QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

2 km NE of Danville, New Hampshire

· 6.9 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Rockingham County 7 kmEssex County 37 kmStrafford County 41 kmHillsborough County 51 kmMiddlesex County 55 kmMerrimack County 63 kmYork County 66 kmSuffolk County 66 kmBelknap County 71 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
Magnitude
M 1.7 (ml)
Depth
6.9 km below the surface
Felt
31 reports · strongest reported intensity III
Nearest
Rockingham County, 7 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 219 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 31 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 42.9272, -71.1004. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rockingham County, NH 7 km (4 mi) S of here earthquakes near Rockingham County
Essex County, MA 37 km (23 mi) NNW of here earthquakes near Essex County
Strafford County, NH 41 km (26 mi) S of here earthquakes near Strafford County
Hillsborough County, NH 51 km (32 mi) E of here earthquakes near Hillsborough County
Middlesex County, MA 55 km (34 mi) NNE of here earthquakes near Middlesex County
Merrimack County, NH 63 km (39 mi) SE of here earthquakes near Merrimack County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 1.5 2 km S of Bedford, 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

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