Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Woodbridge, CT
No earthquake was likely felt in Woodbridge in the 24 hours to 9:06 pm EST (02:06 UTC). The last one was M 3.8, 277 km (172 mi) NE, at 10:22 am EST on 27 January 2025, estimated intensity II (weak) in town; 42,440 felt reports to USGS. Every earthquake near Woodbridge
This page: a magnitude 1.5 earthquake was recorded 2 km (1 mi) south of Woodbridge, CT, at 6:06 am EST on 27 February 2018 (11:06 UTC), 11 km deep.
USGS: 2 km S of Woodbridge, Connecticut
8 km (5 mi) WNW of New Haven, CT · 108 km (67 mi) NE of New York, NY
- When
- 6:06 am EST on 27 February 2018 ()
- Where
- 2 km (1 mi) south of Woodbridge, CT · earthquakes near Woodbridge
- Magnitude
- M 1.5 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- South Central Connecticut Planning Region, 15 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3092 days ago
Earthquake alerts for Woodbridge, CT
Get a notification in this browser when USGS records an earthquake near Woodbridge, CT. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Woodbridge, 2 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Ansonia, Orange, Derby, Shelton, New Haven, Seymour.
How big was it?
This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 41.3348, -73.0121. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| South Central Connecticut Planning Region, CT | 15 km (10 mi) | ESE | earthquakes near South Central Connecticut Planning Region |
| Naugatuck Valley Planning Region, CT | 21 km (13 mi) | NNW | earthquakes near Naugatuck Valley Planning Region |
| Greater Bridgeport Planning Region, CT | 23 km (15 mi) | SW | earthquakes near Greater Bridgeport Planning Region |
| Western Connecticut Planning Region, CT | 37 km (23 mi) | W | earthquakes near Western Connecticut Planning Region |
| Lower Connecticut River Valley Planning Region, CT | 44 km (28 mi) | ENE | earthquakes near Lower Connecticut River Valley Planning Region |
| Suffolk County, NY | 51 km (32 mi) | SSE | earthquakes near Suffolk County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 2.0 3 km E of Plainville, Connecticut
- 1.5 3 km NNW of Killingworth, Connecticut
- 1.6 2 km ENE of Newington, Connecticut
- 1.9 3 km SW of West Hartford, Connecticut
- 1.9 3 km ENE of Durham, Connecticut
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.