QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1mb_lg

9 km NNW of Harrison, Maine

· 3.4 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oxford County 34 kmAndroscoggin County 43 kmCarroll County 51 kmCumberland County 53 kmCoos County 68 kmSagadahoc County 78 kmKennebec County 82 kmYork County 85 kmFranklin County 92 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 (mb_lg)
Depth
3.4 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
Oxford County, 34 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2206 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 8 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 44.1873, -70.7422. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oxford County, ME 34 km (21 mi) S of here earthquakes near Oxford County
Androscoggin County, ME 43 km (27 mi) W of here earthquakes near Androscoggin County
Carroll County, NH 51 km (32 mi) NE of here earthquakes near Carroll County
Cumberland County, ME 53 km (33 mi) NW of here earthquakes near Cumberland County
Coos County, NH 68 km (42 mi) SE of here earthquakes near Coos County
Sagadahoc County, ME 78 km (48 mi) WNW of here earthquakes near Sagadahoc County

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

Aftershocks so far

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

  1. 1.8 2 km SW of Gray, Maine
  2. 1.6 2 km NW of Hanover, Maine
  3. 1.7 6 km S of Livermore, Maine
  4. 1.8 6 km SSE of Turner, Maine
  5. 1.7 6 km SSW of Livermore, Maine
  6. 1.6 6 km ENE of Buckfield, Maine
  7. 1.7 4 km S of Carthage, Maine
  8. 2.5 6 km N of Turner, Maine
  9. 2.4 Maine
  10. 1.9 0 km NNE of Gorham, New Hampshire
  11. 2.9 0 km SSW of Gorham, New Hampshire
  12. 2.0 5 km SW of Albany, New Hampshire
  13. 1.8 2 km SSE of West Paris, Maine

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.