QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Hebron, CT

No earthquake was likely felt in Hebron in the 24 hours to 4:33 am EST (09:33 UTC). The last one was M 2.2, 20 km (13 mi) SSW, at 8:21 am EDT on 15 March 2026, estimated intensity II (weak) in town; 99 felt reports to USGS. Every earthquake near Hebron

This page: a magnitude 1.6 earthquake was recorded in Hebron, CT, at 1:31 am EST on 2 February 2017 (06:31 UTC), 7.8 km deep.

USGS: 1 km NNW of Hebron, Connecticut

28 km (17 mi) ESE of Hartford, CT · 134 km (83 mi) WSW of Boston, MA

1:31 am EST, Feb 2, 2017 · · 7.8 km deep · released about 7.6 lb of TNT

Every earthquake near Hebron Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Capitol Planning Region 23 kmLower Connecticut River Valley Planning Region 30 kmSoutheastern Connecticut Planning Region 31 kmNortheastern Connecticut Planning Region 38 kmHampden County 56 kmSouth Central Connecticut Planning Region 57 kmNaugatuck Valley Planning Region 62 kmKent County 66 kmProvidence County 69 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
1:31 am EST on 2 February 2017 ()
Where
in Hebron, CT · earthquakes near Hebron
Magnitude
M 1.6 (ml)
Depth
7.8 km below the surface
Felt
no reports yet
Nearest
Capitol Planning Region, 23 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3486 days ago

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. 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: Terramuggus, Colchester, Coventry Lake, South Coventry, Lake Pocotopaug, Willimantic.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 41.6726, -72.3726. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Capitol Planning Region, CT 23 km (14 mi) NW earthquakes near Capitol Planning Region
Lower Connecticut River Valley Planning Region, CT 30 km (19 mi) SSW earthquakes near Lower Connecticut River Valley Planning Region
Southeastern Connecticut Planning Region, CT 31 km (19 mi) SE earthquakes near Southeastern Connecticut Planning Region
Northeastern Connecticut Planning Region, CT 38 km (24 mi) ENE earthquakes near Northeastern Connecticut Planning Region
Hampden County, MA 56 km (35 mi) NNW earthquakes near Hampden County
South Central Connecticut Planning Region, CT 57 km (36 mi) SW earthquakes near South Central Connecticut Planning Region

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

20 earthquakes have been recorded within 50 km since this one.

  1. 1.6 6 km SW of Niantic, Connecticut
  2. 1.5 2 km SSW of Deep River Center, Connecticut
  3. 1.9 2 km NNE of East Haddam, Connecticut
  4. 2.2 1 km S of Moodus, Connecticut
  5. 1.8 2 km W of Conning Towers-Nautilus Park, Connecticut
  6. 1.9 2 km N of East Haddam, Connecticut
  7. 2.0 3 km E of Plainville, Connecticut
  8. 1.8 1 km NNW of Essex Village, Connecticut
  9. 1.5 3 km NNW of Killingworth, Connecticut
  10. 1.6 2 km ENE of Newington, Connecticut
  11. 1.8 2 km SSW of Moodus, Connecticut
  12. 2.2 1 km NNE of Moodus, Connecticut
  13. 1.8 2 km ESE of Ledyard, Connecticut
  14. 1.6 0 km SSW of Old Mystic, Connecticut
  15. 2.0 1 km S of Old Mystic, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.