United States
Earthquakes in Connecticut
ShareUSGS has not recorded an earthquake in and around Connecticut in the last 30 days. The largest ever recorded here is M 3.8, 14 km S of Madison Center, Connecticut, on 1981-10-21.
Nothing recorded in the last 30 days
USGS logged 8 events here in the last year. The historical record is below.
Recent earthquakes in and around Connecticut
USGS has not located an earthquake in and around Connecticut in the last 30 days. That is normal for this area: it recorded 8 in the last year.
The largest on record in and around Connecticut
Since 1900, when the instrumental record becomes usable. The largest is M 3.8 at 14 km S of Madison Center, Connecticut on 1981-10-21: minor: often felt, rarely causes damage.
Largest since 1900 USGS
| Magnitude | Location | Date | Depth |
|---|---|---|---|
| M 3.8 | 14 km S of Madison Center, Connecticut | 1981-10-21 | 5.6 km deep |
| M 3.3 | Housatonic Valley, Connecticut | 1908-02-05 | Not recorded |
| M 3.3 | 5 km NE of Granville, Massachusetts | 2000-06-16 | 9.8 km deep |
| M 3.3 | 0 km NE of Wauregan, Connecticut | 2015-01-12 | 5.4 km deep |
| M 3.1 | 3 km N of East Haven, Connecticut | 1980-10-24 | 0.0 km deep |
| M 3.0 | 4 km ENE of New Haven, Connecticut | 1980-10-25 | 0.0 km deep |
| M 3.0 | 3 km WNW of Stamford, Connecticut | 1991-10-28 | 10.0 km deep |
| M 3.0 | 6 km E of Moodus, Connecticut | 1982-06-17 | 2.0 km deep |
| M 3.0 | 4 km W of Pawling, New York | 1983-02-26 | 7.0 km deep |
| M 2.8 | 2 km SW of Napeague, New York | 1992-03-10 | 10.0 km deep |
How these numbers were counted
Counts include every earthquake of magnitude 1.0 and above that USGS located in and around Connecticut. The search is a latitude and longitude rectangle covering Connecticut. No region is a rectangle, so events just outside the border can appear; each row shows the location text USGS published, which names the nearest town. Full method, including why counts from different places are not comparable.
Source: USGS Earthquake Hazards Program (FDSN event service). Retrieved 2026-09-23. Public domain.