It was later suggested that a landslide in the Canary islands had caused a mega tsunami that travelled the atlantic and flattened the east coast. There was a report by a Norwegian fisherman who survived a tsunami that a landslide caused a huge wave to be created, which picked up him and his boat and dumped him some 500m up the hill.
I also read that they expect a possible landslide to occur in the Hawaiian islands. It is calculated that the generated mega tsunami would really do some damage to the west coast of the US!

Run boy run.....