Since 1952, there are six earthquakes similarly sized or larger than the 9.0 earthquake that hit Japan:
- 9.0 2011 East coast of Honshu, Japan
- 9.1 2004 West Coast of Northern Sumatra
- 9.0 1952 Kamchatka earthquake,
- 9.1 1957 Andreanof Islands, Alaska
- 9.5 1960 Chile earthquake
- 9.2 1964 Prince William Sound, Alaska
All of these earthquakes were mega-thrust events, occurring where one tectonic plate subducts beneath another. All produced destructive tsunamis.