Where on this map is the fracture zone that might develop into a landslide? There was a TV episode some years ago (I think CSI Miami) in which a 20 foot tsunami hit the city. Is that the height tsunami which is officially predicted for a serious landslide? I am probably going to be in Chincoteague, VA soon for a week. Any idea of how high a tsunami might be predicted for that location. I guess it is farther away than FL so might have a lower wave height. How long would it take for the tsunami to cross the Atlantic?Also, unlike Ocean City, MD, Chincoteague is behind Assteague Island which would blunt the impact. Nevertheless the place where I will be is probably only 4 feet above mean high water. If the landslide happened on the east side of the island would that reduce the impact on US shores?
Regarding Krakatoa, its explosion caused a wave at least 150 ft. high which rushed up a nearby bay. Two thousand feet is ridiculous, but a big asteroid in the Atlantic could cause such a wave. Apparently, the Krakatoa eruption did cause several feet of ocean rise around the world. The story is that Salt Water taffy in Atlantic City was caused by this flooding of the candy store/factory.
Well, there was salt water taffy in AC when I was a kid in the 40s and, since AC is on the East Coast, there is no way anything like a wave from Krakatoa in the Southern Pacific would get to the Atlantic coast. Krakatoa had a VEI (Volcanic Explosivity Index) of 6 ; St Helens was a VEI of 5 ; Tambora had a VEI of 7. And no, the worldwide effect was minimal, since it was a relatively small eruption. Bad Internet Story. https://www.history.com/topics/natural-disasters-and-environment/krakatoa
Any flooding would have been due to one of the numerous hurricanes that hit the Atlantic seaboard in the 30s and 40s, one of which took most of the Boardwalk and many houses out to sea - I have some pictures of that my uncle took.
##
The wave itself would be like the Latuya Bay one, created by displacement rather than subsidence.
Subsidence creates a wave from the bottom up, raising the sea by the distance of the up or down thrust and strength of the quake. That wave travels across top of the sea as a low ripple until it hits shallower water and then it pushes up into the familiar huge wave, traveling only as far as the remaining energy and land height allow. (May not be entirely accurate but close).
A displacement of a large volume of water pushes the wave up from the bottom and above the former level of the water, rising as high as the water that was displaced. The wave will travel many hundreds of MPH, taking a few hours to reach the East coast. It will lose some of the energy and height as it disperses across the body of water.
However, reaching shallows, it will rebuild and continue until inland until it hits a land height equal to its own. If it is 10 feet above sea level in will go until it hits land 10 feet above ; if its 100 feet high on reaching the shore, then it will need to hit land 100 feet above sea level. The wave in question will de[pend on the volume that is actually displaced - one estimate I saw said it could reach 300-600 feet in height ; in which case head for the mountains. NOAA used to have a video of these sorts of wave created in their wave tank. Most of the height will be directly across from the island, while Fla will have a shorter one ; since FLA is mostly flat then ... (May not be entirely accurate but close).
The crack is on the west side, running for several miles.