QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

1 km W of North Plymouth, Massachusetts

· 5.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plymouth County 4 kmBristol County 40 kmNorfolk County 45 kmSuffolk County 48 kmBarnstable County 53 kmBristol County 57 kmDukes County 66 kmNewport County 71 kmProvidence County 73 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 2.1 (ml)
Depth
5.0 km below the surface
Felt
48 reports · strongest reported intensity III
Nearest
Plymouth County, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2149 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 48 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 41.9709, -70.7019. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plymouth County, MA 4 km (2 mi) ESE of here earthquakes near Plymouth County
Bristol County, MA 40 km (25 mi) NE of here earthquakes near Bristol County
Norfolk County, MA 45 km (28 mi) ESE of here earthquakes near Norfolk County
Suffolk County, MA 48 km (30 mi) SSE of here earthquakes near Suffolk County
Barnstable County, MA 53 km (33 mi) WNW of here earthquakes near Barnstable County
Bristol County, RI 57 km (35 mi) ENE of here earthquakes near Bristol 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. 1.8 3 km ESE of Acushnet, Massachusetts

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.