1960 Valdivia earthquake
The 1960 Valdivia earthquake () or Great Chilean earthquake ("Gran terremoto de Chile") of 22 May is the most powerful earthquake ever recorded. Various studies have placed it at 9.4–9.6 on the moment magnitude scale. It occurred in the afternoon (19:11 GMT, 15:11 local time), and lasted approximately 10 minutes. The resulting tsunami affected southern Chile, Hawaii, Japan, the Philippines, eastern New Zealand, southeast Australia and the Aleutian Islands.
1929 Grand Banks earthquake
The tsunami waves had an amplitude of , and a runup of along the Burin Peninsula. It destroyed many south coastal communities on the Peninsula, killing 27 or 28 people and leaving 1,000 or more homeless. All means of communication were cut off by the destruction, and relief efforts were further hampered by a blizzard that struck the day after. It was recorded as far away as Lagos, Portugal away, 06:47 after the earthquake.It took 02:23 hrs to strike Burin, Newfoundland, from the epicenter, and only two hours to be observed in Bermuda . This was Canada's largest submarine landslide ever recorded, up to 500 times the size of 1894 Saint-Alban landslide.