I just finished watching a Discovery channel show on tsunamis and they mentioned my ‘favorite’ kind of tsunami: the landslide-generated tsunami, and in particular the tsunami generated by a submarine landslide. However, they didn’t mention the type of submarine landslide that I have found most intriguing: the hurricane-generated landslide which in turn generates a tsunami.
I posted about this back on my old deleted blog, but thanks to the Wayback Machine I was able to find the original entry called Underwater landslide tsunamis:
According to this article, there have been 4 landslide generated tsunamis along the east coast of the US since 1800, on 3 September 1821, 22 September 1909, 21 September 1938, and 14 September 1944. More accurately, they could be called hurricane-generated-landslide-generated tsunamis, since it appears that he reduced pressure of a large hurricane can allow compressed gas in the seabed to expand and generate a submarine landslide. The landslide, in turn, generates a tsunami that seems to go with the hurricane but doesn’t act like a storm surge.
Update: Corrected the link to the paper about tsunamis on the Atlantic coast of North America