[Question_Assumptions]

You can find a less spectacular but still troubling analysis of the possible waves that could hit the US coast here.

[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...