Earthquake facts from the USGS catalog

The largest US earthquake since 1900 is magnitude 9.2, in Alaska on March 27, 1964. That earthquake

Outside Alaska and Hawaii, the largest is magnitude 7.9, in California on April 18, 1906. That earthquake

40 of the 50 largest are in Alaska. The 50 largest

23 states have no earthquake of magnitude 5 or more in the catalog, including Arkansas, Connecticut and Delaware. Every state's largest

In 2015, Oklahoma had 887 earthquakes of magnitude 3 or more, and California 130. Oklahoma's record

Even Florida has 3 cataloged earthquakes, the largest magnitude 3.5. Florida's record

North Dakota has 6 cataloged earthquakes. North Dakota

The deepest with its own page here is 157 miles down, on May 1, 1990. That earthquake

1980 has the most of these notable earthquakes, with 40. 1980