Seems to me it would depend on the size and suddenness of the landslide.
A sudden 500 cubic MILES slide would have some serious impact on the Eastern Seaboard it seems to me.
That much seems quite evident from the historic tsunami a hundred years ago or 3 from Japan all the way across the bigger Pacific to the Oregon/Pacific NW coast of the USA.
All I want to know is: will the wave be big enough to clean off #occupywallstreet?
We should send some soap for the hippy’s.