Earthquake · reviewed by a seismologist
M 1.6ml
2 km S of Henniker, New Hampshire
- When
- Magnitude
- M 1.6 (ml)
- Depth
- 4.0 km below the surface
- Felt
- 1 report
- Nearest
- Merrimack County, 20 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 531 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.
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.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- 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.
Where
Epicentre 43.1552, -71.8266. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Merrimack County, NH | 20 km (12 mi) | SW of here | earthquakes near Merrimack County |
| Hillsborough County, NH | 28 km (18 mi) | NNW of here | earthquakes near Hillsborough County |
| Sullivan County, NH | 39 km (24 mi) | SE of here | earthquakes near Sullivan County |
| Cheshire County, NH | 43 km (27 mi) | NE of here | earthquakes near Cheshire County |
| Belknap County, NH | 52 km (32 mi) | SW of here | earthquakes near Belknap County |
| Rockingham County, NH | 62 km (38 mi) | WNW of here | earthquakes near Rockingham County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.5 2 km S of Bedford, New Hampshire
- 2.1 2 km NNW of Milford, New Hampshire
- 1.9 2 km N of Webster, New Hampshire
- 1.9 4 km ESE of Northfield, New Hampshire
- 1.5 5 km SSE of Boscawen, New Hampshire
- 1.5 6 km SE of New Hampton, New Hampshire
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.