brucie
I believe the year was 1968.

Harpgirl, the 500mph speed is in the deep ocean. At shore it is no more than 50mph. The video I have seen from atop a 20 story hotel showing the 30 foot wave rush ashore over samller buildings a mere 100 yards was amazing.

...........................................

Now imagine a 5 km asteroid hitting the mid Atlantic.

The resulting wave would be about one mile tall in many shoreline locations.

My friends, that is the differnece between a catastrophe and a catacysm.