[mvpel]

This document puts the "300m" claim to bed.

The images on page 3 indicate tsunamis of 10-25 meters in height above MSL on the US coast. That's still pretty hard-core surf, though.

Wonder what it would do to the North Atlantic conveyor...

[mvpel]

Rather, the 100m/300ft. Waves of that size would be limited to Africa.

[Question_Assumptions]

I talks about the east coast waves going about 12 miles inland -- I assume they could travel further up rivers, though. That would be a disaster but it's not going to wipe out all life East of the Mississippi.