Earthquake · reviewed by a seismologist
M 1.5ml
2 km SSW of Deep River Center, Connecticut
- When
- Magnitude
- M 1.5 (ml)
- Depth
- 5.0 km below the surface
- Felt
- 5 reports · strongest reported intensity III
- Nearest
- Lower Connecticut River Valley Planning Region, 8 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 124 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.
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.
Where
Epicentre 41.3578, -72.4484. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Lower Connecticut River Valley Planning Region, CT | 8 km (5 mi) | SSE of here | earthquakes near Lower Connecticut River Valley Planning Region |
| Southeastern Connecticut Planning Region, CT | 32 km (20 mi) | WSW of here | earthquakes near Southeastern Connecticut Planning Region |
| South Central Connecticut Planning Region, CT | 33 km (21 mi) | ENE of here | earthquakes near South Central Connecticut Planning Region |
| Suffolk County, NY | 50 km (31 mi) | NNE of here | earthquakes near Suffolk County |
| Capitol Planning Region, CT | 52 km (32 mi) | SSE of here | earthquakes near Capitol Planning Region |
| Naugatuck Valley Planning Region, CT | 56 km (35 mi) | ESE of here | earthquakes near Naugatuck Valley Planning Region |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
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.