Where were the 2 largest earthquakes ever?
The largest earthquakes ever was the Valdivia earthquake in Chile in 1960 with a magnitude of 9.5. The second largest was the Alaska earthquake in 1964 with a magnitude of 9.2.
Just about everywhere on Earth can have earthquakes. Some locations are more known for it than others, but it turns out that one of the largest earthquakes ever in the United States was in Missouri, a location not particularly noted for being earthquake-prone. Anywhere there's a fault, there can be earthquakes. The recent (November 2011) Oklahoma quakes occurred along the Wilzetta fault.