1793 Cold Sea of Golersta earthquake.
Artists portrait of the tsunami
Some attributes
First 9.4 magnitude
Second 8 minutes 14 seconds
Third  ? on Mercalli Scale
Other attributes
Fourth unknown dead (500+ injured)
Fifth Tsunami: Yes
Sixth "Extreme" damage
On July 09, 1793, the 85 years of silent earthquake activity was shattered when this massive quake leveled coastal communities of Quextin and Ratunay bye triggering a 40+ foot tsunami that killed an unknown amount of people and injured at least 500 people.