United States
Earthquakes in Connecticut
ShareUSGS recorded 1 earthquakes in and around Connecticut in the last 30 days and 8 in the last year, counting everything of magnitude 1.0 and above. The strongest in that year measured M 2.2.
- Depth
- When (UTC)
- Local time
- Coordinates
Recent earthquakes in and around Connecticut
Last 30 days, newest first as of 2026-08-10 17:03 UTC
| Magnitude | Location | Depth | When (UTC) |
|---|---|---|---|
| M 1.3 | 5 km NW of Killingworth, Connecticut | 6.8 km deep | 2026-07-12 09:15 UTC |
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 2026-08-10. Public domain.