There are 21 earthquake incidents in Connecticut on record since 1931. The state averages less than 1 earthquake per year. The largest earthquake on record for Connecticut occurred on 10/21/1981, with a depth of 5.6 miles and a magnitude of 3.8 on the Richter scale in New Haven County, CT.
Yearly Average Number of Earthquakes in Connecticut
Total Number of Earthquakes in Connecticut since 1931