regions showing area of the Storegga submarine landslides (after Bugge, 1983 and Bugge et al., 1987). Dots show the principal locations where coastal deposits exist that have been attributed to deposition by the tsunami generated by the Second Storegga Slide. The graphs for sites 1, 2 and 3 are numerical model predictions of tsunami height offshore according to Harbitz (1992). Note the pronounced initial drawdown and the extreme and astonishingly rapid water-level fluctuations at the Norwegian offshore site.

Figure 3

Schematic cross-section for profile A-B (see Figure 1) showing passage of a tsunami from the deep ocean to the coast. The section shows deformation of waves with decreased water depth. Three examples are also given of the calculation of wave velocity as it varies with water depth.

Figure 4

Seismicity map for Fennoscandia covering the interval for 1497-1890 (after Ringdal et al., 1982) for this Figure, and also Figures 5 and 6, all recorded earthquakes are shown in a) greater than magnitude 3 b) greater than magnitude 4 and c) all earthquakes greater than magnitude 5.

Figure 5

Seismicity map for Fennoscandia covering the interval for 1891-1950 (after Ringdal et al., 1982).

Figure 6

Seismicity map for Fennoscandia covering the interval for 1951-1980 (after Ringdal et al., 1982).